Abstract: The object of the present invention relates to a plated steel material and a method of production the same, having enhanced corrosion resistance and workability required for outdoor and exposed uses such as structures, revetments, fishing nets, fences, etc.

Abstract: The method for manufacturing coated steel sheet has the steps of: immersing a steel sheet in a hot-dip coating bath to form an Al—Zn base coating layer containing 20 to 95 mass % Al on the steel sheet, forming a passivated layer on the coating layer; and applying thermal history to the coating layer. The thermal history is applied immediately after the steel sheet left the hot-dip coating bath or in a temperature range of from T(° C.) between 130° C. and 300° C. to 100° C.

Abstract: This invention provides a plated steel wire with high corrosion resistance and excellent workability, wherein the average composition of the plating alloy in the plated steel wire comprises, in terms of weight percentage, Al: 4-20%, Mg: 0.8-5%, and if necessary one or more from among Si: ≦2%, Na: 0.001-0.1% and Ti: 0.01-0.1%, with the remainder Zn, and an Fe—Zn alloy layer of no greater than 20 &mgr;m thickness is present at the plating-base metal interface; it is produced by coating a steel wire with a molten zinc plating composed mainly of zinc as the first stage and then.coating it with a molten zinc alloy plating with the aforementioned average composition as the second stage. The maximum plating bath immersion time is 20 seconds, and the part of the plated steel wire drawn out from the plating bath is purged with nitrogen gas.

Abstract: A steel for forming a high strength steel sheet contains, in mass %, C: at most 0.04%, Si: at most 0.4%, Mn: 0.5-3.0%, P: at most 0.15%, S: at most 0.03%, Al: at most 0.50%, N: at most 0.01%, and Mo: 0.01-1.0%. Steel sheet formed from the steel is suitable for use as automotive panels.

Abstract: A dual phase high strength cold rolled steel having controlled amounts of carbon, manganese, and molybdenum is used as a starting material in a galvanizing/galvannealing process. Conditions in a multi-zone furnace of the galvanizing line can be controlled in a conventional manner while still effectively coating the high strength steel. A dual phase high strength steel product is made having a uniform coating of zinc in spite of the high manganese content of the steel.

Abstract: The hot dip Zn galvanized steel sheet has excellent balance between tensile strength and ductility and excellent coating adhesion, an average composition of a base steel thereof includes: 0.05-0.25 mass % of C; not more than 2.0 mass % of Si; 1.0-2.5 mass % of Mn; and 0.005-0.10 mass % of Al, wherein the C content at the base steel surface layer portion right under a coating layer is not more than 0.02 mass %, the base steel structure contains not less than 50% of martensite phase, the martensite phase including both tempered martensite phase and fine size martensite phase, and the remaining portion of the base steel structure being formed by ferrite phase and residual austenite phase. A method of producing the hot dip Zn galvanizing steel sheet is described.

Abstract: A process for fabricating a solder bump (113) includes providing an inorganic de-wetting substrate (102). In order to form a composite substrate (20), having the desired wetting/dewetting composition, a wetting metal is first applied on the inorganic de-wetting substrate to create at least one wetting metal pad (52). The composite substrate (20) is then dipped or otherwise immersed into a reservoir of liquid solder (106). Next, the composite substrate (20) is redrawn (116), or otherwise removed, from the liquid solder to form solder bumps (113) on the at least one metal wetting pad (52).

Abstract: As to a steel composition, in this invention, Si content is regulated to a given range and Nb and Cu or Ni, Mo are compositively added, and a recrystallization annealing is carried out to form an internal oxide layer just beneath a surface of a steel sheet and a surface oxide simultaneously formed on the surface of the steel sheet is removed by pickling. As a result, the formation of oxides of Si, Mn and the like is considerably decreased on the surface of the steel sheet in a subsequent heating before plating because the above internal oxide layer acts as a diffusion barrier.

Abstract: Enameled steel and process for enameling a zinc or zinc-alloy precoated steel surface includes providing steel having a surface to be precoated and enameled; applying a zinc or zinc-alloy coating having a thickness ranging from 1 to 30 &mgr;m to the surface of the steel to provide the zinc or zinc-alloy precoated steel surface; subjecting the zinc or zinc-alloy precoated steel surface to a heat pretreatment at a temperature of at least 500° C.; and enameling the zinc or zinc-alloy precoated steel surface with a vitreous enamel composition which has a content of adherence-providing oxides selected from the group consisting of Co, Ni, Cu, Sb and Mn of less than 0.1% by weight for a white enamel layer and less than 2.5% by weight for a colored enamel layer by firing the vitreous enamel composition to provide a vitreous enamel layer thereon.

Abstract: The invention relates to a high strength hot-dip galvanized and galvannealed steel sheets with excellent drawability for press forming and excellent plating adhesion that is useful as a member for automobiles, construction, electric devices and the like, and to a process for its manufacture. According to an embodiment of the invention, the steel sheet contains in terms of weight percent, C: 0.05-0.2%, Si: 0.2-2.0%, Mn: 0.2-2.5%, Al: 0.01-1.5%, Ni: 0.2-5.0%, P: <0.03% and S: <0.02%, the relationship between Si and Al being such that 0.4(%)≦Si+0.8 Al(%)≦2.0% and the remainder consisting of Fe and unavoidable impurities, the volume percentage of the retained austenite is 2-20% and the steel sheet surface wherein the relationship between the Ni and Si, Al in 0.5 &mgr;m of the steel sheet surface layer is such that Ni(%)≦¼ Si+⅓Al(%), has a Zn plating layer comprising Al: ≦1% with the remainder Zn and unavoidable impurities.

Abstract: The object of the present invention relates to a plated steel material and a method of production the same, having enhanced corrosion resistance and workability required for outdoor and exposed uses such as structures, revetments, fishing nets, fences, etc.

Abstract: To provide a steel sheet excellent in painting bake hardenability and anti aging property at room temperature: containing, in mass, 0.0001 to 0.20% of C, 2.0% or less of Si, 3.0% or less of Mn, 0.15% or less of P, 0.015% or less of S, and, in addition, 010% or less of Al and 0.001 to 0.10% of N so as to satisfy the expression 0.52Al/N<5 and, further, one or more of 2.5% or less of Cr, 1.0% or less of Mo and 0.1% or less of V so as to satisfy the expression (Cr+3.5MO+39V) ≧0.1, with the balance consisting of Fe and unavoidable impurities; having the value of BE170, evaluated after applying a 2% tensile deformation and then a heat treatment at 170° C. for 20 min., being 45 MPa or more, and any of the value of BH160, evaluated after applying a 2% tensile deformation and then a heat treatment at 160° C. for 10 min., and the value of BH150, evaluated after applying a 2% tensile deformation and then a heat treatment at 150° C. for 10 min.

Abstract: The present invention relates to a porous electrode wire for use in electrical discharge machining device and the method of manufacturing the same. The wire improves the machining speed at least 15% compared with a conventional zinc coated wire, which results from an increased ability to cool the wire with a cooling liquid, because of the increase in the surface area of the wire due to its having porous surface morphology. Since the surface of the porous wire presents uniform profile of outer periphery rather than surface protrusions, it does not affect machining accuracy. Further, the porous nature of the wire is expected to improve flushability during electrical discharge machining, providing spaces to eliminate particles resulting from the machining. Therefore, in accordance with the method of the present invention, a zinc coated wire having improved performance of machining speed and flushability compared with a conventional coated wire can be provided without additional processes.

Abstract: A plated lead for electrical devices is plated with a Sn-based lead-free alloy containing 0.001-0.1 weight percent of Ga. The formation of oxides in a hot dipping bath can be suppressed by the presence of 0.001-0.1 weight percent of P in the alloy.

Abstract: A method of coating of steel products such as plate and sheet using an aluminum-zinc coating alloy includes modifying the coating bath with a particulate compound constituent in effective amounts to decrease the spangle facet size of the coated product, improve tension bend rust stain performance, and coated product paintability. Constituents include borides such as titanium boride and aluminum borides, carbides such as titanium carbide, and aluminides such as titanium aluminide. The method produces a coated steel product that does not require temper rolling for painting.

Abstract: A coated steel material excellent in corrosion resistance and a method of producing the same, wherein a coated steel material has on the surface of the steel sheet a Zn-alloy coating layer containing 1-10 wt % of Mg, 2-19 wt % of Al and 0.01-2 wt % of Si, where Mg and Al satisfy Mg (%)+Al (%)≦20%, the balance being Zn and unavoidable impurities, and has a coating layer structure of a Mg intermetallic compound or the like. As a base metal treatment, it is preferably provided with a Ni coating layer. The coated Zn-alloy coated steel sheet may have provided on the coating layer, as an intermediate layer, a chromate film layer, and, as an upper layer, an organic coating layer. The Zn-alloy coating layer may further contain one or more of 0.01-1 wt % of In, 0.01-1 wt % of Bi and 1-10 wt % of Sn. The coated steel material may be painted.

Abstract: The present invention relates to a Zinc alloy yielding anti-corrosive coatings on ferrous materials; characterized as consisting of zinc plus its usual impurities and possibly aluminum and/or lead as well as alloying metals consisting of between x and y% by weight of nickel together with between v and w% by weight of at least one of the metal: vanadium and chrome wherein: x is equal to or higher than 0.001% by weight, preferably higher than 0.04% by weight, y is lower than or equal to 0.6% by weight, preferably lower than 0.2% by weight, v is equal to or higher than 0.001% by weight, preferably higher than 0.03% by weight, w is lower than or equal to 0.6% by weight, preferably lower than 0.04% by weight.

Abstract: A method for providing a tin-plated wire which is free from thermal oxidation yellowing. In a tin-plated wire which comprises a core wire 1 with its surface being formed with a tin-plating layer 2, the composition of the plating is comprised of 30 to 500 wppm gallium, and tin or tin alloy that makes up the remainder thereof. With the content of Ga more than 30 wppm, thermal yellowing is able to be prevented. As too much content of Ga causes surface roughness, the content of Ga must be 500 wppm or below.

Abstract: A hot-dip galvanized steel sheet is produced by rough rolling a steel, finish rolling the rough rolled steel at a temperature of Ar3 point or more, coiling the finish rolled steel at a temperature of 700° C. or less, and hot-dip galvanizing the coiled steel at a pre-plating heating temperature of Ac1 to Ac3. A continuous hot-dip galvanizing operation is performed by soaking a pickled strip at a temperature of 750 to 850° C., cooling the soaked strip to a temperature range of 600° C. or less at a cooling rate of 1 to 50° C. per second, hot-dip galvanizing the cooled strip, and cooling the galvanized strip so that the residence time at 400 to 600° C. is within 200 seconds. The steel sheet has a structure consisting essentially of ferrite and martensite.

Abstract: The method for hot dip galvanizing comprises the steps of: dividing a plating vessel holding a molten metal into a plating tank and a dross removing tank; conducting hot dip galvanizing to a steel strip by immersing thereof in the molten metal bath; then transferring the molten metal bath from the plating tank to the dross removing tank; removing a dross from the molten metal bath in the dross removing tank; and recycling the molten metal bath from the dross removing tank to the plating tank through an opening located on the plating tank. The apparatus for galvanizing comprises a plating tank, a dross removing tank, a means to transfer the molten metal bath from the plating tank to the dross removing tank, and an opening located on the plating tank to recycle the molten metal bath from the dross removing tank to the plating tank.

Abstract: A steel sheet having a composition comprising C: 0.05-0.20 mass %, Si: 0.3-1.8 mass %, Mn: 1.0-3.0 mass %, Fe of the balance and inevitable impurities is subjected to a primary step of primary heat treatment and subsequent rapid cooling to Ms point or lower, a secondary step of secondary heat treatment and subsequent rapid cooling, and a tertiary step of galvanizing treatment and rapid cooling, so as to turn the structure of the steel sheet into a composite structure of 20% or more by volume of tempered martensite, 2% or more by volume of retained austenite, ferrite and a low-temperature transformation phase. A galvanized layer is deposited on the surface of the steel sheet. It is preferred to cool the steel sheet to 300° C. at a cooling rate of 5 ° C./sec. or more after the galvanizing treatment. After the galvanizing treatment, alloying treatment may be conducted.

Abstract: A zinc coating directly covers a bare ferrous base of parking meter housing parts. A non-epoxy thermosetting electrically insulating organic non-epoxy powder coating directly covers the zinc coating. The organic coating is directly applied to the zinc coating by electrostatically charging the powder and parts with opposite d.c. voltage polarities and by heating the powder so it adheres to and covers the zinc coating. Alternatively, the base is zinc, directly covered by the organic powder coating.

Abstract: The present invention provides a high strength thin excellent workability and galvanizability, having a composition comprising from 0.01 to 0.20 wt. % C, up to 1.0 wt. % Si, from 1.0 to 3.0 wt. % Mn, up to 0.10 wt. % P, up to 0.05 wt. % S, up to 0.10 wt. % Al, up to 0.010 wt. % N, up to 1.0 wt. % Cr, from 0.001 to 1.00 wt. % Mo, and the balance Fe and incidental impurities, wherein a band structure comprising a secondary phase has a thickness satisfying the relation Tb/T≦0.005 (where, Tb: average thickness of the band structure in the thickness direction of steel sheet; T: steel sheet thickness), and a manufacturing method thereof, and a manufacturing method of a high strength hot-dip galvanized steel sheet or a high strength galvannealed steel sheet applying hot-dip galvanizing or further galvannealing, and giving an excellent workability, a high tensile strength, and excellent galvanizability, coating adhesion and corrosion resistance.

Abstract: The method for hot dip galvanizing comprises the steps of: dividing a plating vessel holding a molten metal into a plating tank and a dross removing tank; conducting hot dip galvanizing to a steel strip by immersing thereof in the molten metal bath; then transferring the molten metal bath from the plating tank to the dross removing tank; removing a dross from the molten metal bath in the dross removing tank; and recycling the molten metal bath from the dross removing tank to the plating tank through an opening located on the plating tank. The apparatus for galvanizing comprises a plating tank, a dross removing tank, a means to transfer the molten metal bath from the plating tank to the dross removing tank, and an opening located on the plating tank to recycle the molten metal bath from the dross removing tank to the plating tank.

Abstract: A method of coating of steel products such as plate and sheet using an aluminum-zinc coating alloy includes modifying the coating bath with a particulate compound constituent in effective amounts to decrease the spangle facet size of the coated product, improve tension bend rust stain performance, and coated product paintability. Constituents include borides such as titanium boride and aluminum borides, carbides such as titanium carbide, and aluminides such as titanium aluminide. The method produces a coated steel product that does not require temper rolling for painting.

Abstract: A hot-dip Zn—Al—Mg plated steel sheet good in corrosion resistance and surface appearance that is a hot-dip Zn-base plated steel sheet obtained by forming on a surface of a steel sheet a hot-dip Zn—Al—Mg plating layer composed of Al: 4.0-10 wt. %, Mg: 1.0-4.0 wt. % and the balance of Zn and unavoidable impurities, the plating layer having a metallic structure including a primary crystal Al phase or a primary crystal Al phase and a Zn single phase in a matrix of Al/Zn/Zn2Mg ternary eutectic structure. To obtain a plating layer possessing this metallic structure, the cooling rate of the plating layer adhering to a steel strip extracted from a plating bath and the plating bath temperature are appropriately controlled in a continuous hot-dip plating machine and/or appropriate amounts of Ti and B are added to the bath.

Abstract: The present invention relates to galvanized steel having a high aluminum content in the coating, as well as a batch hot-dip galvanization process for making such steel. The galvanized steel herein has a coating comprising an inner layer of intermetallic iron aluminum compounds, such as Fe2Al5 (which may have some zinc present), and an outer layer of intermetallic zinc aluminum compounds containing from about 17% to about 40% (preferably about 22%, the Zn—Al eutectoid) aluminum (which may have some iron present). The batch hot-dip galvanization process for making such steel comprises: (a) fluxing the steel by electroless plating on the surface of the steel of a metal such as tin, copper or nickel; and (b) dipping the fluxed steel into a molten galvanization bath comprising zinc and from about 17% to about 40% aluminum.

Abstract: Galvannealed steel sheet and method, made by applying hot-dip galvanizing to a steel sheet, heating at a heating rate of at least about 10° C./second to a maximum sheet temperature within a range of from about 470 to 550° C., and applying an alloying treatment; the Al content XAl% in the hot-dip galvannealing layer and the coating weight W g/m2 satisfy the following equation (1); thereby producing a Zn—Fe galvannealing layer having an iron content of from about 7 to 12%; the galvannealed steel sheet has intensities of &zgr;-phase, &dgr;1-phase and &Ggr;-phase that satisfy the following equations (4) and (5) as observed through X-ray diffraction with the galvannealing layer peeled off the galvannealed steel sheet at the galvannealing/steel sheet interface, and the galvannealed steel sheet having excellent press workability, having a whiteness and a glossiness within prescribed ranges: 5≦W×(XAl−0.12)≦15  (1) I(&zgr;:1.26)/I(&dgr;1:2.13)≦0.

Abstract: A hot-dip galvanized steel sheet composed of a basis steel sheet containing Si in an amount of 0.05-2.5 mass % and Mn in an amount of 0.2-3 mass % and a hot-dip galvanized zinc layer formed on the surface thereof, wherein said hot-dip galvanized zinc layer is formed in such a way that there is an Si—Mn enriched phase which is found, by observation under a scanning electron microscope or a transmission electron microscope, in the vicinity of the interface in a region no shorter than 50 &mgr;m in the cross section perpendicular to the interface between the basis steel sheet and the hot-dip galvanized zinc layer, said Si—Mn enriched phase containing more than twice as much Si and/or Mn as the basis steel sheet and extending over a length no more than 80% of the length of the interface observed. This hot-dip galvanized steel sheet is free of bare spots even in the case where the basis steel sheet contains Si and Mn in a comparatively large amount and hence is liable to suffering bare spots.

Abstract: The present invention relates to galvanized steel having a high aluminum content in the coating, as well as a batch hot-dip galvanization process for making such steel. The galvanized steel herein has a coating comprising an inner layer of intermetallic iron aluminum compounds, such as Fe2Al5 (which may have some zinc present), and an outer layer of intermetallic zinc aluminum compounds containing from about 17% to about 40% (preferably about 22%, the Zn—Al eutectoid) aluminum (which may have some iron present). The batch hot-dip galvanization process for making such steel comprises: (a) fluxing the steel by electroless plating on the surface of the steel of a metal such as tin, copper or nickel; and (b) dipping the fluxed steel into a molten galvanization bath comprising zinc and from about 17% to about 40% aluminum.

Abstract: A P- and Ti-added galvannealed steel sheet superior in ductility, and a process for production thereof. It is made of a cold-rolled steel sheet and has alloyed hot-dip galvanizing on the surface thereof, said cold-rolled steel sheet having the chemical composition (in terms of wt %) of C: less than 0.010%, Si: no more than 0.5%, Mn: 1.0˜3.0%, P: no more than 0.20%, S: no more than 0.01%, Al: 0.005˜0.10%, N: no more than 0.0050%, Ti/48−(C/12+N/14+S/32): 0.0003˜0.0018 with the remainder being chiefly Fe, and said cold-rolled steel sheet being characterized by &rgr;1≦107 and &rgr;2≦5×105, where &rgr;1 is the number of precipitates whose particle diameter (D) is in the range of 10 nm≦D<100 nm and &rgr;2 is the number of precipitates whose particle diameter (D) is in the range of 100 nm≦D.

Abstract: A process for forming a silver coating on a surface of a vitreous substrate is described. The process comprises an activating step in which said surface is contacted with an activating solution, a sensitising step in which said surface is contacted with a sensitising solution, and a subsequent silvering step in which said surface is contacted with a silvering solution comprising a source of silver to form the silver coating. The process is characterised in that said activating solution comprises ions of at least one of bismuth (III), chromium (II), gold (III), indium (III), nickel (II), palladium (II), platinum (II), rhodium (III), ruthenium (III), titanium (III), vanadium (III) and zinc (II).

Abstract: A hot-dip galvanized steel sheet which is produced from a cold-rolled steel sheet, as a base steel sheet, consisting essentially of C: 0.010-0.06 wt %, Si: no more than 0.5 wt %, Mn: no less than 0.5 wt % and less than 2.0 wt %, P: no more than 0.20 wt %, S: no more than 0.01 wt %, Al: 0.005-0.10 wt %, N: no more than 0.005 wt %, Cr: no more than 1.0 wt %, Mn+1.3Cr: 1.9-2.3 wt %, Fe: remainder, and having a structure composed of ferrite and a second phase containing martensite, said second phase in the structure accounting for no more than 20% in terms of area and martensite in the second phase accounting for no less than 50%, and which has a zinc-plated layer formed on the surface thereof by hot-dip galvanizing or hot-dip galvannealing. A process for production of said hot-dip galvanized steel sheet. This steel sheet has a composite structure containing martensite and yet it has a low strength (no higher than 500 MPa) and also has good strength-ductility balance.

Abstract: The present invention relates to a porous electrode wire for use in electrical discharge machining and the method of manufacturing the same. The wire improves the machining speed at least 15% compared with a conventional zinc coated wire, which results from an increased cooling ability of the wire with a cooling liquid because of the increase in the surface area of the wire having porous surface morphology. Since the surface of the porous wire presents uniform profile of outer periphery rather than surface protrusions, it does not affect machining accuracy. Further, the porous nature of the wire is expected to improve flushability during the electrical discharge machining, providing spaces to eliminate particles of the machining. Therefore, in accordance with the method of the present invention, a zinc coated wire having improved performance of machining speed and flushability compared with a conventional coated wire can be provided without additional processes.

Abstract: A process for non-continuous galvanization of a metal object with a Zn—Al alloy including the steps of pre-coating the object with a metallic layer of sufficient thickness to protect the object from oxidation and yet sufficiently thin to permit the pre-coating to substantially completely react with or dissolve in the molten Zn—Al bath, subjecting the precoated object to a surface activation treatment by immersing it in hydrochloric acid and thereafter allowing the surface to dry with a protective coating of a chloride salt, and thereafter immersing the object in the Zn—Al bath.

Abstract: An alloy for galvanizing steel comprises, by weight, aluminum in the amount of at least 0.001% to 0.007%, preferably 0.002 to 0.004%, tin in the amount of at least 0.5% to a maximum of 2%, preferably at least 0.8%, and one of an element selected from the group consisting of vanadium in the amount of at least 0.02%, preferably 0.05% to 0.12%, titanium in the amount of at least 0.03%, preferably 0.06% to 0.10%, and both vanadium and titanium together in the amount of at least 0.02% vanadium and at least 0.01% titanium for a total of at least 0.03%, preferably 0.05% to 0.15%, the balance zinc containing up to 1.3 wt. % lead. In another embodiment, the alloy comprises, by weight, aluminum in the amount of at least 0.001%, tin in the amount of 0.5% to 2%, and vanadium and nickel together in the amount of at least 0.02% vanadium and at least 0.02% nickel to a maximum of 0.15% vanadium and nickel collectively. Titanium may be added in an amount, by weight, of at least 0.01% titanium to a collective maximum of 0.

Abstract: A production method for a lead-containing hot-galvanized chromated steel sheet with excellent resistance to blackening and white rust formation comprises: (a) plating a steel sheet in a hot-galvanizing bath containing 0.05-0.3 wt. % lead and 0.1-0.3 wt. % aluminum; (b) coating this with a chromating solution containing chromium (VI) ions, chromium (III) ions and nitrate ions in which the Cr(III)/Cr(VI) molar ratio is 1/9-1/1 and the nitrate ion to total chromium ion molar ratio is 0.1-1.6; and (c) without washing with water, drying the sheet at 40-250 deg. C., to form a 5-50 mg/m integral 2 (in terms of chromium) chromate film.

Abstract: A batch process for making galvanized steel products with a low lead or no lead zinc coating is described. Metal parts are cleaned, rinsed, pickled and rinsed and are immersed in a hot, pre-flux solution and thoroughly dried before they are immersed in a molten zinc bath. The dryer system includes a mechanism for rotating the batch of parts as they are dried. In one embodiment of the invention, a batch of steel pipe is dried by hot air having a maximum temperature of 125° C. The descrambler system rotates the pipe and moves the pipe in contact with the divider apparatus to separate the pipe in the dryer. The pipe, thoroughly dried, is immersed into a molten zinc bath having less than 0.05% by weight lead, and the use of a top-flux on the molten zinc bath is optional.

Abstract: The present invention relates to a porous electrode wire for use in electrical discharge machining and the method of manufacturing the same. The wire improves the machining speed at least 15% compared with a conventional zinc coated wire, which results from an increased cooling ability of the wire with a cooling liquid because of the increase in the surface area of the wire having porous surface morphology. Since the surface of the porous wire presents uniform profile of outer periphery rather than surface protrusions, it does not affect machining accuracy. Further, the porous nature of the wire is expected to improve flushability during the electrical discharge machining, providing spaces to eliminate particles of the machining. Therefore, in accordance with the method of the present invention, a zinc coated wire having improved performance of machining speed and flushability compared with a conventional coated wire can be provided without additional processes.

Abstract: A steel material subjected to preliminary treatments to remove an oxide film on the surface is immersed in a molten flux bath in an independent vessel and thereafter immersed in a molten zinc-aluminum alloy bath in a separate vessel to be galvanized with a coating of the alloy. The molten flux bath consists essentially of 5-25 wt % of an alkali metal chloride, typified by sodium chloride, or an alkaline earth metal, and the balance being zinc chloride. The flux bath may additionally contain 1-5 wt % of an alkali metal fluoride typified by sodium fluoride. The method allows for inexpensive, efficient and one-stage galvanizing with a corrosion-resistant molten zinc alloy of a high aluminum content to produce a smooth, uniform and beautiful galvanized layer on the surfaces of various steel materials.

Abstract: An inexpensive panel member for an automobile body. Two layers of Zn plating (2a, 2b) are formed over two opposite surfaces of a steel plate (1) respectively. Then, another layer of plating (3) is formed over at least one of the two layers of Zn plating. This another layer of plating (3) is made from a metal or alloy having a standard electrode potential equal to or more than Fe. In this manner, a plated steel panel sheet (4) is prepared. Subsequently, a non-plated steel panel sheet (5) is joined with the plated steel panel sheet (4) in a partly overlapping manner such that the another layer of plating (3) contacts the non-plated steel panel sheet (5). The another layer of plating is made from Ni, Ni alloy, Fe—P alloy, Co, or Co alloy. A chemical conversion coating (Phosphophyllite) (8) and common painting layers (97, 98, 99) are further formed over the joined sheets when used for an automobile body.

Abstract: The present invention relates to a zinc alloy yielding anti-corrosive coatings on ferrous materials; characterized as consisting of zinc plus its usual impurities and possibly aluminium and/or lead as well as alloying metals consisting of between x and y % of nickel together with between v and w % of at least one of the metal: vanadium and chrome wherein: x is equal to or higher than 0.001, preferably higher than 0.04, y is lower than or equal to 0.6, preferably lower than 0.2, v is equal to or higher than 0.001, preferably higher than 0.03, w is lower than or equal to 0.6, preferably lower than 0.04.

Abstract: A molten metal is deposited on the surfaces of a metal strip by continuously dipping the metal strip in a coating bath. The metal strip is lifted at a constant speed while supported with a pair of upper and lower support rolls in the coating bath. The coating weights of the molten metal deposited on the surfaces of the metal strip are adjusted by wiping the molten metal with gases from gas wiping nozzles disposed above the surface of the coating bath.

Abstract: A hot-dip Zn—Al—Mg plated steel sheet good in corrosion resistance and surface appearance that is a hot-dip Zn-base plated steel sheet obtained by forming on a surface of a steel sheet a hot-dip Zn—Al—Mg plating layer composed of Al: 4.0-10 wt. %, Mg: 1.0-4.0 wt. % and the balance of Zn and unavoidable impurities, the plating layer having a metallic structure including a primary crystal Al phase or a primary crystal Al phase and a Zn single phase in a matrix of Al/Zn/Zn2Mg ternary eutectic structure. To obtain a plating layer possessing this metallic structure, the cooling rate of the plating layer adhering to a steel strip extracted from a plating bath and the plating bath temperature are appropriately controlled in a continuous hot-dip plating machine and/or appropriate amounts of Ti and B are added to the bath.

Abstract: A cold-rolled steel strip or hot-dip coated cold-rolled steel strip for use as a fire-proof building member has composition consisting of 0.01-0.25 wt. % C, up to 1.5 wt. % Si, 0.05-2.5 wt. % Mn, up to 0.1 wt. % P, no more than 0.02 wt. % S, 0.005-0.1 wt. % Al, 0.05-1.0 wt. % Mo, optionally 0.005-0.2 wt. % one or more selected from Ti, Nb, V and W, optionally one or more of 0.05-0.6 wt. % Cu, 0.05-0.6 wt. % Ni, 0.05-3.0 wt. % Cr and 0.0003-0.003 wt. % B and the balance being essentially Fe except inevitable impurities. The cold-rolled steel strip is manufactured by hot-rolling, acid-pickling, cold-rolling and then annealing at a temperature above its recrystallization temperature but below 950° C. The hot-dip coated cold-rolled steel strip is manufactured in the same way but in-line heating a cold-rolled steel strip at a temperature above its recrystallization temperature but below 950° C. and then immersing it into a coating bath.

Abstract: A process for galvanizing a metal strip having a given area in a continuous galvanizing line through which the strip is run at a given speed comprising, in series, the steps of: (iii) pre-heating the metal strip; (iv) annealing the metal strip; (v) cooling the metal strip; (vi) dipping the metal strip into a bath comprising liquid zinc or a liquid zinc alloy, the steps (i)-(iv) being maintained in closed fluid contact with each other; (vii) circulating a reducing atmosphere comprising an inert gas and hydrogen to the steps (i)-(iv) in the galvanizing line and exposing the metal strip, before the step (iv) of dipping the metal strip into the bath, to the reducing atmosphere in order to remove oxides present on its surface, (viii) replenishing the reducing atmosphere in the galvanizing line by injecting the reducing atmosphere into the line and adjusting the hydrogen flow rate depending on the area of the metal strip to be treated per unit time.

Abstract: In a method of hot-galvanizing ferrous materials, in order to improve results, there is provision, during the course of the galvanizing, for a step for the introduction of various suitable metals, preferably selected from aluminum, potassium, nickel, magnesium and manganese, which are introduced in the form of their salts.

Abstract: An improved fluxing method for the galvanization of steel, particularly batch galvanization, is disclosed. In this process, a metallic element is deposited (for example, by electroless plating) on the surface of the steel sheet or other article prior to its being dipped in the galvanization bath. Preferred metals for use in this fluxing process are tin, copper, nickel, with tin being more preferred, and mixtures of copper and tin being most preferred. This metallic film layer has a thickness between about 5 and about 50 nm. The process of the present invention provides a number of benefits when compared to conventional fluxing processes: for example, it is compatible with the inclusion of aluminum in the galvanization bath; it permits a greater time delay between the fluxing and galvanization operations; and it eliminates the formation of hydrogen chloride or other toxic fumes when the fluxed article is dipped in the molten zinc galvanization bath.

Abstract: An automated system for electroless metallization of optical glass fibers, includes a plurality of spaced apart plating stations having different solutions for electroless metallization of optical fibers. A motor-driven fiber transport and dipping apparatus is used in the system for shuttling optical glass fibers to the plating stations and immersing the optical glass fibers in the solutions. A programmable controller directs the transport and dipping apparatus to the plating stations in a selected order and at selected time intervals, and directs the apparatus at each of the stations to immerse the fibers into the solutions at a selected entry rate, for a selected duration, and at a selected withdrawal rate.

Abstract: This disclosure relates to an Sn-containing and/or Bi-containing zinc alloy for hot galvanizing steel, more particularly for component galvanizing. The alloy is composed of 1 to 5% by weight of Sn+Bi, 0 to saturation of Pb, 0.025 to 0.200% by weight of at least one of Ni, Cr or Mn, 0 to 0.030% by weight of at least one of Al, Ca and Mg, the remainder being zinc and unavoidable impurities.