Abstract: This invention involves the technical area of chemical plating in aluminum radiators, referring specifically to the partial chemical plating technique in the inner cavity of aluminum radiator. It undergoes the inner cavity shielding before zinc impregnation and continues chemical oxidization in other parts in the chemical the based on the existing oxidization trough, making the unshielded area unable to sediment a layer of zinc and be plated with nickel and phosphors alloy. Then, it is applied with enclosure technique. The chemical oxidization and enclosure enable the sections other than the inner cavity in the aluminum radiator to be covered with a layer of oxidization film against erosion from acid and alkali, so the sections covered with a oxidization film will not accumulate a layer of zinc nor be plated with nickel and phosphor alloy in the subsequent zinc impregnation and nickel plating. Only the surface of the inner cavity is plated with nickel and phosphor alloy.

Abstract: Galvannealed steel sheet simultaneously able to achieve excellent workability and high strength and a method of production of the same are provided as an objective, in particular high strength galvannealed steel sheet excellent in workability, comprising high strength steel sheet containing, by mass %, C: 0.05 to 0.15%, Si: 0.3 to 2.0%, Mn: 1.0 to 2.8%, P: 0.03% or less, S: 0.02% or less, Al: 0.005 to 0.5%, and N: 0.0060% or less and a balance of Fe and unavoidable impurities, where, when % C, % Si, and % Mn respectively represent the C, Si, and Mn contents, (% Mn)/(% C)?12 and (% Si)/(% C)?4 being satisfied, on the surface of which having a galvannealed layer containing Al: 0.05 to 0.5 mass % and Fe: 5 to 15 mass % and a balance of Zn and unavoidable impurities, said steel sheet satisfying a relationship of tensile strength F (MPa) and elongation L (%) of L?52?0.035×F.

Abstract: The present invention provides a highly corrosion-resistant plated steel sheet that can achieve excellent surface smoothness and formability and, according to the process of the present invention, a hot-dip galvanized steel product excellent in surface smoothness and formability having on the steel product surface a zinc alloy plating layer composed of 4 to 22% by mass of Al, 1 to 5% by mass of Mg, 0.000001 to 0.1% by mass of Ti, 0.000001 to 0.5% by mass of Si and the balance of Zn and unavoidable impurities, the plating layer of the plated steel product having a metal structure in which an [Mg2Si phase], an [Al phase], a [Zn2Mg phase] and a [Zn phase] are present in a mixture in the matrix of an [Al/Zn/Zn2Mg ternary eutectic structure], and the plating layer containing a Ti—Al base intermetallic compound in the [Al phase] and/or the [Zn2Mg phase] and/or the [Zn phase], is produced.

Abstract: A device and method for thermally galvanizing objects, in particular metal objects, includes pretreating an object for treating. The pretreated object is arranged in a flux bath for fluxing of the object and arranged in a zinc bath in order to have the material of the object react with zinc and to apply a zinc-containing layer to the object. The pretreating includes blasting the object with grains so as to remove at least the surface layer.

Abstract: The invention relates to a method for manufacturing a hot-dip plated metal strip comprising the steps of: introducing a metal strip into a molten metal bath of plating metal to adhere the molten metal onto the surface of the metal strip; taking out the metal strip, after turning the running direction of the metal strip, from the molten metal bath without applying external force from outside the surface of the metal strip; adjusting the plating weight of the molten metal adhered onto the metal strip; and controlling the shape of the metal strip using magnetic force in non-contact state directly before or after the step of adjusting the coating weight. The invention prevents adhesion of dross to the metal strip without degrading the productivity, and thus manufactures a high quality hot-dip plated metal strip.

Abstract: This invention relates to a method for forming on a metal substrate a surface treating film excelling in corrosion resistance and stability of film-forming agent, by applying a film-forming agent by a multistage electrification system comprising at least two stages.

Abstract: The invention relates to a method of providing additional corrosion protection to a localized portion of a pole such as a utility pole, support pole, or the like comprising the steps of: (1) determining which portion of the pole is to receive additional corrosion protection; (2) blast cleaning that localized portion of the pole which is to receive additional corrosion protection; (3) placing the pole into a caustic tank; (4) removing the pole from the caustic tank; (5) subjecting the pole to a caustic rinse; (6) placing the pole into an acid tank; (7) removing the pole from the acid tank; (8) subjecting the pole to an acid rinse; (9) placing the pole into a flux tank; (10) removing the pole from the flux tank; (11) placing the pole into a heated galvanizing kettle; and (12) removing the pole from the galvanizing kettle.

Abstract: Diffusion metallic anticorrosive zinc-iron-aluminum coatings of iron and iron-based item surfaces, realized by heating of products at temperatures of 370–450° C. in a saturating powder mixture environment in a closed container. The coating compositions are multiphase-polymetallic, and comprise zinc, iron and aluminum. Other elements may be added to attain specific coating properties. This coating exhibits a high corrosion resistance (at least a 700-hour corrosion resistance level in a standard salt spray test), a relatively high hardness level and good adhesion to secondary coatings.

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 control the spangle facet size of the coated product, improve tension bend rust stain performance, and improve 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 process is disclosed for the preparation of a steel surface for single-dip aluminium-rich zinc galvanizing. The process steps comprise: cleaning the surface so as to obtain less than 0.6 ?g/cm2 residual dirt; pickling the surface; applying a protective layer to the surface by immersion in a flux solution comprising bismuth. This invention also relates to a continuous steel product coated with a layer of metallic bismuth.

Abstract: The present invention relates to improved coatings for electrical or electronic connectors such as contacts or terminals used in automotive applications. Coatings in accordance with the present invention preferably comprise binary tin-silver coatings consisting of more than 1.0 wt % to about 20 wt %, preferably from 2.0 wt % to 15 wt %, and most preferably from 3.0 wt % to 10 wt %, silver and the balance essentially tin. The coating is preferably applied by immersing the substrate material in a molten tin-silver bath.

Abstract: A high-strength hot-dip galvanized steel sheet is provided which comprises a composite structure consisting essentially of ferrite and martensite. The steel comprises, by mass %, C: 0.05 to 0.12%, Si: not more than 0.05%, Mn: 2.7 to 3.5%, Cr: 0.2 to 0.5%, Mo: 0.2 to 0.5%, Al: not more than 0.10%, P: not more than 0.03%, and S: not more than 0.03%. The high-strength hot-dip galvanized steel sheet has not only excellent spot weldability, but also excellent “stability of material properties”, including tensile strength, total elongation, and yield strength, in a high range of strengths from 780 to 1180 MPa, even if the manufacturing condition (especially, the condition of the cooling process after annealing the steel sheet) is changed.

Abstract: A coated steel sheet having a coated layer on surfaces of a steel sheet of a composition containing not less than 0.1 mass % and under 3 mass % of Al, wherein a following condition A or B is met: A: An AlN precipitate layer exists on a matrix side near an interface between said steel sheet and said coated layer B: Oxide of Al exists in said matrix right under said surfaces of said steel sheet.

Abstract: A hardenable steel workpiece having two regions is first hardened so that both regions are of generally the same low ductility. Then only one of the regions is hot coated so as to increase the ductility of the one region while not heating and changing the ductility of the other region. The workpiece can be hardened by hot working or tempering. The hot coating can be done by dipping the one region in molten zinc.

Abstract: A method of manufacturing a high strength steel sheet containing, in mass %, C: 0.02 to 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%. The method includes performing hot rough rolling either directly or after heating to a temperature of at most 1300° C., commencing hot finish rolling either directly or after reheating or holding, completing finish rolling at a temperature of at least 780° C., performing coiling after cooling to a temperature of 750° C. or below at an average cooling rate of at least 3° C./second, heating to an annealing temperature of at least 700° C. and then cooling to a temperature of 600° C. or below at an average cooling rate of at least 3° C./second, then holding in a temperature range of 450-600° C. for at least 10 seconds, and performing hot dip galvanizing after cooling.

Abstract: A method of masking areas of an object during galvanizing of the object to prevent galvanizing material from adhering to the masked areas comprising the step of applying a polyurethane adhesive to the area.

Abstract: A process for the continuous dip-coating of a metal strip (1) in a tank (11) containing a liquid metal bath (12), in which process the metal strip (1) is made to run continuously through a duct (13), the lower part (13a) of which is immersed in the liquid metal bath (12) in order to define with the surface of the bath a liquid seal (14). A natural flow of the liquid metal from the surface of the liquid seal (14) is set up in two overflow compartments (25, 29) made in the duct (13) and each having an internal wall which extends the duct (13) in its lower part, and the level of liquid metal in the compartments is maintained at a level below the surface of the liquid seal (14). A plant for implementing the process.

Abstract: A process for the continuous dip-coating of a metal strip (1) in a tank (11) containing a liquid metal bath (12), in which process the metal strip (1) is made to run continuously through a duct (13), the lower part (13a) of which is immersed in the liquid metal bath (12) in order to define with the surface of the said bath a seal (14). A natural flow of the liquid metal from the surface of the liquid seal is set up in an overflow compartment (25) made in the duct (13) and having an internal wall which extends the duct (13) in its lower part, and the level of liquid metal in the compartment (25) is maintained at a level below the surface of the liquid seal (14). Also, a plant for implementing the process.

Abstract: The present invention relates to improved coatings for electrical or electronic connectors such as contacts or terminals used in automotive applications. Coatings in accordance with the present invention preferably comprise binary tin-silver coatings consisting of more than 1.0 wt % to about 20 wt %, preferably from 2.0 wt % to 15 wt %, and most preferably from 3.0 wt % to 10 wt %, silver and the balance essentially tin. The coating is preferably applied by immersing the substrate material in a molten tin-silver bath.

Abstract: A Sn-based metal-coated steel strip excellent in appearance comprises a Ni-based metal (such as Ni, a Ni—Sn alloy, a Ni—Zn alloy, a Ni—Fe alloy and a Ni—Co alloy) preplating layer and a Sn-based metal (such as a Sn—Zn alloy) coating formed thereon, and is characterized in that a Ni emission intensity line and an Fe emission intensity line obtained by glow discharge spectroscopy of the surface of the coated steel strip satisfy a relationship of the formula: T1?T2 wherein T1 is a sputtering time at the peak of a Ni emission intensity line, and T2 is a sputtering time at the inflection point of an Fe emission intensity line, or a relationship of the formulas: T1?T2, and 1?T1/T2?1.

Abstract: A high strength dual phase cold rolled steel having controlled amounts of carbon, manganese, and molybdenum is used as a starting material in a hot-dip zinc coating process to manufacture a high strength dual phase cold rolled steel having a conventional galvanized or galvannealed coating applied to at least one surface thereof, the zinc coated steel product having a uniform coating of zinc in spite of the high manganese content of the steel.

Abstract: An improved protective coating, for parking meters or other equipment that is subject to environmental deterioration and/or vandalism, having thereon at least a three layer coating of a composite thickness sufficiently thick to avoid pinholes and sufficiently thin to avoid crazing and cracking due to variations in the ambient environment. The coating has a conventional lower layer of zinc on or proximate to the equipment surface (in the alternative the substrate may be a zinc part); a second layer of a thermosetting polymer that has been applied by a powder coating electrostatic method, and a third, top, coating of an epoxysiloxane polymer. The total coating thickness should preferably not exceed about 6 mils.

Abstract: A system for hot-dip galvanizing metal components. The system is comprised of: i) a lifting device; ii) a lifting bow; and iii) a tank containing a molten galvanizing composition.

Abstract: A coated steel sheet having a coated layer on surfaces of a steel sheet of a composition containing not less than 0.

Abstract: The process of the present invention is directed to a method for making zinc or zinc-aluminum alloy additions to galvanizing baths. The process involves addition of a wire of zinc or zinc-aluminum alloy introduced directly into a molten galvanizing bath to more rapidly achieve a desired zinc or zinc-aluminum chemistry thereby reducing the time required to make the bath addition.

Abstract: A corrosion-resistant coated brass metal coated with a corrosion resistant alloy. The corrosion resistant alloy is a tin metal alloy or a tin and zinc metal alloy. The corrosion resistant metal alloy may also include one or more metal additives to improve the coating process and/or to alter the properties of the tin or tin and zinc metal alloy.

Abstract: A corrosion-resistant coated base metal coated with a corrosion resistant alloy. The corrosion resistant alloy includes tin and zinc. The corrosion resistant coated base metal includes a heat created intermetallic layer primarily including copper and zinc.

Abstract: A method and an apparatus for coating metal strip, particularly cold-rolled steel strip, with a coating metal which is in the molten state. The metal strip is heated and annealed in a heating furnace and subsequently the required strip temperature and surface properties are adjusted in a cooling zone. The strip is conducted through a coating container and, following the coating container in strip pulling direction, the coating metal thickness and the solidification process are controlled by a gas-operated stripping device. The operating gas for the stripping device is preheated in a partial area of the cooling zone of the heating furnace.

Abstract: A steel composition, in which, 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. Thus, there can be obtained high tensile strength hot-dipped steel sheets having a considerably excellent plating property.

Abstract: The method for manufacturing galvanized steel sheet has a step of adjusting the surface texture thereof by blasting solid particles against the surface thereof. The surface texture is defined by at least one parameter selected from the group of parameters consisting of mean roughness Ra on the surface of steel sheet, peak count PPI on the surface of steel sheet, and filtered centerline waviness Wca on the surface of steel sheet. The galvanized steel sheet has a surface in dimple-pattern texture.

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 control the spangle facet size of the coated product, improve tension bend rust stain performance, and improve 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 galvannealed steel sheet superior in workability wherein the steel sheet is characterized by containing silicon in an amount no less than 0.8 mass % and retained austenite in an amount no less than 3% (in terms of packing factor) and the alloy zinc plating is characterized by containing Zn—Fe alloy crystal grains which exist in its surface layer and have a specific crystal grain size such that the longer side of a crystal grain is no larger than twice the shorter side of a crystal grain and the number of crystal grains with an average particle size no smaller than 4 &mgr;m is no more than 5 per 70×50 &mgr;m. The steel sheet with alloy zinc coating has good mechanical properties (such as total elongation) and good plating surface slidability.

Abstract: The present invention is a method of partially galvanizing a piece obtained by injection molding, and a partially galvanize product produced by the method. The method of the present invention includes inserting a film of non-galvanizable material into a mold and then injecting a galvanizable material into the mold. After injection, the piece is taken out of the mold and the entire piece is run through a galvanizing process. Because of the film, a portion of the piece is galvanized, while the portion having the film is not galvanized.

Abstract: A method for hot dip galvanizing of hot-rolled steel strip, wherein in a first method step, the strip (50) is introduced into a pickling station (10-13) and a layer of scale and reaction products are removed from the strip surface in the pickling station. In another method step, the strip (50) is introduced into a rinsing station (21-23) and residues of the pickle and pickling products are removed from the strip surface in the rinsing station, and subsequently the strip is introduced into a drying station and is dried. And from there, in another method step, the strip is introduced into a furnace (40) and is adjusted to galvanizing temperature under a protective gas atmosphere. In a last method step, the strip is guided through a galvanizing bath and the surface of the (50) is coated with a hot dip galvanizing layer in the galvanizing bath, wherein the strip temperature in the furnace (40) is adjusted at most to 50° K. above immersion temperature of the strip (50) into the zinc bath.

Abstract: A method and apparatus for rapid and efficient changing-over the coating molten metal in a continuous steel strip coating line from a first aluminum-based coating composition to a second zinc-based coating comprising a first ceramic-lined tank provided with heating means for controlling the temperature of the molten metal in said first tank and a second smaller removable tank without heating means for containing said second coating molten metal adapted to be placed within said first tank, wherein the wall of the second removable tank is effectively heat conductive and preferably has a wall downwardly converging so that its positioning within the first tank is facilitated and damage to its ceramic lining is avoided. The weight of the second tank is mostly supported by the floating forces of the molten bath in said first tank.

Abstract: The process of the present invention is directed to a method for making zinc or zinc-aluminum alloy additions to galvanizing baths. The process involves addition of a wire of zinc or zinc-aluminum alloy introduced directly into a molten galvanizing bath to more rapidly achieve a desired zinc or zinc-aluminum chemistry thereby reducing the time required to make the bath addition.

Abstract: Gas wiping apparatus and method can reliably prevent edge overcoat and splash, and has face gas wiping nozzles extending widthwise of a strip material, a pair of baffle plates spaced from an edge of the strip material, an edge wiping nozzle disposed between baffle plates at its inner edge and adjacent the strip material edge, all with critical spacings relative to each other.

Abstract: The subject of the invention is a process for the continuous dip-coating of a metal strip (1) in a tank (11) containing a liquid metal bath (12), in which process the metal strip (1) is made to run continuously through a duct (13), the lower part of which is immersed in the liquid metal bath (12), in order to define with the surface of the said bath a liquid seal (14). In the region where the strip (1) leaves the liquid metal bath (12), the liquid metal is isolated from the surface of the said bath in an isolating enclosure (20) and the metal oxide particles and intermetallic compound particles are recovered by the liquid metal flowing from this region into the said enclosure (20) and the said particles are extracted from this enclosure (20).

Abstract: The present invention relates to a novel flux useful for hot dip galvanizing of iron and iron based alloys. The present invention also relates to a process for the preparation of the flux and to the use thereof for hot dip galvanizing of iron an iron based alloys. The present invention also relates to a method for the hot dip galvanizing of iron and iron based alloys using the novel flux.

Abstract: An object of the present invention is to provide a hot-dip galvanized steel sheet which is excellent in adhesion with a hot-dip galvanized zinc layer, and has high tensile strength and good formability even when a steel sheet containing Si and Mn in relatively larger amounts is used as a basis steel sheet. The hot-dip galvanized steel sheet is composed of: a basis steel sheet containing Si in an amount of 0.05 to 2.5% and Mn in an amount of 0.2 to 3%, by mass; a Fe plated layer formed on the basis steel sheet; and a hot-dip galvanized zinc layer formed on the surface layer of the basis steel sheet via the Fe plated layer, wherein oxides containing Si and/or Mn are discontinuously dispersed in the vicinity of the interface between the basis steel sheet and the Fe plated layer.

Abstract: The invention provides a galvannealed steel sheet which has an oxide layer having 10 nm or larger thickness on the plateau of the coating layer flattened by temper rolling. With the use of the galvannealed steel sheet, no powdering occurs during press-forming, and stable and excellent sliding performance is attained. By selecting the area percentage of the plateau of the flattened coating layer to a range from 20 to 80%, making the coating layer single layer of &dgr;1 phase, and letting &zgr; phase exist in the &dgr;1 phase, further improved sliding performance and anti-powdering property are obtained.

Abstract: A high strength dual phase cold rolled steel having controlled amounts of carbon, manganese, and molybdenum is used as a starting material in a hot-dip zinc coating process to manufacture a high strength dual phase cold rolled steel having a conventional galvanized or galvannealed coating applied to at least one surface thereof, the zinc coated steel product having a uniform coating of zinc in spite of the high manganese content of the steel.

Abstract: Self-aligning bearings are used for supporting a roll in molten zinc or zinc/aluminum, to permit the roll's shaft to align with the bearing axis between the pair of holding arms supporting the roll, and a pump for delivering metal under pressure to the bearing surfaces interface force a hydrodynamic film to lubricate the bearing components.

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 control the spangle facet size of the coated product, improve tension bend rust stain performance, and improve 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: Degradation of the surface luster of a hot-dip Zn—Al—Mg plated steel sheet is inhibited by controlling the contact temperature between the plating layer and a water stream in a water cooling step after plating layer solidification, thereby suitably controlling the strip temperature during contact with the water stream, and further by incorporating a small amount of a suitable readily oxidizing element in the plating bath to stabilize the oxidation state of the plating surface layer Al and Mg.

Abstract: A flux for hot dip galvanization comprises from:&Circlesolid;60 to 80 wt. % of zinc chloride (ZnCl2); 7 to 20 wt. % of ammonium chloride (NH4Cl); 2 to 20 wt. % of a fluidity modifying agent comprising at least one alkali or alkaline earth metal; 0.1 to 5 wt. % of a least one of the following compounds: NiCl2, CoCl2, MnCl2; and 0.1 to 1.5 wt. % of at least one of the following compounds: PbCl2, SnCl2, BiCl3, SbCl3.

Abstract: A method and a system for regenerating a metal bath contaminated by mixed crystals, particularly a tin bath (17) in a hot-dip coating process. A partial stream of the tin bath (17) is removed from the coating tank (15) and is first of all heated above its liquidus temperature in a heating unit (24). Subsequently, the tin bath is conducted over a cooling unit (27) and, while flowing through a filter (29), is cleaned of mixed crystals coming down as a result of the cooling. The filter 29 is a ceramic foam filter made of silicon carbide. Subsequently, the regenerated tin bath (17a) is heated in a melting tank to process temperature, and returned from there to the coating tank (15).

Abstract: A corrosion-resistant coated base metal coated with a corrosion resistant alloy. The corrosion resistant alloy includes tin and zinc. The corrosion resistant coated base metal includes a heat created intermetallic layer primarily including copper and zinc.

Abstract: A method of coating 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: A corrosion-resistant coated brass metal coated with a corrosion resistant alloy. The corrosion resistant alloy is a tin metal alloy or a tin and zinc metal alloy. The corrosion resistant metal alloy may also include one or more metal additives to improve the coating process and/or to alter the properties of the tin or tin and zinc metal alloy.