Abstract: A chemical conversion treatment liquid which can stably form a phosphate-type chemical conversion film on a steel material for a joint portion of an oil well steel pipe containing 0.5-13% Cr is developed. Using a chemical conversion treatment liquid to which a prescribed amount of potassium is added, a chemical conversion film containing a prescribed amount of potassium compounds and having a prescribed thickness can be formed on the threaded surface of a joint portion of an oil well steel pipe.

Abstract: The aim of the present invention is to provide a phosphate treated zinc coated steel sheet with excellent workability. A steel sheet coated with a zinc based alloy has a phosphate treated coating on the surface thereof. The phosphate treated coating comprises mainly granulated crystals, specifically, crystals in which the average ratio of the major axis to the minor axis is not less than 1.00 and not more than 2.90. Moreover, the method for producing the phosphate treated coating uses a phosphate treatment solution in which the amount of Mg ions is ≧6 g/l and the amount of Zn ions is ≧0.5 g/l, or a phosphate treatment solution in which the amount of Mg ions is ≧10 g/l, the amount of Zn ions is 0≦ and <0.5 g/l, and the amount of nitric acid ions is ≧40 g/l.

Abstract: The present invention comprises a method for treating one or more multi-metal articles. The method comprises exposing the one or more articles to a first treatment composition capable of providing a conversion coating on steel- and zinc-based metal, and exposing the one or more articles to a second treatment coating composition suitable for providing a conversion coating on aluminum-based metal articles. Preferably, the first treatment composition comprises a zinc-phosphate conversion coating comprising, zinc ion, phosphate ion, manganese ion, and fluoride ion. Preferably, the second treatment composition comprises a ceramic composite treatment composition.

Abstract: A processing solution for forming a hexavalent chromium free, corrosion resistant trivalent chromate conversion film on zinc or zinc alloy plating layers comprises a silicon compound; trivalent chromium and oxalic acid in a molar ratio ranging from 0.5 to 1.5, wherein the trivalent chromium is present in the form of a water-soluble complex with oxalic acid; and cobalt ions, which form a hardly soluble metal salt with oxalic acid and are stably present in the processing solution without causing any precipitation, wherein the solution reacts with zinc when bringing it into contact with the zinc or zinc alloy plating to form a hexavalent chromium free, corrosion resistant, trivalent chromate conversion film containing zinc, chromium, cobalt, oxalic acid and silicon on the plating. This solution can provide a corrosion resistant trivalent chromate conversion film excellent in the corrosion resistance after heating.

Abstract: The present invention provides increased adhesion between the native oxide surface of a material and adhesive material or tissue by providing a phosphorous-based coating layer comprising a plurality of omega-functionalized organo-phosphonate moieties bonded to the native oxide surface of a substrate by a phosphonate bond and a plurality of one or more coating moieties selected from the group consisting of inorganic, organic, or bioactive moieties, each said coating moiety being bonded to the omega-functional group of at least one omega-functionalized organo-phosphonate moiety by means of a member of the group comprising a metal complex and an organic polymer, and when bonded by means of a metal complex, the metal complex further characterized by being derived from a metal alkoxide reagent, and when bonded by means of an organic polymer, the organic polymer further characterized by being derived from an ionic or step-reaction polymerization which incorporates one or more of said omega-functional groups into sa

Abstract: On the outer surface of a metal pipe 10 there is formed a zinc plating layer 20 having a predetermined thickness by electroplating method. A coating layer 30 predominantly composed of a chromium compound and a phosphoric acid compound is formed by dipping the metal pipe 10 with layers up to the zincplating layer 20 formed thereon in a coating liquid containing chromium (a source of chromium) and at least one substance selected from the group consisting of oxyacid of phosphorus, oxysalt of phosphorus, anhydride of oxyacid of phosphorus, and anhydride of oxysalt of phosphorus. A fluorocarbon resin layer 40 is formed by coating, with polyvinyl fluoride, the metal pipe 10 with layers up to the coating layer 30 formed thereon and baking at a predetermined temperature for a predetermined time.

Abstract: A surface-treated steel sheet includes a steel sheet, an Al—Zn-base alloy plating layer formed on the steel sheet, a chemical conversion film provided on the alloy plating layer, and a concentric layer of a Cr compound that is formed on the alloy plating layer of the chemical conversion film. The surface-treated steel sheet may include a steel sheet, an zinc-base plating layer formed on the steel sheet, and a film that contains chromium and calcium and that is formed on the zinc-base plating layer.

Abstract: A surface treated tin-plated steel sheet which has an alloy layer formed on the surface of a steel sheet, a tin plating layer being formed on said alloy layer with a remaining exposed portion of the alloy layer having an area of 30% or more of that of the alloy layer and, formed on said tin plating layer and said exposed portion of the alloy layer, a coating film containing P and Si in an amount of 0.5 to 100 mg/m2 and 0.1 to 250 mg/m2, respectively; and a chemical treatment solution for use in preparing the steel sheet which comprises a phosphate ion, a tin ion and a silane coupling agent and has a pH of 1.5 to 5.5. The surface treated tin-plated steel sheet is free from chromium which causes problems from an environmental view point, and also is excellent in adhesion with a paint, corrosion resistance after being coated, rust resistance, and formability.

Abstract: The invention relates to a method for producing an ultraphobic surface on aluminium as the supporting material and to the resulting surface and its use. According to said method, the surface of an aluminium support is anodized, especially by anodic oxidation, and/or electrochemically pickled in an acid solution with an alternating voltage, treated in hot water or water vapor at a temperature of 50 to 100° C., optionally coated with an adhesion promoter layer and then provided with a hydrophobic or especially oleophobic coating.

Abstract: A zinc phosphate treated galvanized steel sheet capable of securing sufficient white rust resistance and non-uniform dew condensation resistance without requiring a sealing chromate treatment has high white color and is excellent in color tone uniformity. The galvanized steel sheet has a zinc phosphate film containing at least 2% of Mg and 0.01 to 1% of at least one element selected from the group consisting of Ni, Co and Cu, and the adhesion value of the zinc phosphate film is at least 0.7 g/m2.

Abstract: An improved method of pretreating and electrostatically coating an article made of a material which has little or no conductivity, and the article made therefrom.

Abstract: Ligand-containing coating layers on the surface of hydroxide-bearing substrates comprising transition metal atoms selected from the group consisting of Group IVB, Group VB and Group VIB of the Periodic Chart covalently bonded to the surface hydroxyls of said substrate, wherein each transition metal atom is further covalently bonded to one or more ligands of said coating layer, thereby covalently bonding said coating layer to said substrate. Disclosed ligands include inorganic phosphates and organic phosphonates.

Abstract: An article is fabricated with a ceramic surface having a controllable surface finish. In one form, the ceramic is applied as a coating to a substrate article. Preferably, an aqueous coating mixture of phosphoric acid, alumina powder, and cordierite powder is prepared. The mixture is contacted to the surface of the article, and a mechanical overpressure is applied to the external surface of the mixture using a pressing tool. The surface character of the pressing tool, such as a smooth surface or an intentionally patterned surface, is reproduced on the surface of the final ceramic coating. The coating is heated to a moderate temperature to set the ceramic of the coating, and thereafter the coating is heated to a higher, but still intermediate temperature, to cure the coating.

Abstract: An implant with a surface modified for improved bio-compatiability consisting of a metal or an alloy thereof, said implant surface comprising a modified outer layer is disclosed, wherein said metal preferably is titanium, zirconium, hafnium or tantalum, and most preferably titanium, and said modified outer layer preferably comprises a hydride of said metal. Also a method for the production of such an implant is disclosed.

Abstract: A galvanized steel plate for use in a vehicle body, having corrosion resistance and workability that are well-balanced and being suitable for outer plates of a vehicle body is provided. The plate includes a galvanized steel plate having a zinc coating plated on both surfaces thereof; a zinc phosphate coating layer formed on one of the surfaces of the plate that serves as an outer surface of a vehicle body; and a phosphate-containing composite coating formed on the other of the surfaces that serves as an inner surface of a vehicle body, the composite coating being composed of a zinc phosphate coating layer and a phosphate coating containing Mg. The phosphate-containing composite coating preferably contains 2 wt % or more of Mg, and is preferably applied in an amount greater than or equal to 0.5 g/m2.

Abstract: The present invention provides phosphate-treated galvanized steel sheet excellent in corrosion resistance and paintability, including: a phosphate-treated galvanized steel sheet excellent in corrosion resistance and paintability, comprising a phosphate film in an amount of at least 0.5 g/m2, containing at least 2 wt. % of Mg, and at least 0.5 wt. % in total of Ni and/or Mn, with at least 4 wt. % in total of Mg and Ni and/or Mn, formed on a zinc or zinc alloy plated steel sheet; and a phosphate-treated galvanized steel sheet excellent in corrosion resistance and paintability, comprising a phosphate film in an amount of at least 0.3 g/m2, preferably at least 1 g/m2, containing at least 2 wt. % of Mg, and at least 0.5 wt. % in total of Ni and/or Mn, with at least 5 wt. % in total of Mg and Ni and/or Mn, formed on a zinc or zinc alloy plated steel sheet.

Abstract: There has been invented a chemically bonded phosphate corrosion protection material and process for application of the corrosion protection material for corrosion prevention. A slurry of iron oxide and phosphoric acid is used to contact a warm surface of iron, steel or other metal to be treated. In the presence of ferrous ions from the iron, steel or other metal, the slurry reacts to form iron phosphates which form grains chemically bonded onto the surface of the steel.

Abstract: The present invention relates to a surface-treated steel sheet coated with a chromate layer having excellent corrosion resistance, fuel resistance and seam weldability, and a chromate solution used for preparing the surface-treated steel sheet. Specifically, the chromate solution of the present invention comprises (a) a main solution prepared by adding to a chrome solution having 0.4 to 0.8 of trivalent chrome composition and 7 to 50 g/l of dissolved chrome, on the basis of the chrome in the chrome solution, 50 to 80 w % of phosphate, 20 to 40 w % of fluoric acid, 300 to 2000 w % of colloidal silica, 5 to 15 w % of sulfuric acid, and 25 to 40 w % of sodium phosphate, and (b) a hardener solution containing added epoxy silane or glycidyl silane of 2 to 10 w % on the basis of total hardener solution, the pH of which is controlled between 2 and 3, wherein 10 to 60 w % of the hardener solution being added to the main solution.

Abstract: A coated steel sheet having excellent corrosion resistance comprises: a zinc or a zinc alloy plated steel sheet or an aluminum or an aluminum alloy plated steel sheet; a composite oxide coating formed on the surface of the plated steel sheet; and an organic coating formed on the composite oxide coating. The composite oxide coating contains a fine particle oxide and a phosphoric acid and/or a phosphoric acid compound. The organic coating has thickness of from 0.1 to 5 &mgr;m.

Abstract: A new processed steel sheet comprising of a steel base coated with a Zn or its alloy plating layer and a converted layer, which contains both of at least an insoluble or scarcely-soluble metal compound and at least a soluble metal compound. The insoluble or scarcely-soluble compound may be one or more of valve metal oxides or hydroxides, and the soluble compound may be one or more of valve metal fluorides. The converted layer may be also composed of one or more of complex compounds of Mn and Ti. The insoluble or scarcely-soluble compound acts as a barrier for insulation of a steel base from an atmosphere, while the soluble compound exhibits a self-repairing faculty to repair defective parts of the converted layer. Due to the converted layer, the processed steel sheet is remarkably improved in corrosion resistance, without the presence of chromium compounds which would put harmful influences on the environment.

Abstract: A process for the corrosion protection of steel strips coated with zinc or zinc alloy, characterised in that the steel strips coated with zinc or zinc alloy are brought into contact with an aqueous treatment solution having a pH within the range of from 1.5 to 3.5, which contains 1 to 20 g/l manganese(II) ions and 1 to 150 g/l phosphate ions, and the solution is dried without intermediate rinsing. Optionally the solution may contain in addition: up to 10 g/l zinc ions, up to 10 g/l nickel ions, up to 20 g/l titanium ions, up to 50 g/l silicon ions in the form of silicon compounds, up to 30 g/l fluoride ions, up to 150 g/l of one or more polymers or copolymers of polymerisable carboxylic acids selected from acrylic acid, methacrylic acid and maleic acid, and esters thereof with alcohols having 1 to 6 carbon atoms. The present invention also relates to the correspondingly-treated metal strips.

Abstract: Metal surfaces are protected against corrosion by a coating of molecular sieve, notably a zeolite or a phosphate-containing molecular sieve, rendered substantially non-porous by the retention (or addition) of a pore-filling member inside the voids of the molecular sieve crystal structure. Pore-filling agents convenient for use include species typically used as structure-directing agents in the synthesis of zeolites and other molecular sieves. A further aspect of the invention is a method of protecting a metal surface from corrosion by crystallizing a molecular sieve in situ on the metal surface.

Abstract: A composition for metal surface treatment which comprises an aluminum ion, a magnesium ion, a manganese ion, a water-soluble organic resin, an acid and water; and a surface treated metal material which has been treated with the composition. The resultant surface treated metal material is free from the danger of water contamination owing to chromium, since the composition is free of chromium, and also is excellent in both electrical conductivity and corrosion resistance. Accordingly, the metal material can be used in a wide variety of applications in place of a conventional chromate-treated steel sheet and the like.

Abstract: When a phosphate ester or a dispersed wax is added to a conventional liquid phosphate conversion coating composition, the resulting phosphate coating formed on a metal substrate has a lower coefficient of friction after being oiled than it would have had if the additive had been omitted. The corrosion resistance and paint adhesion properties expected from the conversion coating are not substantially diminished by the additive. Particularly good results are achieved if the phosphate coating composition contains calcium and ferrous cations and the liquid phosphate conversion coating composition is dried into place on the substrate.

Abstract: A highly effective and storage stable conditioning treatment for metal surfaces prior to phosphating them is a suspension in water containing solid miorosize particles of at least one phosphate of a divalent or trivalent metal and an accelerant selected from the group consisting of sacoharides and their derivatives thereof, orthophosphoric acid, condensed phosphoric acids, organophosphonic acids, and polymers of vinyl acetate and/or carboxylic acid. The surface conditioning liquid composition is used simply by effecting contact between the metal and the liquid composition, and can also be used to simultaneously carry out degreasing, particularly when the conditioning liquid also contains nonionic or anionic surfactant.

Abstract: A process for forming an improved anodizing film on the surface of an aluminum alloy material. The film is impregnated with an amorphous substance which fills pores formed in the film during its growth. If the film has a flaw reaching the aluminum alloy material, the amorphous substance and aluminum form a layer of passivity which restrains the corrosion of the aluminum alloy material.

Abstract: An anticorrosion treatment of an aluminium/zinc alloy surface is disclosed. The treatment includes the steps of forming on the alloy surface a coating of a solution which contain 5-40 grams of molybdenum per litre of the solution, 2-19% by volume of a phosphoric acid, and a surface etchant. The treatment also includes drying the coating to form a dried coating having a loading of molybdenum of at least 10 mg/m2 of the dried coating and of phosphorus of at least 15 mg/m2 of the dried coating.

Abstract: The present invention has an object to provide a surface-treated steel sheet which has highly balanced corrosion resistance and formability, and satisfies fundamental properties required mainly for steel sheets for automobile body, and a manufacturing method thereof. The surface-treated steel sheet of the invention is excellent in corrosion resistance and formability, comprising an amorphous inorganic film containing at least 5% magnesium and having a weight within a range of from 0.1 to 2.0 g/m2, formed on the surface of a zinc or zinc alloy plated steel sheet; wherein the inorganic film is soluble in an acidic solution and hardly soluble in a neutral or alkaline solution, and a manufacturing method thereof is provided. A zinc phosphate film may be provided between the galvanized steel sheet and the amorphous inorganic film.

Abstract: A corrosion-resistant article of a magnesium material having the gloss of the metal substrate surface comprises an anodic oxide film formed on the external surface of an article of magnesium or a magnesium alloy, which never changes the gloss of the metal substrate and a colorless or colored transparent electrodeposition coating film on the anodic film. Such an article can be prepared by immersing an article of magnesium or a magnesium alloy in an electrolyte containing a phosphate and an aluminate to thus form an anodic oxide film through anodization of the surface of the article and forming a colorless or colored transparent electrodeposition coating film on the anodic film through electrodeposition coating.

Abstract: In a chromating solution comprising a water-soluble chromium compound and a reducing agent and in which hexavalent chromium ions produced by dissolution of the water-soluble chromium compound have been partly reduced with the reducing agent to trivalent chromium ions, an oxycarboxylic acid compound is used as the reducing agent. This chromating solution causes neither gelation nor sedimentation of the solution even when hexavalent chromium ions are reduced to trivalent chromium ions at a reduction percentage of more than 50%. The chromating solution and a chromate film formed on a steel sheet may also contain an organic resin, phosphoric acid or a phosphoric acid compound, or a silica sol.

Abstract: A galvanized steel sheet includes a galvanized coating layer having a coating weight of from about 20 to about 60 g/m2 formed on at least one surface of the steel sheet, and a zinc phosphate coating layer having a coating weight of from about 0.5 to about 3.0 g/m2 formed on the galvanized coating layer. The zinc phosphate coating layer contains from about 0.5 to about 10.0 percent by weight of magnesium, from about 0.1 to about 2.0 percent by weight of nickel, and from about 0.5 to about 8.0 percent by weight of manganese. However, the manganese content and the nickel content satisfy the following relationship: [Ni]×7.6−10.9≦[Mn]≦[Ni]×11.4 wherein [Mn] represents the manganese content, in percent by weight, and [Ni] represents the nickel content, in percent by weight. This steel sheet exhibits superior perforative corrosion resistance.

Abstract: The coating structure having a corrosion resistance of the invention contains a formation film formed on the surface of an aluminum alloy material. The formation film is subjected to a zirconium phosphate treatment. Because the zirconium phosphate reacts with an oxide film on the surface of the aluminum alloy to form a zirconium boehmite layer and to increase the adhesion of the coating material, a corrosion resisting structure is obtained without need of a sealing treatment while restraining the increase of the product cost. Also, a primer layer is formed on the outer surface of the formation film and the primer layer is composed of phosphomolybdic acid.

Abstract: This invention provides for metal surfaces which when derivatized with &agr;-&ohgr; bis-functionalized substantially linear aliphatic, including fluoroaliphatic acids and metal salts thereof exhibit changes in surface properties. In particular, composites formed from polymers and metallic surfaces derivatized according to a process of the present invention exhibit surprising durability.

Abstract: In a chromating solution comprising a water-soluble chromium compound and a reducing agent and in which hexavalent chromium ions produced by dissolution of the water-soluble chromium compound have been partly reduced with the reducing agent to trivalent chromium ions, an oxycarboxylic acid compound is used as the reducing agent.

Abstract: A method of manufacturing steel wire for reinforcement of rubber articles comprises the steps of passing a wire rod plated with brass, through a group of dies immersed in a lubricant containing phosphate in continuous wet processing, winding the resulting steel wire around a spool, mounting the spool on a pay of unit of a twister assembly, and drawing the steel wire by the use of one or more dies arranged between the pay of unit and twisting unit of the twister assembly and having an area reduction per die of at least 5%, to reduce the diameter of the steel wire. Phosphor compound in the coating film formed on the brass plating of the steel wire contains phosphor in the range of 0.2 to 0.9 mg/m2 and zinc oxide in the range of 20.0 to 70.0 mg/m2. Also, provided is a steel cord which comprises twisted steel wires.

Abstract: Surface treated metal materials with corrosion-resistant coating layers composed mainly of oxyacid compounds of rare earth elements (lanthanum, cerium, etc.) or Group IVA elements (zirconium, etc.), oxyacids or mixtures thereof. The corrosion resistant coating layers may also contain resins. Also provided are corrosion resistant coating layers containing rare earth element and Group IVA element compounds in resin matrixes. The corrosion resistant coating layers, particularly inorganic layers, may be covered with resin layers.