Abstract: Disclosed is an aqueous solution of a chromium salt, in which the oxalic acid content is 8% by weight or less relative to chromium. In the aqueous solution of the chromium salt, the total organic carbon content is 4% by weight or less relative to chromium. The chromium salt is preferably a chromium chloride, a chromium phosphate, or a chromium nitrate. The chromium chloride preferably contains a basic chromium chloride represented by the composition formula Cr(OH)xCly (wherein 0<x?2, 1?y<3, and x+y=3). The chromium phosphate is preferably one represented by the composition formula Cr(H3?3/nPO4)n (wherein n is a number satisfying 2?n?3). The chromium nitrate is preferably a basic chromium nitrate represented by the composition formula Cr(OH)x(NO3)y (wherein 0<x?2, 1?y<3, and x+y=3).

Abstract: An elastomer agent coating combines silicone base compound ingredients for viscose mass, curing agents, and metallic coloring powders. It may be diluted or thickened depending on solvent agents. Metallic powder coloring ingredients are used in a plurality of shades in various combinations to produce alternately semi-transparent coatings, clear coatings, and solid color coatings in different shades and colors. Color additives are used to create a multi-variety of singular color appearance to detect uncoated areas to assist in creating a monolithic impenetrable even coat. Evaporable solvents lower viscosity and thicken the coating so it may be applied using brushes, rollers, and airless spray equipment to achieve a desired thickness in one coat.

Abstract: It is an object of the present invention to provide a pretreatment method for coating, which does not limit a coating method, places a less burden on the environment and can apply good chemical conversion treatment to all metals such as iron, zinc, aluminum and so on. A pretreatment method for coating comprising treating a substance to be treated by a chemical conversion coating agent to form a chemical conversion coat, wherein the chemical conversion coating agent comprises: at least one kind selected from the group consisting of zirconium, titanium and hafnium; fluorine; and at least one kind selected from the group consisting of amino group-containing silane coupling agents, hydrolysates thereof and polymers thereof.

Abstract: A method for the surface treatment of aluminum or an aluminum alloy which comprises soaking aluminum or an aluminum alloy in a treating fluid containing ammonium silicofluoride and another aluminum-free fluorine compound to form a film thereon, wherein the treating fluid comprises an aqueous solution further containing at least one substance selected from the group consisting of aluminum fluoride, aluminum hydroxide, aluminum silicate, magnesium aluminate metasilicate and powdered aluminum.

Abstract: A treatment solution that is used to form a chemical coating of trivalent chromium free of hexavalent chromium having uniform black appearance and good corrosion resistance on the surface of zinc or zinc alloy and that attains prolongation of treatment bath lifetime; and a method of forming a black trivalent chromium chemical coating on the surface of zinc or zinc alloy. There is provided a treatment solution for forming of a black trivalent chromium chemical coating on zinc or zinc alloy, comprising trivalent chromium ions, a chelating agent capable of forming a water-soluble complex with trivalent chromium, zinc ions, a sulfur compound and phosphite ions.

Abstract: The invention relates to an aqueous solution of modified silicates, wherein the solution is free of organic solvents and is obtained by reacting (a) an initially charge aqueous solution of silicates of the general formula M2O.nSiO2, wherein M is a cation from the group Li+, Na+, K+, NY4+, where Y is a hydrogen atom and/or an alkyl or alkenyl radical having 1 to 22 C atoms, and (b) at least one silane of the general formula R—(CH2)n—Si—(X)3 where X is independently a CH3, OCH3, OC2H5, OC3H7, OCOCH3, H or Cl radical, and R is a saturated or unsaturated, linear or branched or ring-shaped radical having at least one O and/or N atom and at least 2 C atoms, and n is a number between 1 and 3; at temperatures from 5 to 100° C., and wherein the alcohols arising from the conversion are subsequently removed. The aqueous solution of modified silicates is used to hydrophilize surfaces, particularly for high-temperature coatings.

Abstract: A chrome-free corrosion inhibitor composition includes: titanium chloride; a stabilizer including a mixture of hydrogen peroxide and at least a compound selected from nitric acid, persulfate, nitrate, and chlorate; and a film-forming enhancer selected from monosaccharide, oligosaccharide, polysaccharide, derivatives of saccharide, and combinations thereof.

Abstract: Provided is a chromium-free, low-temperature curable, metal-surface treatment composition comprising 5 to 30 parts by weight of a silane compound having an epoxy group and a silane compound having an amino group or a hydrolytic condensate thereof; 0.1 to 5 parts by weight of a vanadium compound; 0.1 to 5 parts by weight of a magnesium compound; 1 to 10 parts by weight of organic/inorganic acids; 0.05 to 2 parts by weight of a crosslinking accelerating and coupling agent; 0.01 to 1 part by weight of an antifoaming agent; 1 to 2 parts by weight of a wetting agent; and the balance of water and ethanol, based on 100 parts by weight of the total solution. In addition, a steel sheet coated with the above-described metal-surface treatment composition is low-temperature curable and provides anticorrosiveness while containing no chromium components.

Abstract: A waterborne corrosion resistant primer composition is composed of a waterborne resin system; an optional curing agent; and a non-chromate containing corrosion inhibiting additive. The non-chromate corrosion inhibiting additive includes at least one of an anodic corrosion inhibitor, a cathodic corrosion inhibitor and a metal complexing agent. The metal complexing agent increases the solubility of at least one of the anodic and cathodic corrosion inhibitors.

Abstract: A vanadate solution for conversion treating of surface of a magnesium alloy workpiece contains 8.20×104 to 8.20×10?2 mol/liter of metavanadate ion, 1.18×104 to 1.18×10?2 mol/liter of a polyhydroxylated aromatic compound, and balance of water. The pH value of the vanadate solution exceeds 1 and is less than 4. A method for preparing the vanadate solution is also provided.

Abstract: A method of manufacturing a surface treated oil well pipe comprising performing chemical conversion treatment on an oil well pipe having a steel composition containing 0.5-13% Cr using a chemical conversion treatment liquid containing zinc and phosphoric acid or manganese and phosphoric acid and further containing potassium tetraborate to form a chemical conversion film of a zinc-phosphate type or a manganese phosphate type, wherein the chemical conversion treatment is carried out in the absence of fluoride ions.

Abstract: A surface conditioning composition is provided in which a titanium phosphate compound can be stored in the state of a dispersion liquid for a long period of time while being stably present in the dispersion liquid, with favorable stability also in the bath, and with the composition being capable of forming a conversion coating film in a sufficient amount of the film even in the case of application to conversion resistant metal materials such as high-tensile steel sheets.

Abstract: Process for the passivation of metallic surfaces, in particular of strip metals, by treatment of the surface with an acidic, aqueous preparation which comprises at least one water-soluble acid group-containing polymer and at least one wax.

Abstract: The present invention relates to a passivating layer on a metal surface, obtainable by contacting the metal surface with a composition comprising a water-soluble nitrogenous polymer, to a surface composed of a metal surface and the passivating layer of the invention, to a process for forming a passivating layer on a metal surface, to the use of a composition comprising a water-soluble nitrogenous polymer to passivate a metal surface, and to a system on a metal surface that comprises a passivating layer of the invention and further coating films.

Abstract: An aqueous metal treatment composition designed to improve adhesion and corrosion resistance of the metal surface includes an organofunctional silane in combination with a fluorozirconic or fluorotitanic acid, methanesulfonic acid and nitric acid. The methanesulfonic acid acts to reduce sludge formation. Preferably, the composition also includes a fluorosilicic acid which likewise reduces sludge and improves corrosion resistance.

Abstract: A method for producing coloured layers on zinc, aluminium, magnesium or alloy surfaces. The surfaces are brought into contact with an aqueous treatment solution which is devoid of chrome, said solution containing, in total, 3-35 g/l persulfate ions and/or peroxodisulfate ions and not more than 10 g/l ammonia or ammonium ions, it has a pH value in the region of between 10-12 and a temperature in the range of between 30-80 ° C. The surfaces are brought into contact with the treatment solution for a period in the region of 0.5-5 minutes and optionally, they are covered with a coating based on organic polymers. The invention further relates to metal parts treated according to said method.

Abstract: A composition for surface treatment of aluminium, aluminum alloys, magnesium or magnesium alloys and the treating solutions being diluted to the desired concentration are defined. The composition contains (1) compound A containing at least one metal element selected from the group consisting of Hf(IV), Ti(IV) and Zr(IV), (2) a fluorine-containing compound of sufficient amount to make fluorine exist in the composition in an amount of at least 5 times the molarity of the total molarity of the metal contained in the above-mentioned compound A, (3) at least one metal ion B selected from the group of alkaline earth metals, (4) at least one metal ion C selected from the group consisting of Al, Zn, Mg, Mn and Cu, and (5) nitric ion and the mol concentration of compound A is 0.1-50 mmol/L as the metal element of Hf(IV), Ti(IV) and Zr(IV). A metal treated with the treating method of the present invention solution has an excellent resistance to various corrosive environments.

Abstract: The invention provides a method and composition for coating a ferrous metal surface with a zirconium/vanadium conversion coating which is substantially free of an organic film forming composition and tannins. The method is a low temperature method which contemplates an aqueous conversion coating composition which is low in phosphates and which comprises zirconium, vanadium, fluoride, as well as phosphate ions in a ratio and a concentration effective for providing a conversion-coated ferrous metal surface.

Abstract: This invention comprises an acidic aqueous solution for treating metal substrates to improve the adhesion bonding and corrosion protection of the metal surface which comprises effective amounts of water soluble trivalent chromium compounds, fluorozirconates, effective amounts of at least one corrosion inhibitors such as benzotriazole, fluorometallic compounds, zinc compounds, thickeners, surfactants, and at least about 0.001 mole per liter of the acidic solution of a polyhydroxy and/or carboxylic compound as a stabilizing agent for the aqueous solution.

Abstract: A metal surface treatment composition including at least one compound selected from the group consisting of a zirconium compound and a titanium compound, and an organosiloxane, which is a polycondensate of organosilane and has in a molecule thereof of at least two amino groups, in which the Degree of polycondensation of the organosiloxane is at least 40%, the content of at least one compound selected from the group consisting of the zirconium compound and the titanium compound is predetermined content, the content of the organosiloxane in the metal surface treatment composition is predetermined content, and the mass ratio of at least one element selected from the group consisting of the zirconium element and the titanium element contained in the zirconium compound and the titanium compound, respectively, to the silicon element contained in the organosiloxane is a predetermined ratio.

Abstract: Coatings and methods are provided. An embodiment of the coating includes microcapsules that contain at least one of a corrosion inhibitor, a film-forming compound, and an indicator. The microcapsules are dispersed in a coating vehicle. A shell of each microcapsule breaks down in the presence of an alkaline condition, resulting from corrosion.

Abstract: An organic solderability preservative (OSP) composition comprising an alkyl cyclic alcohol and an azole compound having enhanced composition stability against crystallization of the azole compound.

Abstract: A surface treatment method for solder joint employs alkali buffer solution dipping the solder joint and the alkali buffer solution reacts with the solder joint thus yielding a passive layer. As the resultant passive layer forms on the surface of the solder joint, thereby prevents further corrosion and dissolution during aqueous cleaning or water dipping thereafter. In addition, the passive layer ensures a good appearance with maximum protection of the solder joint and also provides a sound reliability and a high testability of a finished electronic product equipped with the solder joint.

Abstract: A corrosion-inhibiting composition for application to a metal substrate, such as aluminum or steel, and in connection with a paint, and the synthesis of the composition. The active inhibitor constituent of the composition can be selected from the group consisting of 2,5-dimercapto-1,3,4 thiadiazole (DMTD), 2,4-dimercapto-s-triazolo-[4,3-b]-1,3-4-thiadiazole, trithiocyanuric acid (TMT), and derivatives of DMTD and TMT, including various N— or S— and N, N—, S— and N—,S-substituted derivatives of DMTD, including salts of DMTD of the general formula: M(DMTD)n, where n=1,2 or 3, and M is a metal cation and preferably M=Zn(II), Bi(III), Co(II), Ni(II), Cd(II), Pb(II), Ag(I), Sb(III), Cu(II), Li(I), Ca(II), Sr(II), Mg(II), La(III), Ce(III), Pr(III), Al(III) or Zr(IV). DMTD, TMT, and their derivatives may also be combined with phosphates, molybdates, borates, silicates, tungstates, phosphotungstates, phosphomolybdates, cyanamides, carbonates, SiO2 and mixtures thereof.

Abstract: A protective coating is formed on a metallic material surface by applying a treating agent comprising water, an alkali silicate, and, optionally, a lubricating component to the surface and drying the treating agent. The coating film thereby formed has excellent anti-galling and rust preventive properties. If a lubricating component is present, the coating film also has excellent self-lubricating properties.

Abstract: Disclosed is an aqueous solution of a chromium salt, in which the oxalic acid content is 8% by weight or less relative to chromium. In the aqueous solution of the chromium salt, the total organic carbon content is 4% by weight or less relative to chromium. The chromium salt is preferably a chromium chloride, a chromium phosphate, or a chromium nitrate. The chromium chloride preferably contains a basic chromium chloride represented by the composition formula Cr(OH)xCly (wherein 0<x?2, 1?y<3, and x+y=3). The chromium phosphate is preferably one represented by the composition formula Cr(H3-3/nPO4)n (wherein n is a number satisfying 2?n?3). The chromium nitrate is preferably a basic chromium nitrate represented by the composition formula Cr(OH)x(NO3)y (wherein 0<x?2, 1?y<3, and x+y=3).

Abstract: The ferrous metal chemical conversion coating is comprised of mixed oxides and organometallic compounds of aluminum and iron. A ferrous metal substrate is immersed for a period of time in a bath composition, at a temperature, at a pH, and at a concentration for each constituent of the bath composition, that will form a coating with the desired characteristics. The bath composition comprises water, aluminum salt, oxalic acid, and an oxidizer. The conversion coating is amorphous in nature and can be formed as thin as 1 micron with a coating weight in the range of about 40-250 milligrams per square foot. When sealed with an appropriate rust preventive material, the coating enhances corrosion resistance of the ferrous metal substrate. It is an effective absorbent base for paint finishes. When top coated with a lubricant, the conversion coating aids (a) assembly of parts, (b) break-in of sliding surfaces, and (c) anti-galling.

Abstract: A baking finishing formula comprise metallic zinc, metallic nickel, metallic aluminum, polyethylene glycol, a silane, fluoride-containing surfactants, corrosion inhibitors and a mixed-type additive.

Abstract: A liquid coating composition including a coating vehicle and composite powder particles disposed within the coating vehicle. Each composite powder particle may include a magnesium component, a zinc component, and an indium component.

Abstract: The present invention is the method for surface treatment of a metal material containing iron and/or zinc, containing component (A) and component (B); where (A) is a compound containing at least one metal element selected from the group consisting of Ti, Zr, Hf and Si, (B) is a compound containing fluorine as a supplying source of HF, wherein the ratio K=A/B between the total mole weight A of metal elements of Ti, Zr, Hf and Si in the compound of component (A) and the mole weight B which when the total fluorine atoms in the fluorine-containing compound of component (B) is converted to HF is within the range of 0.06?K?0.18, and the concentration of component (A) indicated by the total mole concentration of metal elements of Ti, Zr, Hf and Si is within the region of 0.05 to 100 m mol/L. To the treating solution for surface treatment, at least one compound containing at least one metal element selected from the group consisting of Ag, Al, Cu, Fe, Mn, Mg, Ni, Co and Zn can be blended.

Abstract: The present invention disclosure provides a chemical conversion coating agent which places a less burden on the environment and can apply good chemical conversion treatment to all metals such as iron, zinc and aluminum, and a surface-treated metal obtained using the same.

Abstract: A corrosion inhibiting mixture is disclosed comprising a carrier, a volatile corrosion inhibitor and a tracing agent which absorbs light in the ultraviolet and violet region of the electromagnetic spectrum, and re-emits light in the blue region of the electromagnetic spectrum.

Abstract: The ferrous metal chemical conversion coating is comprised of mixed oxides and organometallic compounds of aluminum and iron. A ferrous metal substrate is immersed for a period of time in a bath composition, at a temperature, at a pH, and at a concentration for each constituent of the bath composition, that will form a coating with the desired characteristics. The bath composition comprises water, aluminum salt, oxalic acid, and an oxidizer. The conversion coating is amorphous in nature and can be formed as thin as 1 micron with a coating weight in the range of about 40-250 milligrams per square foot. When sealed with an appropriate rust preventive material, the coating enhances corrosion resistance of the ferrous metal substrate. It is an effective absorbent base for paint finishes. When top coated with a lubricant, the conversion coating aids (a) assembly of parts, (b) break-in of sliding surfaces, and (c) anti-galling.

Abstract: A non-toxic corrosion inhibitor and method comprising hydrotalcite or a hydrotalcite-like complexing agent and one or a combination of an organic or inorganic corrosion inhibitive complexing agent, provides improved corrosion protection on metal substrates and utilizes synergistic corrosion inhibitive mechanisms.

Abstract: It is an object of the present invention to provide an organic coating-treated metal sheet, having a coat capable of satisfying all the corrosion resistance, alkali resistance, solvent resistance, anti-scratch property and adhesion requirements which the conventional nonchromate type coating technologies have been difficult to meet. A surface-treated metal sheet with a coat comprising 50; to 90% by weight of a crosslinked resin matrix (A) and 10 to 50% by weight of an inorganic rust preventive (B) as formed on the metal sheet surface, wherein the crosslinked resin matrix (A) is formed by the reaction between a water-borne resin and a crosslinking agent and has an acid value of 0 to 30 due to carboxylic acid groups not neutralized by an alkali metal and a hydroxyl value of 5 to 50.

Abstract: Autodeposition of a coating containing an epoxy resin is accomplished over a metal substrate that has been coated with a zinc phosphate conversion coating without significant removal of the zinc phosphate conversion coating.

Abstract: An electrical connection for a trailer hitch on a vehicle joins a trailer electrical connection. These electrical connectors join together to carry the power to illuminate the trailer lights on the trailer and carry out other functions. Both connections are protected by a protective gel for the electrical connections having a thickening agent, a cleaning agent, a chelating agent, a reducing agent, anti-corrosive agent, a buffer, and an antifreeze agent.

Abstract: A conversion coating composition for coating a metal substrate is provided which imparts corrosion resistance to the underlying metal substrate. The conversion coating composition comprises an aqueous carrier and first and second rare earth element salts. A complete coating system employing the conversion coating composition is also provided as well as methods for conversion coating a metal substrate with the rare earth element conversion coating compositions of the present invention.

Abstract: A water treating agent is constituted by blending water as a main component with a coating film forming agent of which a coating film is formed on the heat transfer surface of a boiler tube, a oxygen scavenger, a scale inhibitor, and a pH adjustor in such a manner that the general corrosion and local corrosion of the heat transfer surface of the boiler tube can be prevented and excellent heat transfer property can be obtained. The water treating agent is injected into boiler feed water to perform the prevention of the corrosion of the heat transfer surface of the boiler tube and the suppression of the scaling of the heat transfer surface in a balanced manner. Thus, a coating film capable of suppressing corrosion is formed of the coating film forming agent on the heat transfer surface of the boiler tube. Dissolved oxygen in boiler feed water is removed by the oxygen scavenger.

Abstract: Rinsing or sealing solutions comprising a rare earth element and a valence stabilizer for barrier films. The treated films contain a rare earth/valence stabilizer complex. The rare earth element is selected from cerium, praseodymium, terbium, or combinations thereof, and at least one rare earth element is in the tetravalent oxidation state. The rinsing or sealing solution may also contain an optional preparative or solubility control agent. The oxidized rare earth element is present in the coating in a “sparingly soluble” form. The valence stabilizers can be either inorganic or organic in nature. A number of rare earth/valence stabilizer combinations that match the performance of conventional hexavalent chromium systems are presented.

Abstract: Conversion coatings comprising a rare earth element and a valence stabilizer combined to form a rare earth/valence stabilizer complex are described for substrate metals. The rare earth element is selected from cerium, praseodymium, terbium, or combinations thereof, and at least one rare earth element is in the tetravalent oxidation state. The coating bath may also contain a preparative or solubility control agent. The oxidized cerium, praseodymium or terbium is present in the coating in a “sparingly soluble” form. The valence stabilizers can be either inorganic or organic in nature. A number of cerium, praseodymium, or terbium/valence stabilizer combinations are presented that can equal the performance of conventional hexavalent chromium systems.

Abstract: An ink composition that includes a self-dispersing pigment that has about 0.02 to about 1.0 mMoles of S and about 0.2 to about 2.0 mMoles of active hydrogen per gram of pigment, water, and an organic solvent. A method of making an ink composition that includes sulfonating a pigment, subsequently oxidizing the pigment to produce a modified pigment, and incorporating the modified pigment into an ink.

Abstract: A non-carcinogenic corrosion inhibiting additive includes an anodic corrosion inhibitor and/or a cathodic corrosion inhibitor and a solubility enhancer for the inhibitors in the form of a metal complexing agent.

Abstract: A coating composition comprising an aqueous mixture containing acid-stable particles and one or more fluoroacids. The amount of the acid-stable particles in the coating composition is from 0.005% to 8% by weight on a dry weight basis. The acid-stable particles can be selected from aluminum-modified silica particles, nonaluminum-modified silica particles, and organic particles selected from anionically stabilized polymer dispersion particles. The invention is also directed to a coating on a metal substrate. The coating contains acid-stable particles attached to the metal substrate through a metal-oxide matrix. The metal-oxide matrix comprises a metal selected from titanium, zirconium, silicon, hafnium, boron, aluminum, germanium, or tin.

Abstract: Alkyl-substituted hydroxylamines are useful as aids in the phosphating of metal substrates. In particular, the rate of phosphating and the rate at which manganese compounds are dissolved into aqueous phosphoric acid solutions may be accelerated by alkyl-substituted hydroxylamines.

Abstract: A corrosion-inhibiting pigment comprising a rare earth element and a valence stabilizer combinded to form a rare earth/valence stabilizer complex. The rare earth element is selected from cerium, terbium, praseodymium, or a combination thereof, and at least one rare earth element is in the tetravalent oxidation state. An inorganic or organic material is used to stabilize the tetravalent rare earth ion to form a compound that is sparingly soluble in water. Specific stabilizers are chosen to control the release rate of tetravalent cerium, terbium, or praseodymium during exposure to water and to tailor the compatibility of the powder when used as a pigment in a chosen binder system. Stabilizers may also modify the processing and handling characteristics of the formed powders. Many rare earth-valence stabilizer combinations are presented that can equal the performance of conventional hexavalent chromium systems.

Abstract: A corrosion inhibiting mixture comprising (A1) corrosion-inhibiting pigments, (A2) amorphous silica modified with metal ions, and (A3) at least one compound of the general formula I: Mn(X)m??(I) in which the variables and indices have the following meanings: M is at least one central atom selected from the group of Lewis acceptors, X stands for Lewis donor ligands having at least one bridging atom selected from elements of main groups 5 and 6 of the periodic table of the elements, n is from 1 to 500, and m is from 3 to 2000; coating materials comprising said mixture and their use as coil coating materials.

Abstract: Metallic surfaces are coated with an aqueous, acidic phosphate solution containing 10 to 60 g/l zinc, 0.5 to 40 g/l manganese, 50 to 300 g/l phosphate ions calculated as P2O5, and optionally other components.

Abstract: A composition for sealing at least one fluid leak in heat exchange systems comprises at least one solvent, and fibrillated fiber in an amount and of a size sufficient to become entrained in and seal the one leak. At least one corrosion inhibitor is present in an amount sufficient to aid in prevention of corrosion of at least two metals. The corrosion inhibitor is compatible with coolants having organic acid corrosion inhibiting agents therein, and with coolants having silicate corrosion inhibiting agents therein.

Abstract: The invention relates to a composition and method for treating a magnesium alloy. The inventive composition comprises an acid aqueous solution containing niobium pentoxide, a water-soluble cerium salt and, optionally, a zirconium salt and/or hydroflouric acid. Said method consists in submerging a magnesium alloy part in said composition. The invention can be used to protect magnesium alloy parts against corrosion.