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7341677 |
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.
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7037384 |
A composition for treating the surface of a ferrous metal. The composition comprises aluminum sulfate, boric acid or a boric acid precursor, and polycarboxylic acid or salt thereof. Treatment of the ferrous metal with an aqueous solution...
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6834667 |
In a fuel injection valve, an adjustment pipe made of stainless steel and for adjusting a compression amount of a spring biasing a valve member is press-fitted into a cylindrical housing made of stainless steel, and a fuel injection amou...
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6558480 |
A conversion coating that does not substantially diminish the luster of a metal surface on which it is coated nor impair adhesion to the surface of lacquers and printing inks commonly used on beverage containers may be provided by contac...
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6482273 |
The invention relates to a method for preparing workpieces suitable for phosphatizing for chipless cold forming by acid pickling, rinsing, drying and treatment with acid reaction lubricants containing phosphate ions. According to said me...
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6309476 |
This invention is a method for forming a chemical conversion coating on ferrous metal substrates, the chemical solutions used in the coating and the articles coated thereby. By modifying and combining the features of two existing, but he...
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6153021 |
A brazing material comprising a mixture of aluminum brazing powder (i.e. Si, Zn, Cu or Ge), flux, binder, and alcohol for diluting the binder is coated on a surface of an extruded flat tubed strip of aluminum type and this and aluminum t...
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5935656 |
A process for sealing anodized metal surfaces is characterized by bringing the anodized metal into contact with an aqueous solution at a temperature from 75° C. to the boiling point of the solution for a time equal to from 0.5 to 2 minu...
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5935348 |
Aqueous acid treatment solution for the treatment of beverage cans, in particular of aluminum, for producing a corrosion-protective, friction-reducing coating which improves the ability to be enameled, which comprises 0.14 to 2.25 mmol/l...
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5928441 |
A hot rolling method of steel products comprises rolling steel products while forming a film of an oxalate (such as iron oxalate, calcium oxalate and the like) on the roll surfaces which have contact with the steel products to be rolled ...
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5916379 |
Disclosed herein are a composition comprising an aqueous solution of a gluconate salt and a citrate salt for treatment of a ferrous metal surface, and a method of application of such a composition for the protection of the ferrous metal ...
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5795661 |
A method for improving the formability of zinc coated steel sheet, and the product produced therefrom. The steps of the method include applying to the zinc coating an oxalic acid solution in an amount that will form a zinc oxalate film h...
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5723183 |
The invention is the chemical composition and method for forming a chemical conversion coating on ferrous metal surfaces and subsequent coloring of said conversion coating through the application of a water-soluble dye. The conversion co...
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5628839 |
Components of apparatus for film making and method for manufacturing the same include components made from aluminum alloy or aluminum without or with uneven surface of unevenness size of up to several mm, which are immersed in any one of...
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5624712 |
Aluminum surfaces are protected with increased corrosion resistance by anodize, and sealing with a liquid fatty acid free of flammable solvents, suitably in the presence of a heterocyclic aromatic azole treating agent where the aluminum ...
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5385616 |
A method for inhibiting corrosion of a metal surface bearing a corrosion product including ferrous ions is disclosed. The method comprises applying to the surface a reaction product of an alcohol and a fatty acid maleic anhydride adduct ...
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5368655 |
There is described a process for chromating an article formed of a metal selected from the group consisting of zinc, cadmium and alloys thereof, which includes immersing the article in a water solution of a soluble chromic oxalate comple...
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5350467 |
A method of heat treating e.g. an end zone of each of a plurality of metal articles such as fasteners comprises the steps of feeding each of the plurality of articles onto a conveyor means by which the articles are conveyed in succession...
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5344504 |
An aqueous coating solution for zinc containing metals such as galvanized iron and steel. The coating solution is resistent to the formation of zinc induced sludge and can be operated with little or no overflow. The aqueous treatment sol...
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5338375 |
A method for inhibiting the corrosion of metals exposed to aqueous mixtures of sulfuric acid and hydrocyanic acid by the use of iron salts.
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5275671 |
There are provided improved aqueous chemical cleaning compositions for removing organic and inorganic combustion residues from steel products, said compositions meeting the hydrogen embrittlement potential test criteria set forth in ANSI...
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5169458 |
Corrosion resistance of anodized aluminum surfaces is improved by conditioning the surface with a low molecular weight (2-7 carbon atoms) alcohol, and sealing the surface with long chain (10-24 carbon atom) carboxylic acid at low tempera...
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5112414 |
Effective, titanium-free agents for activating metal surfaces prior to phosphating these surfaces with phosphating baths containing zinc ions can be made by reacting alkali metal phosphates with 1,1-diphosphonic acids and their alkali me...
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5047095 |
By using an aqueous solution containing a phosphoric acids or phosphate salts together with carboxylic acids containing at least two carboxyl groups per molecule along with conventional mass finishing, a wide variety of metal parts may b...
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4906327 |
A composition for use in the vibratory mass finishing of magnetic stainless steel objects contains oxalic acid, sodium m-nitrobenzene sulfonate, and sodium thiocyanate, the latter two compounds being present in specified rations to one a...
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4761188 |
A filiform corrosion-resistant primer coating composition for use in application to a metallic substrate, comprising a film forming component containing a film-forming resinous material and a hydrotalcite component, characterized in that...
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4717431 |
Nickel-free aqueous phosphating compositions containing zinc ions, cobalt ions, phosphate ions, and at least two additional cations; methods for using such composition, and products of the methods.
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4705594 |
A composition for use in the mass finishing of metal surfaces of objects, normally in a vibratory finishing process, utilizes the combination of oxalic acid, sodium nitrate, and hydrogen peroxide. The maximum concentration of the latter ...
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4690715 |
The use of modifiers such as disulfides and phosphines is particularly effective in modifying the properties of metals such as noble metals and silver. For example, disulfides are useful for modifying the properties of gold and silver wh...
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4518440 |
Passivated (corrosion resistant) stainless steel surfaces for spinnerets, pack parts, filter media, meter pumps, transfer lines, and the like are achieved by oxidizing the surface in an oxidative atmosphere and subsequently soaking the p...
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4509992 |
A composition for forming paint-base coatings on aluminum comprising an aqueous solution having a pH of from about 9 to about 12.5 and containing an effective coating forming amount of a complexing agent which has at least one of a nitro...
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4354881 |
A steel stock such as hot-rolled pickled steel plate, cold-rolled steel plate, cast iron or the like is subjected to antirust treatment with an aqueous solution or an emulsion consisting mainly of a 1-hydroxybenzotriazole compound repres...
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4349390 |
Improved method of producing adherent metallic coatings on articles made from magnesium is disclosed. The articles are exposed to a two-step surface activating prior to chemical precipitation of zinc deposit. The first activating is carr...
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4318754 |
A surface treatment method for tin-free steel, which comprises applying a water solution, containing a polymer obtained from one or two or more kinds of monomers of unsaturated carboxylic acids, on to the surface of a steel sheet having ...
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4316752 |
The surface of a metal, namely, carbon steel (automotive steel), galvanized steel and/or aluminum, can be modified by treating the metal surface with a dilute aqueous oxalic acid solution. The resultant oxalic acid treated metal surface ...
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4298404 |
Substrates, especially those having plated metal surfaces, and subjected to passivation treatments in baths that incorporate one or more film-forming agents at least one of which does not require chromium and includes anions or cations o...
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3969152 |
A final rinse for conversion coated metal surfaces comprising an aqueous acidic solution of a salt of a rare earth metal is disclosed. The rinse of the present invention not only yields coatings having excellent corrosion resistance and ...
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3917464 |
Improved electroless deposits of cobalt-boron which find particular use in protecting basis metals against corrosive attack, the deposits being prepared from an acid bath having the following preferred composition:
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3909313 |
A method for forming on an electrical steel sheet an electric insulating film having excellent punching property and heat resistance comprising coating on the steel sheet a treating solution comprising a composition composed of one or mo...
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3893872 |
Treatment of as-rolled foil, first with oxalic acid and thereafter with heating.
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3879237 |
Coatings that facilitate the cold mechanical deformation of stainless steels and particularly of low-iron noble alloys are applied by contacting the metals with an acidic aqueous oxalate coating solution comprised of a solution of oxalic...
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3849208 |
White, opaque conversion/organic coatings on aluminum structural elements are obtained by altering the element surface by reaction with halide activated moderately acidic polycarboxylic acid solution, and coating the altered surface with...
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3743547 |
Improved processes for applying aluminum coatings on substrates wherein aluminum is applied to the surface of the substrate and the aluminum surfaced substrate is then heated to a temperature in the range of 350°-450° C with adjacent a...
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3720547 |
A final rinse for conversion coated metal surfaces comprising an aqueous acidic solution of permanganate ions having a normality in the range from about 0.0001 to about 2.0 N is disclosed. The rinse of the present invention not only yiel...
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3632452 |
Oxalate conversion coating method for stainless steel suitable for cold-working thereof which is characterized in that stannous salt is added into the treating solution consisting of principal agent of oxalic acid and/or oxalates, activa...
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3547711 |
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3535166 |
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3522062 |
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3519495 |
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3516876 |
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