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| Number | Title | Issue Date |
| 7964044 | Ferrous metal magnetite coating processes and reagents A process for forming a magnetite coating on a ferrous metal surface and for chemical reagents used to implement the coating process. The process comprises the step of making the ferrous metal surface more reactive by contacting the surface with an activating reagen... | 06/21/2011 |
| 7749337 | Method for the passivation of metal surfaces with polymers containing acid groups Process for the passivation of metallic surfaces by treatment of the surface with an acidic, aqueous preparation which comprises at least one water-soluble acid group-containing polymer and Zn, Ca, Mg or Al ions, said process being in particular a continuous process... | 07/06/2010 |
| 7368047 | Method of preparing copper plating layer having high adhesion to magnesium alloy using electroplating Disclosed is a method of preparing a copper electroplating layer having high adhesion to a magnesium alloy, which is advantageous because the usability of the magnesium alloy, having the highest specific strength among actually usable metals, can be increased throug... | 05/06/2008 |
| 7341677 | Non-carcinogenic corrosion inhibiting additive 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. ... | 03/11/2008 |
| 7204871 | Metal plating process A process for forming a coating on a metal substrate includes contacting the substrate with a molybdate solution having a pH of between 3.5 and 5 inclusive containing an acid with the proviso that the acid is not nitric acid. The substrate is contacted with the solu... | 04/17/2007 |
| 7037384 | Lubricating chemical coating for metalworking 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 of the composition at elevat... | 05/02/2006 |
| 7029541 | Trivalent chromate conversion coating In a preferred embodiment of the present invention, a conversion coating composition comprising chromium (III) ions, cobalt (II) ions, and nitric acid is provided. The coating composition is substantially free of chromium (VI) ions and substantially free of an oxidi... | 04/18/2006 |
| 6923153 | Piston and connecting rod assembly having phosphatized bushingless connecting rod and profiled piston pin The present invention relates to a connecting rod and piston pin assembly for an internal combustion engine to improve wear of the piston/connecting rod pivot point and reduce deformation of the pin bore. To this end, the assembly includes a piston having a pin bore... | 08/02/2005 |
| 6834667 | Adjustment pipe for fuel injection valve, and press-fitting structure and press-fitting method for the same 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 amount is adjusted by adjusting a... | 12/28/2004 |
| 6558480 | Process and composition for conversion coating with improved heat stability 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 contacting the metal sur... | 05/06/2003 |
| 6482273 | Preparation of workpieces for cold forming 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 method the workpiece... | 11/19/2002 |
| 6309476 | Composition and method for metal coloring process 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 heretofore unrelated... | 10/30/2001 |
| 6153021 | Method of brazing aluminum 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 type fins are braze... | 11/28/2000 |
| 5935656 | Short duration hot seal for anodized metal surfaces 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 minutes per micrometer... | 08/10/1999 |
| 5935348 | Composition and process for preventing corrosion and reducing friction on metallic surfaces 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 of an alkylamine ... | 08/10/1999 |
| 5928441 | Hot rolling method of steel products and hot rolling roll for steel products 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 and a hot rolling ... | 07/27/1999 |
| 5916379 | Treatment of ferrous metal surfaces 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 surface against co... | 06/29/1999 |
| 5795661 | Zinc coated steel sheet and strip having improved formability and surface quality and method thereof 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 having a coating we... | 08/18/1998 |
| 5723183 | Metal coloring process 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 coating has an order... | 03/03/1998 |
| 5628839 | Components of apparatus for film making and method for manufacturing the same 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 sulfuric acid, ph... | 05/13/1997 |
| 5624712 | Liquid fatty acid protection of anodized aluminum 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 surface is of a co... | 04/29/1997 |
| 5385616 | Corrosion inhibition by formation of iron carboxylate 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 produced by a reac... | 01/31/1995 |
| 5368655 | Process for chromating surfaces of zinc, cadmium and alloys thereof 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 complex at a pH of from ... | 11/29/1994 |
| 5350467 | Method of heat treating a zone of each of a plurality of articles 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 in a generally up... | 09/27/1994 |
| 5344504 | Treatment for galvanized metal 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 solution contains fro... | 09/06/1994 |
| 5338375 | Use of iron salts as corrosion inhibitors in titanium vessels A method for inhibiting the corrosion of metals exposed to aqueous mixtures of sulfuric acid and hydrocyanic acid by the use of iron salts.... | 08/16/1994 |
| 5275671 | Aqueous solutions especially for cleaning high strength steel 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/ASTM F 519-77. Th... | 01/04/1994 |
| 5169458 | Method of improving the corrosion resistance of anodized aluminum at low temperatures 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 temperatures below about ... | 12/08/1992 |
| 5112414 | Titanium free composition and process for activating metal surfaces prior to zinc phosphating 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 metal slats and/or p... | 05/12/1992 |
| 5047095 | Process for simultaneous smoothing, cleaning, and surface protection of metal objects 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 be simultaneously d... | 09/10/1991 |
| 4906327 | Method and composition for refinement of metal surfaces 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 another. The prefer... | 03/06/1990 |
| 4761188 | Filiform corrosion-resistant primer coating composition and method for preventing filiform corrosion 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 the hydrotalcite ... | 08/02/1988 |
| 4717431 | Nickel-free metal phosphating composition and method for use 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.... | 01/05/1988 |
| 4705594 | Composition and method for metal surface refinement 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 is limited to a va... | 11/10/1987 |
| 4690715 | Modification of the properties of metals 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 while phosphines are... | 09/01/1987 |
| 4518440 | Method for passivating stainless steel surfaces and product thereof 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 part in a dilute mi... | 05/21/1985 |
| 4509992 | Processes and compositions for the treatment of aluminum surfaces 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 nitrogen atom with a lo... | 04/09/1985 |
| 4354881 | Method for antirust treatment of steel stocks 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 represented by the gener... | 10/19/1982 |
| 4349390 | Method for the electrolytical metal coating of magnesium articles 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 carried out in a solut... | 09/14/1982 |
| 4318754 | Surface treatment method for tin-free steel 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 a metallic chromiu... | 03/09/1982 |
