Abstract: A protective coating is formed on a metallic surface by contacting the surface with an aqueous solution of fluorometallate followed by an aqueous solution containing vanadate ions. The process does not require the use of any organic substances, but provides a corrosion resistant surface having good heat conductivity.

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 protective coating is formed on a metallic surface by contacting the surface with an aqueous solution of fluoromet-allate followed by an aqueous solution containing vanadate ions. The process does not require the use of any organic substances, but provides a corrosion resistant surface having good heat conductivity.

Abstract: A deoxidizing liquid composition for aluminum contains in addition to water: fluoroborate anions, preferably from added fluoroboric acid; an acid, preferably nitric acid, that is a substantially stronger acid than either fluoroboric acid or boric acid; an additional oxidizing agent, preferably hydrogen peroxide; and an organic azole compound. Preferably the composition also contains propylene glycol, which is a stabilizer for hydrogen peroxide and also improves deoxidizing results.

Abstract: The present invention comprises a one-step method of etching and desmutting aluminum and its alloys. The method comprises exposing articles made of aluminum and its alloys to a liquid etching/desmutting composition. The liquid composition comprises water and an acid source comprising sulfuric acid and nitric acid, a non-fluorine etchant source comprising phosphoric acid, and a stabilized oxidant. A particularly preferred liquid composition suitable for the etching and simultaneous desmutting of aluminum and aluminum alloys, comprises water and diluted sulphuric acid, nitric acid, phosphoric acid, molybdate and/or condensed molybdate ions, a perfluoroalkyl sulfonate, and aluminum sulfate.

Abstract: A visible colored chromium- and phosphorus-free conversion coating can be formed on a metal surface by contacting it with an aqueous liquid composition that comprises an alizarine dye and a product of chemical interaction between a first initial reagent component selected from the group consisting of fluoroacids of the elements titanium, zirconium, hafnium, boron, aluminum, silicon, germanium, and tin; and a second initial reagent component selected from the group consisting of titanium, zirconium, hafnium, boron, aluminum, silicon, germanium, and tin and all of oxides, hydroxides, and carbonates of all of titanium, zirconium, hafnium, boron, aluminum, silicon, germanium, and tin.

Abstract: Anodized aluminum surfaces are advantageously sealed by an energy- and time-saving two step process, in which the first step is contact at not more than 75° C. with a solution containing lithium and fluoride ions and, optionally, surfactant. The second necessary step is treatment with hot water or steam, which may be completed in considerably less time when only hot water or steam is used for sealing. Conventional smut inhibitors and/or neutral buffers as used in hot water for single step sealing may advantageously be included in the second step of this process. 100-1000 ppm concentrations of nickel and/or cobalt ions in the treatment liquid for the second treatment step, if environmentally tolerable, make it possible to complete this step in as little as 10 minutes at a temperature as low as 88° C.

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: The invention is a cleaning solution for degreasing metal articles which contains water soluble, N-alkyl substituted amides in which the alkyl substituent has from 6 to 22 carbon atoms and at least one of (i) amine oxide surfactants, (ii) non-ionic water soluble nonionic surfactants with molecules containing a polyoxyalkylene block, and (iii) alkali stable anionic, or both anionic and amphoteric, surfactants. Preferred compositions of the invention can replace a vapor degreasing process for cleaning oil, grease, and waxy-type contaminants from metal articles to the level of cleanliness required in the aerospace industry.

Abstract: An aqueous liquid composition for cleaning and degreasing metal surfaces consists essentially of water and the following dissolved stably dispersed, or both dissolved and stably dispersed components: A) alkali metal borate salts; B) boric acid in excess of any generated by reaction of anions of component a) with water; C) nonionic surfactant; and D) anionic and/or amphoteric surfactants.

Abstract: An acidic aqueous liquid composition for deburring/degreasing/cleaning metal, in particular aluminum, parts by mass finishing has as its active ingredients: (A) a nonionic surfactant containing halogen atoms, (B) nitrogen based surfactants such as n-alkyl pyrrolidone, builders such as silicates and boric acid, hydrotropes, corrosion inhibitors, and sequestering agents.

Abstract: A chromium and ferricyanide free aqueous cleaner/deoxidizer for aluminum and titanium and their alloys contains strong acid, fluoride ions, aryl quaternary ammonium ions, and di-anionic functional substituted compounds containing at least two aryl groups per molecule. Excellent cleaning and deoxidizing with substantially no etching is achieved.

Abstract: An aqueous liquid chromate free composition for forming a protective coating on metals, particularly aluminum, is made by reacting cobalt(II) cations, carboxylate anions, at least one other type of coordinate complexing agent for cobalt(III) cations, and an oxidizing agent in an aqueous solution in which the molar ratio of carboxylate anions to cobalt(II) cations is from 0.10 to 6.8 and the aqueous solution contains no more than 1% of each of ammonia, ammonium ions, and nitrite ions.

Abstract: A chromium and ferricyanide free aqueous deoxidizer/desmutter for aluminum and magnesium alloys contains nitric acid, ferric ions, and molybdate and/or condensed molybdate anions and preferably also sulfate and fluoride.

Abstract: A chromium-and-ferricyanide non-aqueous cleaner/deoxidizer for aluminum, the cleaner/deoxidizer having an etch rate on titanium that is low enough for practical use in processes where aluminum objects to be deoxidized are held on titanium racks or hangers during the process, combines boric acid, fluoborate anions, and an acid that is stronger than either of boric and fluoboric acids, usually also with an oxidizing agent such as hydrogen peroxide. Rates of etching of aluminum that are at least as much as 50 times the rates of etching of titanium under the same conditions can be achieved, and the deoxidizing of the aluminum is satisfactory for achieving corrosion resistance after subsequent conversion coating of the deoxidized aluminum surface.

Abstract: The invention is a cleaning solution for degreasing metal articles which contains at least one chlorine-free nonionic surfactant with an HLB in the range of 6.5 to 9.5; a second chlorine-free nonionic surfactant with an HLB in the range of above 9.5 to about 14; a chlorinated nonionic surfactant, and an alkalinizing agent and optionally also one or more of anionic or amphoteric surfactant; hydrotroping agents; solubilizers; organic builders, and corrosion inhibitors. The preferred composition of the invention can replace a vapor degreasing process for cleaning oil, grease, and waxy-type contaminants from metal articles to the level of cleanliness required in the aerospace industry.

Abstract: Seal coating compositions and methods of applying them to metallic surfaces, particularly aluminum or alloys thereof, beating a previously formed protective coating, particularly a conversion coating, such as a chromate or phosphate coating or a chrome-free metal oxide conversion coating, or a coating formed by anodization, provide improved corrosion resistance beyond that provided by the previously formed protective coating. The seal coating compositions preferably contain at least one of benzotriazole, nickel and/or cobalt cations and borates, or aminated polymers of vinyl styrene.

Abstract: A chromium and ferricyanide free aqueous deoxidizer/desmutter for aluminum and magnesium alloys contains nitric acid, ferric ions, persulfate, and molybdate and preferably also sulfate, fluoride, and ethoxylated acetylenic diol surfactant.

Abstract: Improved chromate conversion coating composition for forming non-cracking conversion coatings on aluminum or its alloys. Improvement is obtained by control of the total acid (TA) and free acid (FA) levels to a minimum of 6.0 and 3.5 respectively with a TA:FA ratio in the range of 1.5 to 2.5 by inclusion of aluminum nitrate in the composition.

Abstract: Seal coating compositions and method of applying same, to metallic surfaces, particularly aluminum or alloys thereof, containing a previously formed protective coating on the metal surface, to provide for improved corrosion resistance beyond that provided by the previously formed protective coating. Aqueous solutions of the seal coating components are applied to the metal surface containing the previously formed coating which is subsequently rinsed and dried to provide metal articles having improved resistance to corrosion.