Abstract: A carpet fitting, such as a cover strip, threshold guard, edging piece, threshold strip or joining strip of which, in use, a surface is exposed to view. Such exposed surface is coated with flock by electrostatic deposition. Further surface areas may be so coated. The flock may be selected to blend with the carpet and the flock coating assists in preventing persons from slipping on the fitting.

Abstract: Aluminum substrates are provided having a coating of particulate material bound thereto by means of an in situ formed binder of aluminum hydroxyoxide. The coated aluminum constructions have utility in imaging and reproduction processes (e.g., as printing plates, as electrographic elements, etc.), as magnetic recording surfaces, controlled roughness surfaces, decorative panels, protective surfaces, etc.

Abstract: A method of forming a low temperature seal on anodized aluminum and removing sealing smudge therefrom comprises treating anodized aluminum with an aqueous sealing solution at a temperature of at least 140.degree. F. and containing 2 to 6 g/l of hydrolyzable metallic salt, 5 to 20 ml/l of an ethanolamine and 50 to 2000 mg/l soluble sulfate (SO.sub.4 .sup.=), and thereafter removing sealing smudge formed by this treatment with mineral acid.

Abstract: This invention relates to the use of sodium nitroferricyanide as a substitute for sodium or potassium ferricyanide in nitric acid acidified, hexavalent chromium-fluoride solutions for the treatment of aluminum and its alloys (wherein aluminum is the principal constituent), providing coatings having excellent corrosion-resistance, reduced surface powdering, and improved adhesion and appearance. Small amounts of sodium vanadate may also be added to effectively modify the characteristics of the deposited coatings. Controlled build-up of the protective coatings, produced by chemical reaction between the active components of the solution and the aluminum or aluminum alloy surfaces, are readily accomplished within a temperature range of 65.degree.-85.degree. F. and an immersion time of 5-10 minutes.

Abstract: A method of forming a low temperature, smudge-free seal on anodized aluminum comprises exposing anodized aluminum to a source of ammonia vapors.

Abstract: This invention is directed to a method of pretreating an aluminum surface for the application of paint, adhesives and the like comprising subjecting the surface to the high temperature action of an alkaline solution containing a nonionic or anionic surface active wetting agent which retards the etching of the aluminum surface by the caustic solution.

Abstract: Efficiency of chemical surface finishing baths for metal articles, particularly electrolytic baths for anodizing metals such as aluminum, magnesium or titanium is improved by incorporating into the bath an effective amount, typically from 0.1 to 50 grams per liter of the reaction product of a metal halide, such as boron trifluoride, and a trifluoro-alkaryl amine, suitably .alpha.,.alpha.,.alpha.,-trifluoro-m-toluidine.

Abstract: A cost saving method for protecting an engine element against operation galling and corrosion is disclosed. The element, particularly a piston, is cast of aluminum and cleaned free of dirt and organic matter. A warm stream of an aqueous solution containing a protective metal agent is directed onto a selected zone of the element. The agent consists essentially of potassium stannate and the zone is preferably the middle region of a piston skirt extending from the upper skirt periphery to lower skirt extremity (tail). The stream is maintained as a laminar flow as it traverses the selected zone. An ultra-thin protective coating is adherently deposited on the zone of the piston.

Abstract: The invention allows one to obtain a strongly adherent dark grey to black coating, with good corrosion resistance, on aluminium and its alloys. The degreased aluminum is pre-treated in an aqueous solution containing at least one salt of a metal which is less electronegative than aluminium. It is then colored in another aqueous solution containing molybdate ions and at least one fluorine compound and/or a heavy metal chloride, and/or an organic chlorine compound with active chlorine atoms.

Abstract: Disclosed is a process for treating aluminum wherein the surface is contacted with a solution containing phosphate, a tannin, titanium and fluoride prior to inking or lacquering. The process produces a coating exhibiting adhesion, color and corrosion resistance comparable to that obtained via conventional chromium-based processes without creating the pollution problems of chromium disposal.

Abstract: This invention relates to the formation of a hydrophobic and usually oleophilic coating on an aluminum surface by treating the aluminum surface with an aqueous alkaline solution containing long chain aliphatic carboxylic acids, alkali metal salts or ammonium salts of such acids or other long chain aliphatic compounds which generate a long chain carboxylate anion in an alkaline solution.

Abstract: A thin film integrated circuit consists of a first conductor of aluminum extended in any desired direction on an insulating substrate, an anodized film formed by anodization in a chromic acid solution at positions other than cross-connectional parts on the first conductor, a second conductor cross-connected on the first conductor, and an anodized film formed by anodization in a chromic acid solution on the surface of the second conductor. The thin film integrated circuit is prepared by partially forming an anodized film in a sulfuric acid or oxalic acid solution at cross-connectional parts of a first conductor of aluminum so as not to form any anodized film in a chromic acid solution at the cross-sectional parts of the first conductor of the circuit, masking the partially formed anodized film with a photoresist film, then forming an anodized film by a chromic acid solution, and then removing the photoresist film and the anodized film.

Abstract: An anodized article and method of absorbing solar energy comprises an alloy layer of aluminum containing up to 18% by weight silicon having a surface matrix layer of aluminum oxide and crystals of silicon dioxide grown from the alloy extending through, bound in and supported by the aluminum oxide matrix. The anodized article may be made by etching the alloy layer to expose virgin alloy and particularly silicon and electrochemically anodizing the etched alloy to grow silicon dioxide crystals and to form an aluminum oxide supporting matrix around the crystals.

Abstract: A conventional Newtonian chemical conversion material is mixed with water, thickener and a surfactant to produce a thixotropic non-Newtonian chemical conversion material with improved application properties.

Abstract: A method of forming a hydrophilic coating on an aluminum surface comprises the steps of:A. etching the aluminum surface;B. treating the etched aluminum surface with an acidic first aqueous solution comprising from about 0.5 to about 3 g/l of active fluoride, from about 2.5 to about 60 g/l of chromate ion (calculated as CrO.sub.3) and from about 2 to about 300 g/l of phosphate ion, so as to form a coating having a weight of at least 150 mg/sq. ft.;C. treating the aluminum surface with an alkaline second solution containing an alkali metal silicate; andD. baking the treated aluminum surface.

Abstract: A method of surface treating aluminum, particularly aluminum metallization for semiconductors, which includes subjecting the aluminum surface to be treated with fuming nitric acid for one to ten minutes at room temperature. Following cleaning, the surface is subjected to boiling water for 5 to 15 minutes. The foregoing treatment appears to form a boehmite (AlO(OH)) layer on the surface of the aluminum, thereby substantially eliminating hillocking.

Abstract: Monitoring the production of a reactive or pyrophoric aluminum (produced by the milling of particulate aluminum in the presence of a subsequently displaceable material capable of sorbing onto the surface of the aluminum sufficiently to stabilize it) to ensure that the mill does not revert to conditions wherein welding rather than comminution predominates.

Abstract: The invention is for an improved process for chemically forming a protective, color receptive coating on the surface of aluminum. The aluminum may be aluminum parts or substrates coated with a layer of aluminum. Absent conventional steps such as water rinses and the like, the process comprises cleaning the aluminum surface to the extent necessary, including desmutting, and contacting the part with a spray comprising an aqueous alkaline solution of a ferricyanide compound, with or without added oxygen, for a time sufficient to form the coating. The treatment is believed to be a chemical oxidizing step similar to the formation of an oxide film electrically using a conventional anodizing process.

Abstract: A corrosion resistant conversion coating consisting essentially of hexavalent chromium, fluosilicate ion, nitrate ion, and a source of soluble barium. Improved paintability and corrosion resistance of the aluminum surface is claimed adapting the aluminum for siding and other architectural uses.

Abstract: A method for preparing aluminum or aluminum alloy bodies to receive an electrically deposited surface coating is disclosed. The method includes degreasing the body, if necessary, etch cleaning and zinc coating the body, washing and drying the etch cleaned and zinc-coated body, etching the dried body in 40.degree. Baume nitric acid or, when the body is an alloy of aluminum containing as much as about 2 percent of silicon, in 40.degree. Baume nitric acid which also contains from 11/2 to 3 percent of ammonium bifluoride, washing the etched body in cold running water, zincating the washed body and washing the zincated body in cold running water. The baths used in the various steps of the method of the invention and the times and temperatures used, are set forth in the following Table wherein percentages are by weight:______________________________________ TEMPERA- TIME STEP BATH TURE OF STEP ______________________________________ Etch cleaning Aqueous sodium hydroxide, 170-190.degree.F. 5-10 and zinc- 1.3 to 2.

Abstract: Aluminum substrates are provided having a coating of particulate material bound thereto by means of an in situ formed binder of aluminum hydroxyoxide. The coated aluminum constructions have utility in imaging and reproduction processes (e.g., as printing plates, as electrographic elements, etc.), as magnetic recording surfaces, controlled roughness surfaces, decorative panels, protective surfaces, etc.

Abstract: A selective black coating on aluminum is provided which is characterized by a high absorptivity in the visible and near infrared regions of the spectrum (0.38 to 1.9 microns) and a low emissivity for radiation of longer-(infrared)-wavelength (greater than 6 microns). The black or near black coating is applied by immersing the aluminum in a bath containing soluble borate and silicate salts.

Abstract: Treatment of metals, and other surfaces, with dilute colloidal slightly acidic dispersion of silica and tannin. The treating composition is removed from the metal surface before forming any deposit of silica visible to the naked eye. The metals become resistant to chemical attack.

Abstract: An acidic aqueous coating solution for forming on an aluminum surface a coating which is corrosion resistant and to which overlying coatings adhere excellently is disclosed. The coating solution contains compounds of zirconium and fluorine. The use of boric acid in the solution is disclosed also. The coating solution is capable of forming on an aluminum surface a uniformly colorless and clear coating so that the coated surface has the appearance of the underlying metal surface, that is, the coating can be formed without changing the appearance of the metal surface. When coating a shiny bright aluminum surface, there can be produced a coated surface having a uniformly shiny bright appearance which is maintained even after the coated surface is subjected to boiling water.

Abstract: Improved aluminum particulate suitable for powder metallurgy applications is produced by wet-milling particulate aluminum in an inert atmosphere in the presence of a predetermined amount of oxygen to thereby comminute the aluminum into finer particles while oxidizing the new surfaces of such particles and then, after the supply of oxygen is exhausted, welding together such particles by further milling to provide a larger aluminum particle having aluminum oxide dispersed therein.

Abstract: Anodized aluminum oxide coatings are sealed in hot water containing [N-methyl - N - (3-dimethylamino - propyl)-n-perfluorooctylsulfonamide] methylammonium iodide, [N-ethyl-n-perfluorooctyl - sulfonamido tridecaethyleneoxy) ethanol and/or a copolymer of 70% by weight methacrylic acid and 30% by weight ethyl acrylate.

Abstract: Low temperature aluminum diffusion is more uniform when effected with a pack energized by aluminum chloride or other material that does not generate nitrogen, and gives food protection against marine corrosion of steels, and particularly when there is a chromate-type coating applied over the aluminizing. Highly effective chromate-type coating mixture consists essentially of aqueous solution of chromic and phosphoric acid also containing magnesium salts of said acids and dispersed polytetrafluoroethylene particles. Such coating mixture is best applied over porous pre-coating of colloidal inert particles. Aluminized superalloy can be heated in air to whiten it, then cleaned to give product having more ductile case. Such coated superalloy can also be stripped of coating by aqueous HNO.sub.3 --HF--CrO.sub.3 bath.

Abstract: A paint film based on a thermo-setting resin which is applied on an aluminum article may be improved in its adhesion properties and resistance to chemical and mechanical attacks as well as in its resistance to weathering, if the surface of the aluminum article is previously anodized to form the oxide surface layer or is treated in boiling water to form the boehmite surface layer and if the oxide surface layer, including the boehmite layer, is pre-treated with a silane compound prior to the application of the coating composition. The application of the paint composition is conducted in this invention by means of a known coating technique such as dipping, spraying, showering, brushing or roller-coating, other than the electro-deposition technique.

Abstract: Corrosion of aluminum metal by sulfuric acid solution is inhibited by addition of soluble fluoride compounds to the acid solutions. Such corrosion inhibition allows use of aluminum as a construction material in process units, particularly sulfuric acid alkylation units, heretofore constructed of heavier and/or more expensive materials.

Abstract: Herein disclosed is a metal spraying method, which comprises the steps of subjecting the surface of aluminum or aluminum alloy to zinc-substitution treatment so as to form a zinc layer in said surface, and spraying a desired metal directly on the substituted zinc layer or on a metal layer, which is formed by preliminarily spraying such a metal as has sufficient adhesion to said desired metal, so as to form thereon a metal sprayed layer.