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| Number | Title | Issue Date |
| 4421789 | Process for treating the surfaces of aluminum heat exchangers A method for the treatment of aluminum surfaces to provide them with a corrosion resistant, hydrophilic coating. The aluminum surfaces are first provided with a corrosion-resistant film and, thereafter, a coating of fine silica particles is applied to the... | 12/20/1983 |
| 4419199 | Process for phosphatizing metals A process for the phosphatizing of metals, particularly iron, steel and zinc, in which the metal is contacted with acidic aqueous zinc phosphate solutions, containing an oxidizing agent, which contain from 0.4 to 1.5 g/liter of Zn, from 0 to 1.3 g/liter of Ni ... | 12/06/1983 |
| 4416705 | Composition and process for production of phosphate coatings on metal surfaces An aqueous acidic zinc phosphate solution which contains at least 6 g/l of Zn, at least 5 g/l P2 O5, at least 1.0 g/l of an accelerator, calculated as ClO3, from about 1 to about 50 g/l of sulfate ion, which solution has a... | 11/22/1983 |
| 4411965 | Process for high speed nickel and gold electroplate system and article having improved corrosion resistance A method of electrodepositing a gold alloy layer having improved corrosion protection is disclosed. Prior to the gold layer an underlayer of ductile, low-stress nickel is electrodeposited from a solution containing ortho-formyl benzene sulfonic acid and p... | 10/25/1983 |
| 4411961 | Composite electroplated article and process A composite electroplated article and process for making same comprising a body having a plurality of adherent electroplates of controlled thickness and composition thereon. The first layer comprises a nickel-iron alloy containing about 15 to about 50 per... | 10/25/1983 |
| 4411744 | Bath and process for high speed nickel electroplating Electroplating baths for producing semi-bright, ductile, low stressed nickel deposits in an electrodeposition process utilizing insoluble anodes are disclosed. The nickel baths contain, in addition to nickel salts, ortho-formyl benzene sulfonic acid and p... | 10/25/1983 |
| 4410396 | Metal stripping composition and process There is disclosed a chemical stripping solution suitable for removing tin and tin-lead alloys from metallized, e.g. copper coated, substrates so as to leave the said substrate reusable comprising an aqueous solution of hydrogen peroxide in an amount of 0... | 10/18/1983 |
| 4404074 | Electrolytic stripping bath and process An improved electrolytic bath composition and process for stripping relatively thick copper, copper alloy, or chromium deposits from a ferrous basis metal comprising an aqueous solution having a pH of from about 1 to about 14 and consisting essentially of... | 09/13/1983 |
| 4401527 | Process for the electrodeposition of palladium A process for the electrodeposition of palladium in which palladium is electrodeposited from an aqueous plating bath which contains a bath soluble palladium compound, an electrolyte compound and a nitrite compound in an amount sufficient to provide an exc... | 08/30/1983 |
| 4401526 | Zinc alloy plating baths with condensation polymer brighteners A zinc alloy plating bath comprises a conductive aqueous solution containing zinc ions and nickel and/or cobalt ions and a brightening additive which is a derivative of ଲ-aminopropionic acid or a polymer thereof. A semi-bright to bright zinc alloy d... | 08/30/1983 |
| 4400289 | Composition and process for pickling and removing rust from metal A pickling and rust-removing paste composition suitable for cleaning metal surfaces, including surfaces of steel and aluminum. The composition contains fluoride ions and a mixture of calcium compounds and tervalent iron and/or aluminum compounds and has a... | 08/23/1983 |
| 4400248 | Electrolytic stripping process A process and solution for electrolytically stripping metal deposits, particularly nickel and nickel-iron alloy deposits from a copper or copper alloy basis metal such as brass, for example, in which the aqueous stripping solution contains controlled effe... | 08/23/1983 |
| 4397718 | Zinc plating baths with condensating polymer brighteners A zinc plating bath comprises a conductive aqueous solution containing zinc ions and a brightening additive which is a derivative of ଲ-aminopropionic acid or a polymer thereof. A ductile zinc deposit having a uniform high degree of brightness can be... | 08/09/1983 |
| 4392922 | Trivalent chromium electrolyte and process employing vanadium reducing agent An aqueous acidic trivalent chromium electrolyte and process for electrodepositing chromium platings comprising an electrolyte containing trivalent chromium ions, a complexing agent, halide ions, ammonium ions and a reducing agent comprising vanadium ions... | 07/12/1983 |
| 4392921 | Composition and process for electroplating white palladium Electroplating baths suitable for obtaining white deposits of palladium metal. The bath comprises diaminodinitrite, an ammonium salt, and a sufficient amount of ammonium hydroxide to obtain a bath pH of about 9. Buffers such as ammonium biborate may be em... | 07/12/1983 |
| 4389260 | Composition and process for the phosphatizing of metals A composition for the phosphatizing of metals, particularly iron and steel, which comprises an aqueous acidic, chlorate-containing zinc phosphate solution which contains from 0.5 to 1.5 g/liter Zn from 0.4 to 1.3 g/liter Ni from 10 to 26 g/liter P2 ... | 06/21/1983 |
| 4385096 | Aqueous magnesium treatment composition for metals Described is an aqueous base coat composition utilizing magnesium ion preferably in conjunction with at least some compounds from the group hydrofluoric acid, phosphoric acid, tannic acid, and nitric acid and exhibiting a pH of less than 7. The anti-corro... | 05/24/1983 |
| 4384902 | Trivalent chromium passivate composition and process An aqueous acidic solution and process for treating metal surfaces, particularly zinc and zinc alloy surfaces, for depositing a passivate film of improved clarity and hardness and to impart improved corrosion resistance thereto. The solution contains effe... | 05/24/1983 |
| 4384929 | Process for electro-depositing composite nickel layers An improved composition and process for producing a composite nickel-containing electroplate on a substrate including an inner nickel-containing layer of an average sulfur content of less than about 0.03 percent by weight, an intermediate nickel-containin... | 05/24/1983 |
| 4381228 | Process and composition for the electrodeposition of tin and tin alloys An electroplating bath for the high speed deposition of bright metallic tin utilizing tin fluoroborate and sulfuric acid as the electrolyte; wherein, in addition to certain other additives, the bath contains a perfluoroalkyl sulfonate wetting agent to pro... | 04/26/1983 |
| 4380560 | Process for treatment of black plate containers A process for treating food and beverage containers comprised of low-carbon steel sheet (black plate) to improve the adherence and to resist undercutting of organic can lacquers applied to the surfaces thereof when subjected to agressive environments with... | 04/19/1983 |
| 4377487 | Metal coating process and compositions A composition for forming a phosphate and lubricant coating in a single operation comprises phosphate ions, metal ion other than alkali metal, lubricant particles, cationic emulsifier and a scale prevention additive comprising a naphthalene sulphonic acid... | 03/22/1983 |
| 4376000 | Composition for and method of after-treatment of phosphatized metal surfaces A process of post-treating a conversion-coated metal surface by contacting the surface with a dilute solution of a post-treatment compound, or a metal salt thereof, where the post-treatment compound is poly-4-vinylphenol or the reaction product of an alde... | 03/08/1983 |
| 4375392 | Bath and process for the electrodeposition of ruthenium Improved baths for the electrodeposition of ruthenium metal on various substrates. The ruthenium metal baths are formulated with a complex of ruthenium metal and sulphamic acid wherein the molar ratio is one mole of ruthenium metal and from about 4 to 10 ... | 03/01/1983 |
| 4374876 | Process for the immersion deposition of gold An electroless plating process for depositing gold on substrates, such as metal and metallized substrates, which involves immersing the substrates in an electroless plating bath composed of a trivalent gold complex, an organic carboxylic acid, and/or a mi... | 02/22/1983 |
| 4374709 | Process for plating polymeric substrates A process for pretreating a substantially non-conductive substrate such as a plateable plastic or plastic article having an electroless metal deposit on the surface thereof which comprises the steps of conditioning the surface of the substrate to effect a... | 02/22/1983 |
| 4367099 | Trivalent chromium passivate process A process for treating metal surfaces, particularly zinc and zinc alloy surfaces, for depositing a passivate film of improved corrosion resistance and hardness which comprises the steps of providing an aqueous acidic solution containing effective amounts ... | 01/04/1983 |
| 4366036 | Additive and alkaline zinc electroplating bath and process using same Novel alkylated hydroxyl aryl compounds, such as vanillin which has been alkylated with 3-chloro-2-hydroxypropyltrimethylammonium chloride, are useful as additives in alkaline zinc electroplating baths.... | 12/28/1982 |
| 4365915 | Fluid rail conveying apparatus An apparatus for conveying articles on a cushion of fluid including a longitudinally extending rail defined by a plurality of longitudinally extending members each having a supporting surface oriented in opposed relationship with respect to the supporting... | 12/28/1982 |
| 4359346 | Trivalent chromium passivate solution and process for yellow passivate film An aqueous acidic solution and process for treating receptive metal surfaces, particularly zinc and zinc alloy surfaces, to impart a light-yellow iridescent passivate film thereon imparting improved corrosion resistance thereto. The aqueous solution conta... | 11/16/1982 |
| 4359345 | Trivalent chromium passivate solution and process An aqueous acidic solution and process for treating metal surfaces, particularly zinc and zinc alloy surfaces, to impart improved corrosion resistance thereto. The solution contains effective amounts of chromium ions substantially all of which are in the ... | 11/16/1982 |
| 4359348 | Stabilized trivalent chromium passivate composition and process An aqueous acidic solution and process for treating metal surfaces, particularly zinc and zinc alloy surfaces, for depositing a passivate film to impart improved corrosion resistance thereto. The solution contains effective amounts of chromium ions substa... | 11/16/1982 |
| 4359347 | Chromium-free passivate solution and process An aqueous acidic solution and process for treating receptive metal surfaces, particularly zinc and zinc alloy surfaces, to impart a passivate film thereon imparting improved corrosion resistance thereto. The aqueous solution contains effective amounts of... | 11/16/1982 |
| 4349392 | Trivalent chromium passivate solution and process An aqueous acidic solution and process for treating metal surfaces, particularly zinc and zinc alloy surfaces, for depositing a passivate film of improved clarity and hardness and to impart improved corrosion resistance thereto. The solution contains effe... | 09/14/1982 |
| 4348294 | One package replenisher for aluminum cleaner Disclosed is a one package cleaning solution replenisher concentrate having good temperature stability characteristics. The replenisher concentrate is a temperature stable aqueous acidic solution comprising a polyalkylene glycol-abietic acid surfactant, a... | 09/07/1982 |
