Protective coating for metals
OwnerRobert Hayduinventor
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Abstract
Enhanced resistance to the corrosion of metals such as aluminum, zinc, magnesium and the like is achieved by the application of a metallo-gel film. The composition of the coating uniquely includes liquid manganese nitrate and sodium tungstate as accelerators which accelerate and activate the chromate sources to coat the metal surface being treated.
Claims13
In a chromate conversion formulation for coating metal to inhibit corrosion on the surface of said metal, the inclusion of manganese nitrate as a first accelerator and sodium tungstate as a second accelerator.
A chromate conversion formultion for coating aluminum and similar metals to inhibit corrosive action, said formulation comprising:
- ______________________________________ Approximate Substance Percentage by Weight ______________________________________ deionized water Q.S. % nitric acid 0.45% chromic acid 1.60% hydrofluoric acid 0.30% sodium bichromate 0.80% manganese nitrate 0.30% sodium tungstate 0.40% ______________________________________
A process for protecting exposed metal surfaces comprising the steps of:
- preparing a formulation for producing a chromium containing metallo-gel film which includes manganese nitrate and sodium tungstate as accelerators,
- and applying said formulations to said surfaces.
A metal surface exposed to air, protected with a coating of a chromium containing metallo-gel film which includes manganese nitrate and sodium tungstate as accelerators.
Dependencies are inferred from the claim text.