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METHOD FOR PHOSPHATING METAL SURFACES IN NON-AQUEOUS PHOSPHATING BATHS
METHOD FOR PHOSPHATING METAL SURFACES IN NON-AQUEOUS PHOSPHATING BATHS
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机译:非水磷化液中磷化金属表面的方法
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摘要
A process for phosphating metallic surfaces in nonaqueous phosphating baths comprising low-boiling halogenated hydrocarbons, aqueous phosphoric acid as the phosphating agent, alcohols as the solubilizer, and, optionally, further known components, e.g., stabilizers, inhibitors, or accelerators, comprising dipping the workpieces to be phosphated at least twice for at least 10 seconds into the boiling phosphating bath and, in the interval, leaving them for at least 20 seconds in the gaseous phase.
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