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Blackening Coating: flow of metal blackening is as follows: Degreasing: Boil the parts in degreasing solution for 20~30 minutes at 80~100 ℃. Cold water cleaning: rinse with flowing clean water. Pickling: wash with ...

Anodizing: flows through the metal, the oxidation liquid flows as the cathode, the positive elements on the metal surface react with the negative electrode, and a certain thickness of oxide film is formed on ...

Blackening Coating: flow of metal blackening is as follows: Degreasing: Boil the parts in degreasing solution for 20~30 minutes at 80~100 ℃. Cold water cleaning: rinse with flowing clean water. Pickling: wash with ...

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Blackening Coating