(1) ferric chloride corrosion of copper corrosion solution along with the increase in the number of and changing the corrosion solution from golden yellow-green, yellow-brown ?ú ?ú ?ú healants black-green, are also reduced, so keep. The old corrosive liquid ferric chloride is extremely easy to generate a surface layer of oxide film, such as on the aspects of the suites, you prevent corrosion, resulting in blotchs, korshinskii, that, at any time covered the head of the oxide film cleared.

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