Technical data Protecting against corrosion by passificationArticle no: P7402000 ![]() ![]()
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Principle Some base metals become relatively resistant to corrosion by formation of a dense surface film of oxide. The protective oxide films are mostly very thin, however, so that they can only resist very aggressive chemicals for a limited time. The stability of such metals can be increased by an artificial strengthening of the oxide film, a process known as passification. Two different procedures are used in this experiment:
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