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1·Chemistry 4 Mineral acid cleaning and passivation can be performed for iron oxide removal or passivation.

化学作用4：可进行无机酸清洁和钝化以去除或钝化氧化铁。

2·The anticorrosion mechanism of polyamine and metal interface is formed a layer of compact metal oxide film, so that the electrode potential of metal passivation;

其防腐机理是聚胺与金属界面形成一层致密的金属氧化膜，使金属的电极电位钝化；

3·The no pollution bright pickling passivation technique of copper parts introduced in this pa-per, has neither the toxic chromium containing materials nor nitrogen oxide pollution.

本文介绍的铜制件光亮酸洗钝化工艺，既无有毒的含铬物质，又无氮氧化物污染。