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.