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由于铸铁较为特殊的生产工艺和其金相组织的不均匀性及其C原子的结构特点,致使铸铁件疏松多孔,直接裸露于潮湿的大气环境中,尤其在梅雨季节,很快就会产生棕褐色的锈蚀,在同样的环境中,钢件则较铸铁件耐锈蚀。为解决铸铁件较难防锈蚀的课题,选择了对铸铁件较有效的油溶性缓蚀剂和适应的成膜物,使:(1)缓蚀剂有较强的极性基,能与铁形成水不溶或难溶化合物,以阻止金属表面的离子化过程;(2)缓蚀剂的非极性基与成膜物分子互渗互补,形成致密性机械强度及对金属表面粘附性均较好的物理屏蔽保护膜层,以封闭铸铁表面的微孔,阻止每一个腐蚀微电池的产生而达到防锈的目的。
Due to the special production technology of cast iron and the heterogeneity of its microstructure and the structural characteristics of its C atoms, cast iron pieces are loose and porous and exposed directly to humid atmospheric environment, especially during the rainy season, and soon brown Brown rust, in the same environment, steel parts are more resistant to corrosion of cast iron. To solve the problem of cast iron parts is more difficult to prevent corrosion, the choice of cast iron parts more effective oil-soluble corrosion inhibitors and film adaptation, so that: (1) corrosion inhibitor has a strong polar group, with iron The formation of water-insoluble or insoluble compounds, to prevent the metal surface ionization process; (2) corrosion inhibitor non-polar base and membrane molecules complement each other to form a compact mechanical strength and adhesion to the metal surface are Good physical shielding protective film to close the surface of the micro-holes cast iron to prevent corrosion of each micro-cell to achieve the purpose of rust.