前言尽管锌的标准电势值相当低,但由于在金属表面可形成稳定的保护膜,所以它在接近中性水溶液或在一般大气条件下有很好的耐蚀性。然而,在较苛刻的腐蚀条件下,可导致保护膜的破坏,最常见的腐蚀产物是在潮湿贮存条件下出现白色锈斑。通常用含有铬酸盐类或亚硝酸盐类的无机配方就可以得到预防,而且有许多报道和专利可供选用。磷酸盐复合物也是经 Introduction Although the standard potential of zinc is quite low, since it forms a stable protective film on the metal surface, it has good corrosion resistance near neutral aqueous solutions or under normal atmospheric conditions. However, under harsher corrosion conditions, it can lead to the destruction of the protective film. The most common corrosion products are white rust under wet storage conditions. Prevention is often achieved with inorganic formulations containing chromates or nitrites, and many reports and patents are available. Phosphate complex is also by