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一、引言研究Fe-Cr-Ni三元合金电镀,正确控制镀层的成分,不仅是有关合金电沉积理论和实践的一个重要问题,而且对于在廉价的碳钢基体上直接电镀上一层薄的耐腐蚀不锈钢层,有一定的指导作用。据报道,国外目前已能从不同类型的电解液中得到Fe-Cr-Ni合金镀层。但所有这些研究,大部分是在以氯化物或硫酸盐为主盐的槽液中进行的,也有采用铬酸盐或氟硼酸盐槽液的,它们具有各自的特点。本文的目的是探讨用电镀法在氯化物一硫酸盐型电解液中,获得其组成与304不锈钢相似的铁铬镍合金镀层(铁铬镍含量分别为68～71%、17～20%、10～11%)的可能性,并通过室内“正交”筛选试验,优选出最佳电解液成分与工艺条件。
First, the introduction of Fe-Cr-Ni ternary alloy plating, the correct control of the coating composition, not only on the alloy electrodeposition theory and practice of an important issue, but also for the cheap carbon steel substrate directly plated on a thin layer of Corrosion-resistant stainless steel layer, there is a guide. It is reported that foreign countries have been able to get from different types of electrolyte Fe-Cr-Ni alloy coating. However, most of these studies were carried out in baths containing chloride or sulfate as the main salt, as well as chromate or fluoborate baths, each with its own characteristics. The purpose of this paper is to explore the electroplating method in chloride monosulfate electrolyte to obtain a composition similar to 304 stainless steel Fe-Cr-Ni alloy coating (Fe-Cr-Ni content of 68 to 71%, 17 to 20%, 10 ~ 11%), and through indoor “orthogonal ” screening test, the optimal electrolyte composition and process conditions are optimized.