机械镀锌-锰、锌-铝-锰合金工艺及镀层的耐蚀性能

为了获得性能良好的含锰合金镀层,以机械镀锌和机械镀锌铝工艺为基础,通过调整活化剂和促进剂的种类及用量,开发了机械镀锌锰合金工艺。利用该工艺可在钢基表面获得不同配比的锌锰及锌铝锰合金镀层,对镀层进行了5%NaCl溶液喷雾加速腐蚀试验及全浸加速腐蚀试验,并与机械镀锌层进行了对比。结果表明,各种配比的锌锰合金镀层的耐蚀性能优于机械镀锌层,且其耐蚀性随着锰含量的增加而增加;锌铝锰合金镀层的耐蚀性能比镀锌层提高数十倍。

Study of the Influence of the Electrolysis Parameters on Mn-Zn, Mn-Cu and Mn-Cu-Zn Alloys Coatings from Electrolytes Containing Complexing Ligands

The process of obtaining of high quality Mn-Zn, Mn-Cu and Mn-Cu-Zn alloy coatings from complexing ligands--citrate, EDTA （ethylene diaminetetra acetic acid） and nitrilotriacetic acid solutions was studied. Factors affecting stability of solutions containing ligand or ligands and influence of electrolysis parameters： electrolyte composition, pH, cathodic current density on chemical composition of the obtained coatings, on their current efficiency, morphology and structure were investigated.