钼酸盐缓蚀剂在自来水中的电化学行为

Electrochendcal Steady of Molybdatf Inhibitor in Tap Water

曾一度较普及的铬系、磷系缓蚀剂 ,由于对环境产生影响 ,其应用受到了限制 ,而作为非磷系且无毒的钼酸盐缓蚀剂逐步得到应用。为此 ,通过电化学极化曲线与交流阻抗实验 ,研究了钼酸盐系列缓蚀剂在自来水中对 2 0A碳钢的缓蚀情况。指出钼酸盐与正磷酸盐的复配具有明显的协同效应而与锌盐之间不存在协同关系。

As aresult of environment protection, the non toxic molybdate inhibitor has been gradually used instead of chromate and phosphate inhibitor which has the influence on environment. The corrosion inhibition effect of molybdate inhibitor in tap water on 20A carbon steel has been studied with electrochemical polarization curve and impedance test. It was shown that the inhibition effect of molvbdate increased with the addition of phosphate, but could not increase with the addition of zinc sulfate.