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在金属防腐蚀中,钼酸钠作为中性、碱性介质中的缓蚀剂和酸性溶液中的金属表面处理添加剂,国外已有许多研究。本文采用电化学方法,研究了在醛化液中钼酸钠对 SUS36不锈钢电极过程的影响,及其缓蚀作用。研究了介质因素(Cl-、Fe(?)、Fe(?)浓度,充气、搅拌、温度)对缓蚀作用的影响。缓蚀试验结果表明,在Cl-浓度小于200PPm 醛化液中,添加0.3%NaMoO_4,缓蚀率达99%,可以有效地防止局部腐蚀。
In the metal anti-corrosion, sodium molybdate as a neutral, alkaline medium inhibitor and acid solution in the metal surface treatment additives, there have been many studies abroad. In this paper, electrochemical methods were used to study the effect of sodium molybdate on the electrode process of SUS36 stainless steel in the hydrofluoric acid solution and its corrosion inhibition. The effects of media factors (Cl-, Fe (?), Fe (?) Concentration, aeration, stirring, temperature) on the corrosion inhibition were investigated. The results of corrosion inhibition test showed that adding 0.3% NaMoO 4 in the concentration of less than 200PPm Cl-concentration, corrosion inhibition rate of 99%, can effectively prevent local corrosion.