新型柠檬酸酸洗缓蚀剂的缓蚀性能研究

Research on the performance of new citric acid corrosion inhibitor

通过腐蚀失重法研究了缓蚀剂对20#碳钢在柠檬酸溶液中腐蚀的缓蚀性能，并通过电化学极化分析对缓蚀剂的缓蚀机理进行了研究。结果表明，该缓蚀剂在2％～8％柠檬酸中具有优良的缓蚀效果。在酸洗温度（95±2）℃，pH值为3.5～4.0，酸洗时间6 h，缓蚀剂添加量0.3％的条件下，缓蚀率达95％以上，且对三价铁离子具有很好的抑制效果。

The corrosion inhibition inhibitor of 20#carbon steel corrosion in citric acid solution by corrosion weight loss method,and characteristics of steel were measured through electrochemical polarization analysis. Result shows that the corrosion inhibitor in 2% ～ 8 % citric acid,under the condition of acid pickling temperature（ 95 ± 2） ℃,p H 3. 5 ～ 4. 0,pickling time 6 h,corrosion inhibitor 0. 3%,the corrosion rate is more than 95 %,to have excellent inhibition effect on ferric ion.