铜铁试剂对Q235碳钢在3.5%NaCl溶液中的缓蚀作用

Inhibition Effect of Cupferron on Q235 Carbon Steel in 3.5%NaCl Solution

采用静态挂片和极化曲线测试技术研究了铜铁试剂对Q235碳钢在3.5%Na Cl溶液中的缓蚀作用。结果表明,碳钢在3.5%Na Cl溶液中腐蚀严重,主要为活性溶解,并且伴有明显的点腐蚀。铜铁试剂的加入促进了碳钢的阳极钝化,当铜铁试剂的含量为12.8 mmol/L时缓蚀效率达到90%以上,当铜铁试剂浓度增大为19.2和25.6 mmol/L时,缓蚀效率不变。铜铁试剂主要通过在Q235碳钢的表面吸附实现对Q235碳钢的缓蚀。

The corrosion inhibition of Q235 carbon steel in 3.5%Na Cl solution by cupferron was investigated by means of static immersion test and electrochemical experiments. The results indicated that Q235 steel suffered from serious corrosion with a characteristic of active corrosion, and obvious pits were observed after immersion. Cupferron promoted the passivation of Q235 steel in3.5% Na Cl solution, and the inhibition efficiency was approximately 90% when the concentration of cupferron was up to 12.8 mmol/L. The inhibition efficiency almost maintained constant when the concentration of cupferron increased up to 19.2 and 25.6 mmol/L. The inhibition effect of cupferron was mainly resulted from the adsorption on the steel surface.