苯骈三氮唑对碳钢在溴化锂溶液中的缓蚀作用

THE INHIBITION EFFECT OF BENZOTRIAZOLE ON CARBON STEEL IN LITHIUM BROMIDE SOLUTION

用静态挂片法研究了苯骈三氮唑(BTA)对碳钢在溴化锂溶液中缓蚀作用,并通过极化曲线探讨其缓蚀作用的机理,用扫描电镜观察形成的表面膜形态,用红外光谱探讨表面膜的组成。实验表明苯骈三氮唑对碳钢在溴化锂溶液中有一定的缓蚀作用,其中添加0.020mol/L苯骈三氮唑和0.20mol/L氢氧化锂显著抑制溴化锂溶液对碳钢的腐蚀,分析可能是在碳钢表面形成一层Fe BTA吸附膜,对阳极反应和阴极反应起一定阻滞作用。

The inhibition effect of benzotriazole (BTA) on carbon steel in lithium bromide solution was studied using the methods of weight loss, polarization curves, SEM and infrared spectrum (IR). Benzotriazole inhibited the corrosion of carbon steel in the lithium bromide, by adding 0.20mol/L lithium hydroxide and 0.02mol/L benzotriazole. It is assumed that the complex films of FeBTA formed on the carbon steel decrease the corrosion through inhibition of anodic reaction.