4-吡啶甲酰肼与十二烷基苯磺酸钠对盐水中黄铜的协同缓蚀效应研究  

Synergistic Effect on Corrosion Inhibition of Brass in Brine by Isonicotinic Acid Hydrazide and Sodium Dodecylbenzenesulphonate(SDBS)

作　　者：黄小红[1] 张胜涛[1] 胡莲跃[1] 

机构地区：[1]重庆大学化学化工学院,重庆400044

出　　处：《全面腐蚀控制》2011年第3期28-35,共8页Total Corrosion Control

摘　　要：本文采用失重法、极化曲线法、交流阻抗法研究环境友好型缓蚀剂4-吡啶甲酰肼与十二烷基苯磺酸钠(SDBS)对黄铜在3.0%NaCl介质中的缓蚀作用。结果表明:当4-吡啶甲酰肼浓度为0.50g/L,十二烷基苯磺酸钠浓度为0.35g/L时,其复配缓蚀效率达到99.65%。本文还对4-吡啶甲酰肼和十二烷基苯磺酸钠对黄铜的缓蚀机理进行了分析,表明4-吡啶甲酰肼在铜合金表面通过化学吸附形成保护膜,SDBS可在保护膜外形成疏水层,阻碍Cl-对铜的侵蚀,两者通过协同缓蚀作用达到对铜的高效保护。The inhibition effects of Isonicotinic acid hydrazide and sodium dodecylbenzenesulphonate（SDBS） on corrosion of brass in 3.0%NaCl solution have been studied using weight loss, polarization curves, electrochemical impedance spectroscopy measurements. It has been shown that the addition Of the mixture of Isonicotinic acid hydrazide and SDBS enhanced the inhibition efficiency to 99.65% at 0.5g/L and 0.35g/L concentration, respectively. It is probabily ascribed to the formation of a adsorption film on brass by Isonicotinic acid hydrazide,followed with a alienation-water film by SDBS to prevent the attack of Cl-. The two inhibitor exhibit an exhcellent protection of brass by synergistic effect.

关 键 词：4-吡啶甲酰肼 十二烷基苯磺酸钠 复配 协同缓蚀作用 

分 类 号：O614.31[理学—无机化学]