盐酸中苯甲酰肼缩肉桂醛对A3钢的缓蚀行为  

Inhibition Behavior of Benzoylhydrazine-Cinnamylidene for Mild Steel in Hydrochloric Acid

作　　者：苏铁军[1] 李克华[2] SU Tie-jun;LI Ke-hua(College of Technology and Engineering,Yangtze University,Jingzhou 434020,China;College of Chemistry and Environmental Engineering,Yangtze University,Jingzhou 434020,China)

机构地区：[1]长江大学工程技术学院,湖北荆州434020 [2]长江大学化学与环境工程学院,湖北荆州434020

出　　处：《材料保护》2020年第1期55-60,共6页Materials Protection

基　　金：长江大学工程技术学院科学研究基金(2018KY05);湖北省教育厅科学技术研究项目(B2016445)资助。

摘　　要：为探究Schiff碱类物质应用于缓蚀领域的更多可能性,以苯甲酰肼和肉桂醛为原料合成了一种新型Schiff碱缓蚀剂(BCA)。采用失重法,电化学阻抗和极化曲线法考察了在10%盐酸介质中BCA对A3钢的缓蚀行为。失重法结果表明,缓蚀率随着BCA浓度的上升而增大,当BCA浓度达到2.00 mmol/L及以上时,缓蚀率可稳定在98%。电化学测试结果表明,BCA的缓蚀行为既与BCA在A3钢表面形成的吸附膜有关,也与BCA阻滞腐蚀产物Fe2+的扩散有关。A new Schiff base( BCA) as acid inhibitor was synthesized by the condensation of benzoylhydrazine and cinnamaldehyde. The corrosion inhibitive performance of the inhibitor for A3 steel in HCl solution was investigated by weight loss test and potentiodynamic polarization and electrochemical impedance spectroscopy. The results of weight loss showed that the corrosion inhibition efficiency increased with concentration of BCA from 0.25 to 2.00 mmol/L. When concentration of BCA was higher than 2.00 mmol/L,the corrosion inhibition efficiency of BCA was98% and tended to be stable. The results of electrochemical testing indicated that the corrosion inhibition behavior of BCA was not only relative to the adsorption film between BCA and mild steel,but also the inhibition behavior of BCA on the diffusion of corrosion products Fe2+.

关 键 词：酸性介质 SCHIFF碱 A3钢 缓蚀行为 

分 类 号：TG174.42[金属学及工艺—金属表面处理]