喹啉季铵盐酸化缓蚀剂对超级13Cr不锈钢电化学行为的影响  

Inhibition Effect of Quinoline Quaternary Ammonium Salt on Electrochemical Behavior of Super 13Cr Stainless Steel in Acid Medium

作　　者：雷晓维[1,2] 张娟涛 白真权 冯耀荣 张建勋[1] 

机构地区：[1]西安交通大学金属材料强度国家重点实验室,西安710049 [2]中国石油集团石油管工程技术研究院,西安710077

出　　处：《腐蚀科学与防护技术》2015年第4期358-362,共5页Corrosion Science and Protection Technology

摘　　要：研究了喹啉季铵盐对超级13Cr不锈钢在1 mol/L盐酸溶液中电化学行为的影响,并分析了温度、卤族阴离子类型和浓度对于喹啉季铵盐缓蚀效率的影响及机理。研究表明,喹啉季铵盐属于抑制阳极反应为主的混合型缓蚀剂,温度的升高会促进喹啉季铵盐的脱附过程,使其保护作用降低。卤族阴离子协同作用效果的顺序为:I->Br->Cl-。随着I-浓度的升高,其协同作用效果提高。加入0.005 mol/L以上浓度的KI,喹啉季铵盐的缓蚀率可达99%以上。The electrochemical corrosion behavior of super 13 Cr stainless steel in 1 mol/L HCl aqueous solution with quinoline quaternary ammonium salt was studied. The influence of temperature, anions type and concentration of halides on the inhibition efficiency were also investigated.The results showed that the inhibitor was a mixed type inhibitor which mainly suppressed the anodic reaction. The desorption of inhibitor could be facilitated with the increasing of temperature; correspondingly its inhibition efficiency was lowered. The synergistic effect of inhibitors with different halides showed a ranking as follows： I^-〉Br-〉Cl^-. The synergistic effect of inhibitor with I-could be enhanced with the increase of the I-concentration. The inhibition efficiency of quinoline quaternary ammonium salt exceeded 99%, when the concentration of KI was higher than 0.005 mol/L.

关 键 词：缓蚀剂 喹啉季铵盐 超级13Cr 腐蚀 电化学 

分 类 号：TG174.42[金属学及工艺—金属表面处理]