柠檬酸、硝酸铵溶液中冷轧钢的腐蚀行为  

Corrosion behavior of cold rolled steel in citric acid and NH_4NO_3 solution

作　　者：白玮[1] 李蕾[2] 李向红[3] 杨世洪[1] 木冠南[3] 

机构地区：[1]云南民族大学化学与生物技术学院,云南昆明650031 [2]云南大学生物资源保护与利用国家重点实验室培育基地,云南昆明650091 [3]云南大学化学系,云南昆明650091

出　　处：《云南大学学报（自然科学版）》2006年第4期345-349,共5页Journal of Yunnan University(Natural Sciences Edition)

基　　金：国家自然科学基金资助项目(50261004);云南省教育厅青年基金资助项目(03Y150D)

摘　　要：利用失重法、动电位极化曲线法研究了室温（20～25℃）下0．01～0．10mol／L柠檬酸、硝酸铵溶液中冷轧钢的腐蚀行为．结果表明，柠檬酸溶液中，冷轧钢的腐蚀速度随柠檬酸浓度的增加而增大，阴、阳两极反应速度也随浓度的增大而加快，但当柠檬酸浓度为0．10mol／L时，阳极反应受到抑制．硝酸铵溶液中。浓度为0．01～0．06mol／L时，钢的腐蚀速度、阴阳两极反应均随浓度的增加而增大；硝酸铵浓度0．06～0．10mol／L时，浓度增加对腐蚀速度和阴极反应影响微弱，而对阳极反应产生抑制作用．详细探讨了腐蚀机理．The corrosion behavior of cold rolled steel in 0.01-0.10 mol/L citric acid and NH4NO3 solution was studied by weight loss and polarization curve methods. The results show that the corrosion rate of cold rolled steel increases with the increase of citric acid concentration. In citric acid solution, both anodic and ca- thodic reactions were accelerated with the increase of acid concentration. However, the anodic reaction was inhibited when the citric acid concentration was 0.10 mol/L. In 0.01-0.06 mol/L NH4NO3 solution, the corrosion rate, anodic reaction and cathodic reaction increased with the increase of acid concentration. In 0.06 0.10 mol/L NH4NO3 solution, both the corrosion rate and cathodic reaction did not change with the increase of acid concentration obviously, while the anodic reaction was inhibited with the increase of acid concenration. The corrosion mechanism was studied.

关 键 词：柠檬酸 硝酸铵 腐蚀 

分 类 号：TG174.42[金属学及工艺—金属表面处理]