摘要
利用失重法和动电位极化曲线法及电化学阻抗谱法研究了阴离子表面活性剂十二烷基磺酸钠(SDS)对冷轧钢在0.1 mol/L HAc溶液中的缓蚀作用.结果表明:SDS在0.1 mol/L醋酸溶液中能对冷轧钢起到较好的缓蚀作用,缓蚀率随着缓蚀剂浓度的增加而增大,但随温度的增加而下降,最大缓蚀率可达94%.塔菲尔极化曲线表明SDS为抑制阴极为主型缓蚀剂.缓蚀剂在钢表面的吸附是自发、放热过程且符合Langmuir吸附方程.SDS在钢表面发生物理吸附的同时伴随化学吸附的发生,吸附为熵增过程.
Sodium dodecyl sulfonate (SDS)as corrosion inhibitor for cold roiled steel in 0. 1 mol/L acetic acid solu- tion was investigated by the method of weight loss, potentiodynamic polarization and electrochemical impedance spectroscopy(EIS). The results show that SDS is a very good inhibitor for CRS in 0. 1 mol/L HAc. The inhibition efficiency increases with increasing concentration of inhibitorand the best inhibition efficiency is 94%. However, in- hibition efficiency decreases with increase of the temperature. Polarization data show that SDS behaves as a cathode for major inhibitor in HAc solution. The adsorption of inhibitors on the CRS surface is a spontaneous and exothermic process and basically obeys the Langmuir adsorption isotherm equation. cal absorption going with chemical absorption. It is a process of entropy increase by Physi-
出处
《云南民族大学学报(自然科学版)》
CAS
2015年第5期354-357,372,共5页
Journal of Yunnan Minzu University:Natural Sciences Edition
基金
国家自然科学基金(51161025)
云南省自然科学基金(2011FZ173)
云南省绿色化学与功能材料研究省创新团队(2011HC008)
云南省教学改革项目(02001001001067)
云南省高校绿色新能源与材料科技创新团队(2011UY09)
云南民族大学研究生创新基金科研项目(2014YJY70
2014YJY86)
关键词
钢
醋酸
SDS
缓蚀作用
吸附
steel
acetic acid
SDS
corrosion inhibition
adsorption