化工学报2016，Vol.67Issue(z2)：255-261,7.DOI:10.11949/j.issn.0438-1157.20160652
NH4 Cl 溶液浓度对 Incoloy 825合金腐蚀行为的影响
Effect of concentration of NH4 Cl solution on corrosion behavior of Incoloy 825 alloy
摘要
Abstract
The corrosion behavior of Incoloy 825 alloy was investigated in the different concentration of NH 4 Cl solution by electrochemical impedance spectroscopy (EIS),polarization curve measurement and immersion corrosion test.The results show that the open circuit potential shifts negatively with the increase of concentration of NH 4 Cl solution,i.e., the corrosion tendency increases.The equivalent circuit of R S (Q 1 R 1 )(Q dlR t )is used to fit the electrochemical impedance spectra.The EIS result reveals that the charge transfer resistance R t decreases with the increasing of NH 4 Cl solution concentration, meanwhile the passive current density and corrosion rate of Incoloy 825 alloy increases.The corrosion morphologies of the alloy are mainly localized corrosion,the intensity and size of pits increase with the increase of solution concentration.The results of EDS show that Cl- involves in the electrochemical reaction process.关键词
腐蚀/电化学/界面/Incoloy 825/NH 4 Cl 浓度Key words
corrosion/electrochemistry/interface/Incoloy 825 alloy/NH 4 Cl concentration分类
矿业与冶金引用本文复制引用
朱敏,袁永锋,叶华徽,陈绍奇,奚俊凯,祝舜丰..NH4 Cl 溶液浓度对 Incoloy 825合金腐蚀行为的影响[J].化工学报,2016,67(z2):255-261,7.基金项目
国家自然科学基金项目(51501164) （51501164）
浙江理工大学科研启动基金项目(15022014-Y)。@@@@supported by the National Natural Science Foundation of China (51501164) and the Science Foundation of Zhejiang Sci-Tech University (15022014-Y) （15022014-Y）
