Effect of chloride ions on 316L stainless steel in cyclic cooling water |
| |
Authors: | Zuojia LIU Xuequn CHENG Shengjie LU Xiaogang LI |
| |
Affiliation: | 1) Key Laboratory of Corrosion and Protection (Ministry of Education of China), University of Science and Technology Beijing, Beijing 100083, China;2) Equipment and Power Department, Shijiazhuang Refine & Chemical Company Limited, SINOPEC,Shijiazhuang 050032, China |
| |
Abstract: | The effect of Cl- on the 316L stainless steel in simulated cooling water has been studied using polarization curves, electrochemical impedance spectroscopy (EIS), Mott-Schottky plot and scanning electron microscopy (SEM) techniques. Cl- concentrations vary from 200 to 900 mg/L. Results reveal that the corrosion resistance increases with the decrease of Cl- concentration in simulated cooling water. The increase of Cl-concentration leads to the shift of the corrosion potential towards the positive direction. Mott-Schottky curves show that in the passive film, Cr2O3 and FeO at the inner layer exhibit P-type but Fe2O3 and CrO3 (CrO42-) N-type semiconductive properties. The SEM/EDX data demonstrate that elements such as Fe, O, C, Si and Cl as well as the presence of calcium and aluminum are presented on the surface of the metal. |
| |
Keywords: | Polarization curve EIS Mott-Schottky plot SEM/EDX Simulated cyclic cooling water |
本文献已被 维普 等数据库收录! |
| 点击此处可从《金属学报(英文版)》浏览原始摘要信息 |
|
点击此处可从《金属学报(英文版)》下载全文 |
|