材料工程Issue(7)：64-70,7.
SO42-浓度对304不锈钢在NaCl溶液中点蚀行为影响的研究
Effect of SO42- Concentration on 304 Stainless Steel Pitting Corrosion in NaCl Solution
摘要
Abstract
Effect of SO42- concentration on 304 stainless steel pitting corrosion in 3. 5%NaCl solution was investigated by means of dynamic potential polarization, electrochemical impedance spectroscopy (EIS) and electronic speckle pattern interferometer (ESPI). The pitting induction time τ under 0. 3V (vs SCE) polarization was detected by means of ESPI and chronoamperometry. The results showed that the stainless steel corrosion resistance was the worst when the SOS42- concentration was 0. 5%. When the SO42- concentration was below 1%, the corrosion resistance was worse than that having no SO42- . When the SO42- concentration was beyond 1% , the corrosion resistance was better. The pitting induction time t of the 304 stainless steel were 4s, 9s and 94s in 0. 5%NaCl+0. 5%Na2SO4 solution, 3. 5%NaCl solution and 3. 5%NaCl+4%Na2SO4 solution respectively.关键词
304不锈钢/点蚀/激光电子散斑干涉技术/硫酸根离子Key words
304 stainless steel/pitting/ ESPI/SO42-分类
矿业与冶金引用本文复制引用
杜楠,田文明,赵晴,孟保利..SO42-浓度对304不锈钢在NaCl溶液中点蚀行为影响的研究[J].材料工程,2012,(7):64-70,7.基金项目
国家自然科学基金项目(51071083) （51071083）
