The corrosion behaviour of AISI 304 stainless steel in methanol-H2SO4 mixtures
The corrosion behaviour of AISI 304 stainless steel in methanol-H2SO4 mixtures
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DOI：
10.1016/0010-938x(88)90058-3
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发表时间：
1988
影响因子：
8.3
通讯作者：
V. Singh;V. Singh
中科院分区：
文献类型：
--
作者：
V. Singh;V. Singh
研究了AISI304不锈钢在含不同浓度H_2SO_4(0.001~(-1)M)的脱气甲醇溶液中的电化学行为。在阴极极化过程中，观察到了明显的扩散控制行为，特别是在甲醇溶液中含有低浓度酸的混合物中。在阳极极化条件下，随着甲醇中硫酸浓度的增加，钝化的临界电流增大。在1和0.1M H_2SO_4-甲醇溶液中的阳极研究中，观察到阴极环。在高浓度的H_2SO_4中，在1.1V以上观察到透过率。阳极极化后，用扫描电子显微镜观察电极表面，发现在甲醇溶液中每种浓度的酸都有大量的凹坑。酸浓度越高，点蚀电位越高。
The electrochemical behaviour of AISI 304 stainless steel has been studied in de-aerated methanolic solutions containing different concentrations of H2SO4(0.001–1 M). During cathodic polarization diffusion controlled behaviour is observed which is prominent, particularly in mixtures containing low concentrations of acid in methanol solutions. With anodic polarization the critical current for passivity increases as the concentration of sulphuric acid is increased in methanol. In anodic studies in 1 and 0.1 M H2SO4-methanol solutions, cathodic loops are observed. Transpassivity is observed at above 1.1 V in high concentrations of H2SO4. After anodic polarization the electrode surface was examined by SEM which showed numerous pits in each concentration of acid in methanol. The pitting potential is found to be nobler with higher acid concentrations.