Corrosion Resistance of Austenitic Stainless Steel in Sulphuric Acid
Corrosion Resistance of Austenitic Stainless Steel in Sulphuric Acid
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发表时间：
2012
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通讯作者：
R. Loto;C. Loto;A. Popoola;M. Ranyaoa
中科院分区：
文献类型：
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作者：
R. Loto;C. Loto;A. Popoola;M. Ranyaoa
采用重量和金相/扫描电镜表面表征方法，研究了304型奥氏体不锈钢在环境温度下暴露于含氯化钠的强四氧硫酸（ⅵ）酸（浓度为2和5 M）下的耐蚀性和敏感性。利用扫描电子显微镜（SEM）对试样在腐蚀介质中浸泡后的表面形貌进行了观察和表征。利用扫描电子显微镜（SEM）和能谱仪（EDS）分析了表面腐蚀沉积物的组成。本文报道了观察到的严重的一般腐蚀和点蚀以及钢在不同浓度的氯化酸介质中的耐蚀性。结果表明，该不锈钢合金对试验环境具有较弱的耐蚀性/明显的腐蚀敏感性。
The resistance and susceptibility of austenitic stainless steel, Type 304, exposed to strong tetraoxosulphate (VI) acids (2 and 5 M concentrations) contaminated with sodium chloride at ambient temperatures was investigated by gravimetric and metallographic/scanning electron microscopy surface characterization methods. Scanning electron microscope (SEM) was used to examine and characterize the test specimen's surface morphology after immersion in the corrosive media. Surface corrosion deposit composition was analyzed with the SEM paired with energy dispersive spectrometer (EDS). This paper reports the observed severe general and pitting corrosion and the resistance of the steel to corrosion at different concentrations of the acid chloride media. The results obtained showed the weak corrosion resistance/appreciable corrosion susceptibility of the stainless steel alloy to the test environments.