An experimental study on stress corrosion behavior of A131/A and A131/AH32 low carbon steels in simulated seawater
An experimental study on stress corrosion behavior of A131/A and A131/AH32 low carbon steels in simulated seawater
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DOI：
10.1016/j.oceaneng.2019.106204
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发表时间：
2019-09
影响因子：
5
通讯作者：
Abdolreza Mostafanejad;M. Iranmanesh;A. Zarebidaki
中科院分区：
文献类型：
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作者：
Abdolreza Mostafanejad;M. Iranmanesh;A. Zarebidaki
通过慢应变速率试验、静载荷试验结合断口观察和电化学测试，研究了ASTM 131/A和A131/AH 32钢在模拟海水中的应力腐蚀行为。结果表明，两种钢在SSW中都表现出应力腐蚀开裂（SCC）敏感性，但A131/AH 32钢的SCC敏感性更高。扫描电子显微镜（SEM）观察断裂表面表现出SCC发生在两种钢。在弹性范围内施加拉应力会导致两种钢在海洋环境中的腐蚀速率增加，但腐蚀电位没有变化。在70%屈服应力的拉伸应力下，A131/AH 32钢的腐蚀速率比A131/A钢的腐蚀速率有更大的增加。结果表明，A131/A钢在海洋环境中的综合腐蚀速率高于A131/AH 32钢，其原因是两种钢的合金元素特别是碳含量存在差异。
Stress corrosion behavior of ASTM A131/A and A131/AH32 steels were investigated in simulated seawater (SSW) through slow strain rate test (SSRT), static load test in combination with fracture observation, and also electrochemical assessments. According to the results, both steel showed susceptibility to stress corrosion cracking (SCC) in SSW but the SCC susceptibility was higher in steel grade A131/AH32. Scanning electron microscopy (SEM) observation of fractured surfaces exhibited SCC occurrence on both steel. The application of tensile stresses in the elastic range caused an increase in corrosion rate of the two steel in marine environments, however, the corrosion potential presented no changes. In the tensile stress of 70% of yield stress, the A131/AH32 steel demonstrated a higher increase in the corrosion rate than that of the grade A131/A steel. It was found that the general corrosion rate of steel grade A131/A was higher than that of grade A131/AH32 steel in the marine environment, and the reason was attributed to the differences on the steels' alloying elements in particular on carbon content.