选择西部管道用大管径X80钢,通过外加阴极保护电位下的慢应变拉伸试验结合阴极极化曲线对比分析了其在新疆农田水饱和土壤及其模拟溶液中氢脆敏感性的变化规律.结果表明,随阴极保护电位的负移,X80钢的断面收缩率和延伸率逐渐降低,氢脆敏感性增加;农田土壤和模拟溶液中阴极保护电位分别达到-1.15 V(CSE,下同)和-1.10 V时,X80钢发生明显脆断;X80钢在模拟溶液中的氢脆敏感性高于在土壤中.因此利用土壤模拟溶液对X80钢进行氢脆敏感性研究更偏保守,是适宜的.
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