采用慢应变速率实验(SSRT)研究了不同温度和电位下X70管线钢在近中性pH溶液中的应力腐蚀破裂(SCC)行为.结果表明,不同温度下,X70管线钢在近中性pH溶液中的开裂方式都是穿晶型的,具有准解理特征,并且随着外加阴极电位的降低,SCC敏感性增加,氢致开裂占主导.随温度的下降,溶液pH值略有降低,SCC敏感性增加.
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