Firstly, the possibility and the sensitive potential region of SCC in X70 steel were studied with polarization curve.

• 应用动电位扫描技术,通过研究X70管线钢在敏感性介质中的阳极极化行为,判断X70钢发生应力腐蚀破裂的可能性,并预测该钢种在特定介质中的SCC敏感电位区间;