The results showed that the passive film was generated on the surface of X70 steel in Na2CO3/NaHCO3 solutions.

• X70钢电化学行为与应力腐蚀相关性研究的结果表明：X70钢在Na2CO3/NaHCO3溶液中，表面生成钝化膜，在特定的电位和应力条件下，会发生阳极溶解型应力腐蚀破裂。