通过电化学渗氢技术研究了施加不同阴极电位条件下含不同H2S浓度的3.5%NaCl溶液中X70管线钢的氢渗透行为.结果表明,稳态渗氢电流P∞随H2S浓度的增大而逐渐增大,但一定时间内,渗透过试样的氢原子摩尔数并不随之单调增加;氢原子的渗透受到阴极电位的控制,阴极电位越负,渗氢电流越大;在一定电位范围内,稳态渗氢电流P∞和一定时间内渗透过试样的氢原子摩尔数N与阴极电位呈线性关系.扩散系数与试验条件无关.
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