摘要:Having the electrochemical testing method adopted to investigate electrochemical corrosion properties of HNS(high nitrogen steel) in Na2S-contained saturated CO2 solution was implemented to obtain HNS's passivation stability and corrosion rules.The test results show that,in Na2S-contained saturated CO2 corrosive solution,the surface carrier of Cr13 stainless steel's passivation film has maximal density and it has the worst passivation stability and corrosion resistance;and in the same corrosion environment,the HNS outperforms 316L steel in the corrosion resistance;with the increasing of Na2S concentration,the pitting potential of HNS becomes decreased and the passive current density increased;the passive film's resistance of charge transfer becomes decreased and the HNS' passivation stability and corrosion resistance decreased;with the rise of the temperature,the HNS' corrosion potential and pitting potential get decreased and both passivation current and surface carrier's concentration increased and its charge transfer resistance and passive film resistance become decreased along with a decreased passivation stability.%通过电化学测试方法,对高氮钢在含Na2S饱和CO2溶液中的腐蚀电化学行为进行研究,得到高氮钢的钝化稳定性和腐蚀规律.在含Na2S的饱和CO2腐蚀介质中,Cr13的钝化膜表面载流子密度最大,钝化稳定性最差,耐蚀性最差,316L钢较好,高氮钢最优.随着Na2S浓度的增大,高氮钢的点蚀电位下降,钝化区间变窄,维钝电流变大,钝化膜层的电荷传递电阻降低,高氮钢钝化稳定性能变差,耐蚀性变差.随着温度的升高,高氮钢的自腐蚀电位和点蚀电位均下降,维钝电流增大,钝化膜表面的载流子浓度也增大,且其电荷传递电阻和膜层电阻也降低,钝化稳定性下降.