摘要
采用腐蚀电化学动电位扫描技术和腐蚀产物膜的SEM、EDS等微观分析手段,研究了G-3合金在高含H2S/CO2腐蚀环境中,CO2、pH值、Cl-等不同因素对镍基合金G-3腐蚀行为的影响。结果表明:Cl-不利于G-3钝化膜的形成,且使腐蚀加剧;CO2的加入促进了G-3的腐蚀,pH值的增加使G-3的自腐蚀电位出现较大负移,并影响了腐蚀产物膜的稳定性。
Effects of corrosion influencing factors （CO2 ,pH,Cl- ） on corrosion behavior of nickel-based alloy G-3 were studied by potentiodynamic scanning, the analysis of corrosion scales by scanning electron microscopy （SEM） and energy dispersive spectrdmetry （EDS） under the corrosion environment with high contents of H2 S and CO2. The results show that Cl is harmful to the passive film of G-3 and accelerates corrosion. The corrosion is aggravated after pumping CO2 in the corrosion environment with Hz S. With increasing pH value, the corrosion potential shifts to negative direction and affects the stability of the corrosion scales.
出处
《材料科学与工程学报》
CAS
CSCD
北大核心
2009年第4期627-630,共4页
Journal of Materials Science and Engineering
基金
油气藏地质及开发工程国家重点实验室(西南石油大学)资助项目(PLN0609)
