H2S/CO2环境下两种镍基合金的腐蚀行为
Corrosion Behavior of Ni-based Alloys in H2S/CO2 Environment
摘 要
应用电化学极化法和溶液浸泡法对两种耐蚀合金(G3和Incoloy 825)在50 ℃氯化铁溶液中的点蚀敏感性进行了研究;采用高温高压釜研究了在含H2S/CO2气体介质中材料的高温腐蚀性能以及试验温度的影响.利用能谱分析仪(EDS)、扫描电镜(SEM)等分析了腐蚀后试样表面的微观形貌及组成.结果表明,Incoloy 825合金极化曲线中阳极曲线部分很平缓,无钝化区出现,极化度较低,G3阳极区有钝化区,点蚀电位相对较高;G3耐点蚀性能优于Incoloy825,其点蚀临界温度高于50℃;随着温度升高,两种材料的腐蚀程度加剧,其中Incoloy 825在高温下出现点蚀现象.
腐蚀
高温高压
点蚀电位
nickel-based alloy
corrosion behavior
high temperature and high pressure
pitting potential
Abstract
The pitting corrosion behavior of two Ni-based corrosion resistant alloys,G3 and Incoloy 825,were investigated in FeCl3 solution by polarization curves and immersion testing.The high temperature corrosion behavior of the alloys in NaCl solution containing H2S/CO2 was studied using high temperature high pressure autoclave.The scanning electron microscopy(SEM) and energy disperse spectroscopy(EDS) were used to analyze the microstructure and composition of the samples.The results showed that the pitting-resistance of G3 was superior to that of Incoloy 825,and the critical pitting temperature of G3 was higher than 50 ℃.The corrosion behaviors of the two alloys were different,i.e.,G3 had anodic passivation area and higher pitting potential.With the increase of experimental temperature the corrosion degree of the two alloys increased and some pits appeared on the surface of Incoloy 825.
中图分类号 TG172.3
所属栏目 试验研究
基金项目 中石油技术开发项目(2008D-2404)
收稿日期 2009/12/5
修改稿日期 2009/12/27
网络出版日期
作者单位点击查看
联系人作者赵雪会(zhaoxh@tgrc.org)
备注赵雪会,工程师.
引用该论文: ZHAO Xue-hui,BAI Zhen-quan,YIN Cheng-xian,LIN Kai,WEI Bin. Corrosion Behavior of Ni-based Alloys in H2S/CO2 Environment[J]. Corrosion & Protection, 2010, 31(10): 752～755
被引情况:
【1】黄雨舟,刘伯洋,董丽华,尹衍升,常雪婷, "镍基球形碳化钨复合涂层在高温高压饱和H2S溶液中腐蚀行为",腐蚀与防护 35, 861-865(2014)
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