高温高压H2S/CO2环境中镍基合金825的腐蚀行为
Corrosion Behavior of Nickel Based Alloy 825 in High Temperature and High Pressure H2S/CO2 Environments
摘 要
针对高含硫油气田开发过程中所面临的材料腐蚀问题,采用高温高压哈氏合金反应釜,对镍基合金825在高含量H2S/CO2环境中的腐蚀行为进行了研究,利用SEM、EDS、电化学等手段分析了腐蚀试样的微观形貌和结构特征,探讨了腐蚀机理.结果表明,在高温高压H2S/CO2环境中825合金腐蚀很轻微,其最大腐蚀速率仅为0.068 mm/a,应力腐蚀试样表面没有出现裂纹,但有点蚀,点蚀在晶界处形核,表明镍基合金的晶面为其薄弱环节,容易遭到破坏.
H2S/CO2
高温高压
腐蚀速率
nickel based alloy 825
H2S/CO2
high temperature and high pressure
corrosion rate
Abstract
To resolve the materials corrosion problems during exploiting high sulfur oil and gas field,the corrosion behavior of nickel based alloy 825 in high temperature and high pressure environments were studied.The scanning electron microscopy (SEM),energy disperse spectroscopy (EDS) and electrochemical methods were applied to characterize the microstructure and corrosion performance of the samples.The corrosion mechanism was also proposed and discussed.The results indicated that slight corrosion was observed on the alloy surface.Its maximum corrosion rate was 0.068 mm/a.Cracks were not found on the SCC sample surface.However,some pits appeared at grain boundaries of the alloy,indicating that the crystal plane was easily attacked.
中图分类号 TG172.8
所属栏目 试验研究
基金项目
收稿日期 2008/9/1
修改稿日期 2008/10/17
网络出版日期
作者单位点击查看
联系人作者戈磊(gelei08@eyou.com)
备注戈磊,讲师,博士.
引用该论文: GE Lei,CHEN Chang-feng,ZHENG Shu-qi,CAI Xiao-wen. Corrosion Behavior of Nickel Based Alloy 825 in High Temperature and High Pressure H2S/CO2 Environments[J]. Corrosion & Protection, 2009, 30(10): 708～710
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)
【2】徐学利,王纯,毕宗岳,杨耀斌,张万鹏,王冬, "Incoloy825合金TIG和PAW焊接接头耐晶间腐蚀性能的对比",机械工程材料 39, 68-71(2015)
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参考文献
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