摘要
随着含硫化氢腐蚀介质油气田相继被发现开发,硫化氢对油气田金属设备的腐蚀问题也日益严重。为了防止和控制硫化氢对油田金属设备的腐蚀,选取油田常用的20#钢、1Cr18Ni9Ti钢、316L钢和TA2钢,采用浸泡试验分析了4种常用钢在硫化氢环境下的均匀腐蚀行为,采用电化学试验分析了4种常用钢在硫化氢环境下的点蚀行为。综合分析两种试验结果发现:4种常用钢在饱和硫化氢溶液中的耐腐蚀能力由20#钢、1Cr18Ni9Ti钢、316L钢和TA2钢依次增强,其中1Cr18Ni9Ti钢在饱和硫化氢溶液中表现出明显的钝化趋势,采取相关的阳极极化措施可达到很好的防腐效果;316L钢和20#钢在饱和硫化氢溶液中的阴极极化率较大,采用阴极保护措施可以达到防腐的目的。
With the increase of exploration and development of oil and gas fields containing hydrogen sulfide, the problem of hydrogen sulfide corrosion to metal equipment is becoming progressively serious. In order to prevent and control the hydrogen sulfide corrosion in oilfield, the uniform corrosion behavior of commonly used AISI 1020,1CrlSNi9Ti,316L,and TA2 steel were investigated under HzS with immersion test. The electrochemical experimental method was used to analyze the spot corrosion behavior. Experimen- tal results indicate that the corrosion resistance of the four selected materials in increasing order is AISI 1020 steel,1Cr1SNi9Ti,316L and TA2 steel. 1Cr18NigTi showed an obvious passivation trend. Good corro- sion resistance performance should be expected after using anodic polarization. In contrast, cathodic protection can achieve the purpose of corrosion protection since the cathodic polarization rate of 316L and AISI 1020 steel in saturated hydrogen sulfide solution is very high.
出处
《石油钻探技术》
CAS
北大核心
2011年第1期32-35,共4页
Petroleum Drilling Techniques
关键词
油气田
金属设备
硫化氢腐蚀
防腐浸泡试验
电化学试验
oil and gas field
metal equipment
hydrogen sulfide corrosion
soaking experiment
electrochemical test
