【摘要】 研究了H2S/CO2共存环境下管道内腐蚀过程中的影响因素,如H2S/CO2比率、含水率、温度、流速等。其中最为重要的就是H2S/CO2比率,H2S/CO2比率不同生成的腐蚀产物就不同,相应的对基体的保护程度也就不同。而含水率则是通过影响液体的乳化形式来影响管道腐蚀速率,当液体由油包水型乳状液变为水包油型乳状液时管道的腐蚀速率大大增加。温度一方面通过影响保护膜的生成另一方面是改变反应的活化能,从而进一步影响腐蚀速率。然而两者共存下的腐蚀研究仍停留在实验的基础上,还未形成十分系统、完善的理论体系。最后介绍了油气集输系统中的几种防腐措施,特别是耐腐蚀钢在防腐蚀领域的应用,值得注意的是铬元素的加入大大增强了钢的耐腐蚀能力,但发生点蚀的风险也大大增加。更多还原

【Abstract】 The paper studies the influence factors of pipeline internal corrosion under the coexistence of H2S/CO2,such as H2S/CO2 ratio,moisture content,temperature,flow rate,etc.The most important one is H2S/CO2 ratio,it effects corrosion products and correspondingly the degree of protection of matrix is different.Water cut affects the corrosion rate through affecting the emulsion liquid form and the corrosion rate will increases sharply when the emulsion changed into oil-in-water.Temperature affects the corrosion rate by affects the formation of corrosion product scale.However,the coexistence of both corrosion research was still on the basis of experiment.It hasn’t formed a very perfect,systematic theory system,and the establishment of its basic theory would be the focus of future research for a long period of time.Finally,several anticorrosion measures of acid gases are introduced,especially the application of corrosion resistant steel.The addition of Cr could improve the ability of corrosion resistance of steel.更多还原