醋酸对碳钢CO_2腐蚀的影响  

Effect of Acetic Acid on Carbon Steel CO_2 Corrosion

作　　者：李林辉[1,2] 龚兵 袁勇 崔磊[1,2] 施岱艳[1,2] 姜放[1,2] 廖芸[1,2] 鲜宁[1,2] 

机构地区：[1]中国石油集团工程设计有限责任公司西南分公司,四川成都610041 [2]中国石油天然气集团公司石油管力学和环境行为重点实验室,四川成都610041 [3]中国石油西南油气田公司安全环保与技术监督研究院,四川成都610041

出　　处：《天然气与石油》2014年第3期50-52,11,共3页Natural Gas and Oil

基　　金：国家重大科技专项"大型油气田及煤层气开发"(2011ZX-05059)

摘　　要：综述了油气集输管道内醋酸对醋酸CO2腐蚀的影响研究,阐述了油气田CO2腐蚀、醋酸腐蚀、醋酸对CO2腐蚀的影响、CO2与醋酸共存体系的腐蚀防护等。近年来的研究表明,醋酸在非常低的浓度下会对CO2的腐蚀产生影响。醋酸和醋酸盐都会提高CO2的腐蚀速率。原因在于醋酸与铁结合形成醋酸铁而使碳酸铁从管道表面脱离,使得碳酸铁膜变薄,腐蚀速率提高。用半球腐蚀模型展示了醋酸促进CO2局部腐蚀,尤其是点蚀的发展过程。在归纳总结现有研究进展的基础上,提出了有待进一步研究的技术问题。Acetic acid is one of common substances in produced fluids of oil and natural gas and has important effect on CO2 corrosion. It is one of the main factors resulting in failure of metallic materials. Study shows that under certain conditions, low molecular weight organic acids(formic acid, acetic acid and propionic acid) are main corrosion resources of carbon steel pipeline failure and acetic acid accounts for the highest percentage of these low molecular weight organic acids, up to 50-90%. Reviewed are studies on effect of acetic acid in oil and gas gathering and transportation pipelines on carbon steel corrosion and proposed are some effective corrosion prevention measures.

关 键 词：醋酸 CO2腐蚀 醋酸腐蚀 

分 类 号：TE988.2[石油与天然气工程—石油机械设备]