H_2S-CO_2高低分压下高硫高盐介质中BNS管线钢的腐蚀速率  

Corrosion Rate of BNS Pipeline Steel in Medium of High Sulfur and High Salinity under Different H_2S- CO_2 Partial Pressure

作　　者：蔡国伟[1,2] 李言涛[1] 于勇 谷丰 田青[4] 

机构地区：[1]中国科学院海洋研究所海洋环境腐蚀与生物污损重点实验室,山东青岛266071 [2]中国科学院大学,北京100049 [3]中国石油集团工程设计有限责任公司北京分公司,北京100085 [4]北京石油化工学院,北京102617

出　　处：《材料保护》2015年第8期5-7,16,共4页Materials Protection

基　　金：中国石油天然气股份有限公司重大科技专项项目(2011E-2503)

摘　　要：为了掌握H2S-CO2高低分压下高硫高盐强腐蚀介质中钢的腐蚀速率,采用全浸挂片法、XRD测试技术对伊朗北阿油田BNS管线钢在温度、压力、Cl-浓度变化下的腐蚀规律进行了研究。结果表明:在H2S-CO2低分压下,BNS管线钢的腐蚀产物为Ca CO3,随着温度的升高,腐蚀速率先减小后增大,随着压力的增加,腐蚀速率减小,随着Cl-浓度的升高,腐蚀速率升高;在高分压下,腐蚀产物主要为Cl-和Fe CO3混合物,随温度的升高,腐蚀速率减小,Cl-浓度对腐蚀速率的影响较为复杂。Corrosion rules of BNS pipeline steel used in Iran' s North Azadegan oil field were researched under different temperature,pressure and Cl^- concentration by full immersion hanging method and X-ray diffraction technique.Results showed that the corrosion product of BNS pipeline steel was CaCO_3 under the low H_2SCO_2 partial pressure.As temperature increased,the corrosion rate firstly decreased and then increased.In the meantime,the corrosion rate was reduced with the increase of pressure and decrease of Cl^- concentration.Under the high H_2S- CO_2 partial pressure,the main corrosion products were mixtures of Cl^- and FeCO_3 and the corrosion rate decreased with the increased temperature,but the effect of Cl^- concentration on the corrosion rate was more complicated.

关 键 词：腐蚀速率 BNS管线钢 H2S-CO2高低分压 高硫高盐介质 

分 类 号：TE988.2[石油与天然气工程—石油机械设备]