HCO_3~-浓度对油气田中CO_2腐蚀的影响

CORC > 厦门大学 > 2005年第11卷

	HCO_3~-浓度对油气田中CO_2腐蚀的影响; Effect of HCO_3~-Concentration on CO_2 Corrosion in Gas and Oil Fields
	张国安 ; 路民旭 ; 吴荫顺 ; ZHANGGuo-an
刊名	http://electrochem.xmu.edu.cn/CN/abstract/abstract8878.shtml
	2005-11-28
关键词	油气田 CO2腐蚀 HCO3-浓度极化曲线 Oil and gas fields CO_(2) corrosion HCO_3~-concentration Polarization curves
英文摘要	应用动电位扫描和失重法研究HCO3-对油气田CO2腐蚀的影响.实验表明,当HCO3-浓度低于0.042 mol/L时,随着HCO3-浓度的增加,溶液pH升高,H+的还原速率(阴极电流密度)下降;HCO3-浓度增至0.126 mol/L时,溶液中的H2CO3、HCO3-的直接还原占主导地位,故阴极过程随HCO3-浓度的上升而加速,对阳极过程,在HCO3-浓度低于0.042 mol/L下,主要为活化过程,而且其阳极溶解电流(密度)随HCO3-浓度的增加而下降;HCO3-浓度增至0.126 mol/L时,阳极过程出现明显的活化-钝化行为.高温高压腐蚀试验显示,材料的腐蚀速率随介质HCO3-浓度的增加而下降.SEM、EDS、XRD分析表明,在较低的HCO3-浓度下,腐蚀产物膜的主要成分为FeCO3晶体,HCO3-浓度较高时,则腐蚀产物主要为Ca、Mg的化合物,并形成Ca(Fe,Mg)(CO3)2复盐.在高pH值下,Ca2+、Mg2+比Fe2+更容易沉积.; The effecs of HCO_3~-concentration on CO_(2) corrosion in gas and oil fields were investigated by carrying out potentiodynamic scans and weight loss tests.Potentiodynamic polarization curves showed that the cathodic current density decreased with cm increase of HCO_3~-concentration when [HCO_3~-] was lower than 0.042(mol/L.)The cathodic reations were promoted by increasing [HCO_3~-] when it reached 0.126 mol/L,(Anodic) behavior was an active process at low er [HCO_3~-] concentration and the anodic current density decreased with the increase of [HCO_3~-] concentration.An evident active-passive behavior exhibited in anodic process at 0.126 mol/L HCO_3~-.Under high pressure and high temperature,the corrosion rate of steel X65 decreased with the increase of HCO_3~-concentration while pH increased.SEM,EDS,XRD results of the corrosion scales indicated that a typical FeCO_(3) crystallite was found at low HCO_3~-concentration but Ca(Fe,Mg)(CO_(3))_(2) at high HCO_3~-concentration.Ca~(2+),Mg~(2+) precipitated prior to Fe~(2+) at high pH value.; 作者联系地址：北京科技大学腐蚀与防护中心,北京科技大学腐蚀与防护中心,北京科技大学腐蚀与防护中心北京100083,北京100083,北京100083; Author's Address: *,LU Min-xu,WU Yin-shunCorrosion and Protection Center,University of Science and Technology Beijing,Beijing 100083,China
语种	中文
出版者	厦门大学《电化学》编辑部
内容类型	期刊论文
源URL	[http://dspace.xmu.edu.cn/handle/2288/57867]
专题	2005年第11卷
推荐引用方式 GB/T 7714	张国安,路民旭,吴荫顺,等. HCO_3~-浓度对油气田中CO_2腐蚀的影响, Effect of HCO_3~-Concentration on CO_2 Corrosion in Gas and Oil Fields[J]. http://electrochem.xmu.edu.cn/CN/abstract/abstract8878.shtml,2005.
APA	张国安,路民旭,吴荫顺,&ZHANGGuo-an.(2005).HCO_3~-浓度对油气田中CO_2腐蚀的影响.http://electrochem.xmu.edu.cn/CN/abstract/abstract8878.shtml.
MLA	张国安,et al."HCO_3~-浓度对油气田中CO_2腐蚀的影响".http://electrochem.xmu.edu.cn/CN/abstract/abstract8878.shtml (2005).