| 土壤含水率和氯离子含量对最佳保护电位的影响 |
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| 引用本文： | 李自力,王太源,郝宏娜,杜松林,崔淦. 土壤含水率和氯离子含量对最佳保护电位的影响[J]. 腐蚀科学与防护技术, 2012, 0(3): 232-235 |
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| 作者姓名： | 李自力 王太源 郝宏娜 杜松林 崔淦 |
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| 作者单位： | 中国石油大学(华东)储运工程系 |
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| 基金项目： | 国家科技重大专项大型油气田及煤层气开发项目(2008Z-X05017-04-01)资助 |
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| 摘 要： | 利用电化学阻抗谱技术,研究X70钢的最佳阴极保护电位随土壤中Cl-和含水率的变化.结果表明:在Cl-含量<10 mmol/kg时最佳保护电位随着含水率的增加先升高后降低,变化幅度在150 mV左右;Cl-含量≥10 mmol/kg时,最佳保护电位随着含水率增加呈现降低的趋势;Cl-含量为20 mmol/kg时的不同含水率的土壤中最佳保护电位均达到最小值;随着含水率的升高Cl-对最佳保护电位的影响逐渐减小.
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| 关 键 词： | 电化学阻抗谱 最佳保护电位 阴极保护参数 含水率 氯离子 |
Influence of Moisture and Chloride Ion Content in Soil on Optimal Cathodic Protection Potential for X70 Steel |
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| LI Zili,WANG Taiyuan,HAO Hongna,DU Songlin,CUI Gan. Influence of Moisture and Chloride Ion Content in Soil on Optimal Cathodic Protection Potential for X70 Steel[J]. Corrosion Science and Protection Technology, 2012, 0(3): 232-235 |
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| Authors: | LI Zili WANG Taiyuan HAO Hongna DU Songlin CUI Gan |
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| Affiliation: | Oil and Gas Storage and Transportation Engineering Department of China University of Petroleum,Qingdao 266555 |
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| Abstract: | The relationship of moisture and chloride ion content in Qingdao soil with the optimum cathodic protection potential for X70 steel was studied by electrochemical impedance spectroscopy(EIS)in a laboratory test set.The results revealed that the optimum cathodic protection potential increased firstly,then reduced with the increase of moisture content when chloride ion was less than 10 mmol/kg with a potential fluctuation about 150 mV.When the chloride ion is greater than 10 mmol/kg,the optimal protection potential showed a trend of reducing with increasing moisture content.The optimal cathodic protection potential in soil with various moisture contents reached a minimum for chloride ion content of 20 mmol/kg.With the rise of moisture content,the influence of chloride ion decreased gradually. |
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| Keywords: | EIS optimal protection potential cathodic protection parameters moisture content chloride ion |
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