| An electrochemical method for evaluating the resistance to cathodic disbondment of anti-corrosion coatings on buried pipelines |
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| 引用本文： | Chan Li Bei Cao Yinshun Wu. An electrochemical method for evaluating the resistance to cathodic disbondment of anti-corrosion coatings on buried pipelines[J]. 北京科技大学学报(英文版), 2007, 14(5): 414-419. DOI: 10.1016/S1005-8850(07)60082-6 |
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| 作者姓名： | Chan Li Bei Cao Yinshun Wu |
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| 作者单位： | Chan Li，Bei Cao，and Yinshun Wu Materials Science and Engineering School，University of Science and Technology Beijing，Beijing 100083，China |
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| 摘 要： | Methods for evaluating the resistance to cathodic disbondment (RCD) of anti-corrosion coatings on buried pipelines were reviewed. It is obvious that these traditional cathodic disbondment tests (CDT) have some disadvantages and the evaluated results are only simple figures and always rely on the subjective experience of the operator. A new electrochemical method for evaluating the RCD of coatings, that is, the potentiostatic evaluation method (PEM), was developed and studied. During potentiostatic anodic po- larization testing, the changes of stable polarization current of specimens before and after cathodic disbonding (CD) were measured, and the degree of cathodic disbondment of the coating was quantitatively evaluated, among which the equivalent cathodic disbonded distance ?D was suggested as a parameter for evaluating the RCD. A series of testing parameters of the PEM were determined in these experiments.
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| 关 键 词： | 腐蚀包埋体 钢管 阴极 恒电势 |
| 收稿时间： | 2006-09-06 |
| 修稿时间： | 2006-09-06 |
An electrochemical method for evaluating the resistance to cathodic disbondment of anti-corrosion coatings on buried pipelines |
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| Chan Li,Bei Cao,Yinshun Wu. An electrochemical method for evaluating the resistance to cathodic disbondment of anti-corrosion coatings on buried pipelines[J]. Journal of University of Science and Technology Beijing, 2007, 14(5): 414-419. DOI: 10.1016/S1005-8850(07)60082-6 |
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| Authors: | Chan Li Bei Cao Yinshun Wu |
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| Affiliation: | Materials Science and Engineering School, University of Science and Technology Beijing, Beijing 100083, China |
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| Abstract: | Methods for evaluating the resistance to cathodic disbondment (RCD) of anti-corrosion coatings on buried pipelines were reviewed. It is obvious that these traditional cathodic disbondment tests (CDT) have some disadvantages and the evaluated results are only simple figures and always rely on the subjective experience of the operator. A new electrochemical method for evaluating the RCD of coatings, that is, the potentiostatic evaluation method (PEM), was developed and studied. During potentiostatic anodic polarization testing, the changes of stable polarization current of specimens before and after cathodic disbonding (CD) were measured,and the degree of cathodic disbondment of the coating was quantitatively evaluated, among which the equivalent cathodic disbonded distance △D was suggested as a parameter for evaluating the RCD. A series of testing parameters of the PEM were determined in these experiments. |
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| Keywords: | buried pipeline anti-corrosion coating resistance to cathodic disbondment (RCD) potenfiostatic evaluation method (PEM) fusion bonded epoxy (FBE) three-layer polyethylene (3PE) |
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