| 阴极极化对人为破损907A涂层钢腐蚀行为的影响 |
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| 引用本文： | 杜磊,闫洪,凌李石保.阴极极化对人为破损907A涂层钢腐蚀行为的影响[J].装备环境工程,2010(3):1-5. |
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| 作者姓名： | 杜磊 闫洪 凌李石保 |
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| 作者单位： | 南昌大学先进成形制造及模具研究所,南昌330031 |
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| 摘 要： | 采用改性厚浆环氧防锈漆作为涂层材料,研究了不同破损率的涂层对907A钢腐蚀特性及阴极保护效果的影响,测定了不同涂层破损率的907A钢在天然海水中的电化学阻抗谱和极化电流。结果表明,随着浸泡时间的延长,在自腐蚀电位下,2种试样基体的腐蚀程度都不断地加剧。在-0.85 V（vs.SCE）极化电位下,破损率为1%的试样,阴极极化对破损处涂层的破坏作用大于对钢基体的保护作用,未达到预期保护效果;对于破损率为5%的试样,由于涂层缺陷处基体上形成较厚的钙镁沉积层从而减缓了金属腐蚀。
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| 关 键 词： | 人为破损涂层 电化学阻抗谱 阴极极化 |
Effect of Cathodic Polarization on Corrosion Behavior of 907A Steel with Coating of Artificial Defect |
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| LIU Jie,LI Xiang-bo,WANG Jia,XU Li-kun.Effect of Cathodic Polarization on Corrosion Behavior of 907A Steel with Coating of Artificial Defect[J].Equipment Environmental Engineering,2010(3):1-5. |
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| Authors: | LIU Jie LI Xiang-bo WANG Jia XU Li-kun |
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| Institution: | 1.Ocean University of China,Qingdao 266100,China;2.State Key Laboratory for Marine Corrosion and Protection, Luoyang Ship Material Research Institute(LSMRI),Qingdao 266071,China;3.State Key Laboratory for Corrosion and Protection,Shenyang 110016,China) |
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| Abstract: | The influence of coating damage rate on corrosion characteristic of 907A steel and cathodic protection effectiveness was studied with modified epoxy antirust paint as coating material.EIS and polarization current of 907A steel in natural seawater solution with different damage rate coating was determined.The results showed that on free corrosion potential,corrosion of two kinds of samples is increasing with immersion time.On cathodic polarization potential,to the samples of 1% damage rate,cathodic polarization accelerates corrosion of 907A steel;to the samples of 5% damage rate,cathodic polarization alleviates corrosion of 907A steel,the reason is that calcium magnesium deposit is created at defect position of coating. |
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| Keywords: | artificial defect coating EIS cathodic polarization |
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