无机富锌/环氧云铁/脂肪族聚氨酯复合涂层失效过程阻抗与吸水性变化的EIS研究

doi:10.61558/2993-074X.3363

电化学（中英文） ›› 2010, Vol. 16 ›› Issue (4): 362-367. doi: 10.61558/2993-074X.3363

无机富锌/环氧云铁/脂肪族聚氨酯复合涂层失效过程阻抗与吸水性变化的EIS研究

何少平;熊金平;唐聿明;左禹;

北京化工大学材料科学与工程学院;

收稿日期:2010-11-28 修回日期:2010-11-28 出版日期:2010-11-28 发布日期:2010-11-28

EIS Study on the Change of Resistance and Water Absorption during the Failure Graduation of Inorganic Zinc-Rich/Epoxy/Aliphatic Polyurethane Composite Coatings

HE Shao-ping,XIONG Jin-ping,TANG Yu-ming,ZUO Yu

(School of Material Science and Engineering,Beijing University of Chemical Technology,Beijing 100029,China

Received:2010-11-28 Revised:2010-11-28 Published:2010-11-28 Online:2010-11-28

摘要/Abstract

摘要： 应用电化学交流阻抗谱研究不同厚度的无机富锌/环氧云铁/脂肪族聚氨酯复合涂层体系在3.5%NaCl和紫外辐射联合作用下的失效过程.结果表明,复合涂层的保护性随着该涂层总厚度增大而增大,但是其增加的幅度逐渐减小.环氧云铁中间漆的屏蔽作用主要体现在服役前期,而在后期则涂层的耐蚀性主要依靠富锌底漆的作用,同样厚度下的富锌底漆对涂层防护性能的提高作用更为明显.复合涂层体系吸水率的变化呈现"三段式"的特点,涂层越薄,吸水饱和期越短,涂层性能下降越快.

关键词: 复合涂层, 失效, EIS, 涂层厚度

Abstract: The failure process of inorganic zinc-rich/micaceous iron oxide epoxy/aliphatic polyurethane composite coatings in 3.5% NaCl solution under ultraviolet radiation(UV) was studied with Electrochemical Impedance Spectroscopy(EIS).The result shows that the protective property of the coating was enhanced with the increase of total coating thickness,but the degree of improvement reduced gradully as the coating thickness increased.The shielding effect of the micaceous iron oxide epoxy was mainly reflected in the initial period of the service process,while in later period the coating performance largely depended on the zinc-rich primer.The change of the water uptake in the composite coating presented a 'three-stage' characteristic.The thinner the coating,the quicker the water absorption to get saturation,and the faster the protective property of the coating decreased.

Key words: composite coating, failure, EIS, coating thickness

中图分类号:

TG174.4

何少平, 熊金平, 唐聿明, 左禹, . 无机富锌/环氧云铁/脂肪族聚氨酯复合涂层失效过程阻抗与吸水性变化的EIS研究[J]. 电化学（中英文）, 2010, 16(4): 362-367.

HE Shao-ping, XIONG Jin-ping, TANG Yu-ming, ZUO Yu . EIS Study on the Change of Resistance and Water Absorption during the Failure Graduation of Inorganic Zinc-Rich/Epoxy/Aliphatic Polyurethane Composite Coatings[J]. Journal of Electrochemistry, 2010, 16(4): 362-367.

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链接本文: https://electrochem.xmu.edu.cn/CN/10.61558/2993-074X.3363

https://electrochem.xmu.edu.cn/CN/Y2010/V16/I4/362

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无机富锌/环氧云铁/脂肪族聚氨酯复合涂层失效过程阻抗与吸水性变化的EIS研究

EIS Study on the Change of Resistance and Water Absorption during the Failure Graduation of Inorganic Zinc-Rich/Epoxy/Aliphatic Polyurethane Composite Coatings

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