Adhesion and corrosive delamination of epoxy films on chemically etched ZnMgAl‐alloy coatings

Adhesion and corrosive delamination of epoxy films on chemically etched ZnMgAl‐alloy coatings
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化学蚀刻ZnMgAl合金涂层上环氧薄膜的附着力和腐蚀分层

DOI:
10.1002/maco.201608968
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发表时间:
2016
期刊:
Materials and Corrosion
影响因子:
--
通讯作者:
G. Grundmeier
G. Grundmeier
中科院分区:
--
文献类型:
--
作者:
K. Pohl;O. Ozcan;M. Voigt;G. Grundmeier

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通过光谱法、扫描开尔文探针(SKP)和剥离试验测量,研究了碱性和酸性预处理步骤对ZnMgAl合金涂层钢表面化学成分和附着性能的影响。光谱结果表明,表面膜的组成可以通过湿化学处理来调节。为了研究相应的表面粘合性能,用环氧胺粘合剂涂覆样品。潮湿条件下的剥离测试表明,酸性预处理表面和粘合剂之间的相互作用增强。SKP分析的结果表明,酸清洗基板具有最高的抗分层,这可以解释的界面电极电位的偏移。
The effect of alkaline and acidic pretreatment steps on the surface chemical composition and adhesion properties of ZnMgAl‐alloy coated steel was investigated by means of spectroscopic methods, scanning Kelvin probe (SKP) and peel test measurements. The spectroscopic results indicate that the surface film composition can be adjusted by the wet‐chemical treatment. To study the corresponding surface adhesive properties, the samples were coated with an epoxy amine adhesive. Peel tests under humid conditions indicated an increased interaction between the acidic pre‐treated surface and the adhesive. The results of the SKP analysis show that the acidic cleaned substrates have the highest resistance to delamination, which can be explained by the shift of the interfacial electrode potential.
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