Surface modification of ZnMgAl-coated steel by dielectric-barrier discharge plasma.

Surface modification of ZnMgAl-coated steel by dielectric-barrier discharge plasma.
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DOI:
10.1039/c9ra07378g
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发表时间:
2019-10-28
期刊:
影响因子:
3.9
通讯作者:
Grundmeier, Guido
Grundmeier, Guido
中科院分区:
化学3区
文献类型:
--
作者:
Knust, Steffen;Kuhlmann, Andreas;de los Arcos, Teresa;Grundmeier, Guido

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在本研究中,将 ZnMgAl 合金涂层钢板暴露于具有不同气体混合物(Ar、Ar + 5% O2、Ar + 5% H2O)的介质阻挡放电等离子体中。在表面发现了五种不同的等离子体诱导过程:(i) 脂肪族碳基团的蚀刻,(ii) 吸收的羧酸盐转化为碳酸盐,(iii) 电场诱导的 Zn 和 Mg 向表面迁移,(iv) 增加的氧化层厚度,以及 (v) 最初非常不均匀的合金的表面电势的均匀化。每个过程的相对贡献取决于特定的气体混合物。剥离测试研究表明,所有大气压等离子体处理都提高了两种不同粘合剂(丙烯酸酯和环氧胺)合金涂层的粘合性能。最高的改进与 Ar + 5% H2O 气体混合物的情况相关,其中所有描述的表面处理都在很大程度上发生。大气 DBD 等离子体引起的 ZnMgAl 合金涂层表面化学变化与由此产生的粘合性能之间的相关性。
In this study, ZnMgAl alloy coated steel sheets were exposed to a dielectric-barrier discharge plasma with different gas mixtures (Ar, Ar + 5% O2, Ar + 5% H2O). Five different plasma-induced processes were identified at the surface: (i) etching of aliphatic carbon groups, (ii) conversion of absorbed carboxylates to carbonates, (iii) field-induced migration of Zn and Mg towards the surface, (iv) increased oxide layer thickness, and (v) homogenization of the surface potential of the originally very heterogeneous alloy. The relative contribution of each process depended on the specific gas mixture. Peel-test studies showed that all atmospheric-pressure plasma treatments improved the adhesive properties of the alloy coating for two different adhesives (acrylate and epoxy amine). The highest improvement was associated to the case of Ar + 5% H2O gas mixture, where all described surface processes took place to a high degree. Correlation between atmospheric DBD plasma-induced surface chemical changes on a ZnMgAl alloy coating and the resulting adhesive properties.
DOI: 10.1021/la8000619
发表时间: 2008-08-19
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