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首页> 外文期刊>International Journal of Electrochemical Science >Influence of Electrochemical properties on Surface Micromorphology of Zn-Al-Mg-RE alloy coatings
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Influence of Electrochemical properties on Surface Micromorphology of Zn-Al-Mg-RE alloy coatings

机译：电化学性能对Zn-Al-Mg-RE合金涂层表面微观形貌的影响

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摘要

Zn-Al-Mg-RE series hot-dip alloy coatings developed which provide effective protection of mild steelsurface against corrosion and oxidation were investigated by Scanning Electron Microscopy (SEM),3D Optical Microscopes, X-ray diffraction (XRD). Significant variation in coating surfacemorphology, polarization parameters and impedance characteristics are observed with increasingcontent of Al and Mg element in this paper. It is found that the charge transfer resistance of electrodereaction (Rct) has an inversely proportional relationship with the surface corrosion roughness (Ra) ofcorroded coatings. Furthermore, the better corrosion resistance derived from certain eutectic reactionin Zn-Al-Mg-RE alloy eutectic process has been indicated in terms of this dynamic relationship. Thecomplex effects on independent processes from initial uncorroded surface microstructure changes incharacteristics during and after electrochemical measurement have been represented for differentcompositions of alloy coatings.
机译：通过扫描电子显微镜（SEM），3D光学显微镜，X射线衍射（XRD）研究了可有效保护低碳钢表面免受腐蚀和氧化的Zn-Al-Mg-RE系列热浸合金涂层。随着Al和Mg元素含量的增加，涂层表面形貌，极化参数和阻抗特性发生了显着变化。发现电反应的电荷转移电阻（Rct）与腐蚀涂层的表面腐蚀粗糙度（Ra）成反比关系。此外，根据这种动力学关系，还表明了在Zn-Al-Mg-RE合金共晶过程中某些共晶反应所产生的更好的耐腐蚀性。对于合金涂层的不同组成，已经表现出了电化学测量期间和之后特性从初始未腐蚀表面微观结构变化对独立过程的复杂影响。

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