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首页> 外文期刊>Journal of Materials Engineering and Performance >Microstructure and Corrosion Behavior of ZnO-Mg Coating on AISI 4140 Steel Fabricated by Spray Coating
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Microstructure and Corrosion Behavior of ZnO-Mg Coating on AISI 4140 Steel Fabricated by Spray Coating

机译：喷涂涂层ZnO-Mg涂层的微观结构和腐蚀行为

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摘要

This paper aims to investigate the corrosion behavior of ZnO-Mg coatings on AISI 4140 steel using spray coating technology. Three different coating thicknesses of approximately approximate to 30, 60 and 90 mu m are considered in this study. The structural and morphological properties of the coated samples are characterized using optical microscope, scanning electron microscope (SEM), x-ray diffraction analysis, atomic force microscope and energy-dispersive spectroscopy analysis. The corrosion behavior is evaluated in a chloride environment by Tafel and electrochemical impedance spectroscopy (EIS) techniques as a function of coating thickness. The acquired results exhibit that the introduction of ZnO-Mg coating improves corrosion resistance of AISI 4140. ZnO-Mg coating acts as a stabilizer in the electrolyte and maintains electrochemical stability. After prolonged polarization, the coating exhibits higher impedance in the subsequent EIS results compared to that of the substrate. The corroded surfaces of AISI 4140 are analyzed using SEM for surface morphological changes.
机译：本文旨在使用喷涂技术研究ZnO-Mg涂层对AISI 4140钢的腐蚀行为。在该研究中考虑了三种不同涂层厚度约为30,60和90μm的涂层厚度。使用光学显微镜，扫描电子显微镜（SEM），X射线衍射分析，原子力显微镜和能量分散光谱分析来表征涂覆样品的结构和形态学性质。作为涂层厚度的函数，通过Tafel和电化学阻抗光谱（EIS）技术在氯化物环境中评价腐蚀行为。所获得的结果表明，ZnO-Mg涂层的引入提高了AISI 4140的耐腐蚀性。ZnO-Mg涂层用作电解质中的稳定剂并保持电化学稳定性。在延长偏振之后，与基材相比，涂层在随后的EIS结果中表现出更高的阻抗。使用SEM分析AISI 4140的腐蚀表面，以进行表面形态变化。

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