采用大气等离子喷涂技术在低碳钢表面制备 Al2O3、ZrO2、ZrO2/Al2O3和 Al2O3/ZrO2涂层。利用扫描电镜(SEM)和 X 射线衍射(XRD)技术对涂层的显微组织和相组成进行分析，采用极化、盐雾和浸泡等实验手段对涂层在3.5% NaCl 溶液中的腐蚀行为进行研究。结果表明，双层 Al2O3/ZrO2涂层比另外三种涂层具有更好的抗腐蚀性能，这主要归因于该涂层中非常少的内联孔洞和稳定的相组成。%ZrO2, Al2O3, ZrO2/Al2O3 and Al2O3/ZrO2 coatings were fabricated on low carbon steel using atmospheric plasma spraying technique. The microstructure and phase composition of the as-sprayed coatings were examined by scanning electron microscopy (SEM) and X-ray diffraction (XRD), respectively. The polarization test, salt spray test and immersion test were used to investigate the corrosion behavior of the coatings in 3.5% NaCl solution. The results suggested that the bilayered Al2O3/ZrO2 coating exhibits superior corrosion resistance when compared with the other coatings. This is ascribed to the presence of very few interconnected pores and stable phases in the coating.
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