碳钢表面等离子喷涂Cr2O3涂层及其耐腐蚀性能

摘要

Cr2O3 coating on carbon steel was prepared by plasma spraying. The micro-structure and corrosion resistance of the spayed coating were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD) and electrochemical tests. The results showed that the thickness of the coating was about 100μm and the phase composition was mainly Cr2O3. The corrosion rate of the Cr2O3 coating decreased dramaticlly after spraying Cr2O3.%利用等离子喷涂技术在45(XRD)等方法表征了涂层的微观形貌、表面元素组成以及相结构;测量了涂层的显微硬度;采用CS300P型电化学工作站检测了Cr2O3涂层的耐蚀性能.结果表明,在45#钢表面等离子喷涂CrzO3涂层的厚度约为100μm,相成分主要是Cr2O3;显微硬度值达到莫氏9级;喷涂Cr3Oa涂层后的试样腐蚀速率显著降低,耐蚀性能明显提高.