TC4合金表面渗钼层在模拟油田介质中的耐蚀性

Corrosion Resistance of Molybdenizing Coating on TC4 Alloy in Simulated Oilfield Medium

摘要:

采用等离子表面合金化技术对TC4合金进行渗钼表面改性，使用光学显微镜，辉光光谱分析仪和X射线衍射仪分析渗钼层的特征，借助电化学测试技术评价TC4合金和渗钼层在模拟油田介质中的耐蚀性。结果表明：渗钼层均匀、连续，渗层由钼的沉积层和扩散层组成；渗钼层的耐蚀性略低于TC4合金。

Abstract:

Plasma surface alloying process was employed to prepare molybdenizing coating on TC4 alloy. Microstructural characteristics of the molybdenizing coating were analyzed using optical microscope (OM), glow discharge optical emission spectrometer analysis (GDOES) and X-ray diffraction (XRD). Corrosion resistance of molybdenizing coating and TC4 alloy in simulated oilfield medium were estimatted via electrochemical measurements. The results revealed that the uniform and continuous molybdenizing coating was composed of a deposition layer and a diffusion layer. The molybdenizing coating presented slightly lower corrosion resistance as compared with TC4 alloy.