Cr-Si-Al复合涂层的结构与耐蚀耐热性研究

Structure and corrosion and oxidation resistance of composite coating with Cr Si Al

应用Ｐ－Ｃ法（Ｐａｃｋ－Ｃｅｍｅｎｔａｔｉｏｎ）对中碳钢进行Ｃｒ－Ｓｉ－Ａｌ复合涂覆，用光学显微镜观察了涂层的形貌，用电子探针及扫描电镜测定了涂层的表面成分及Ｃｒ，Ｓｉ，Ａｌ在涂层中的分布，用Ｘ射线衍射测定了涂层的结构．将经涂覆后的试样进行盐水腐蚀和高温氧化试验，结果表明。

Medium carbon steel is coated with Cr Si Al by P C method (Pack Cementation).The morphology of coating is observed by using optical microscope.The surface composition of coating and the density distribution of Cr Si Al in coating are measured by EMP.The structure of coating is determined by X ray diffraction.The testing results of corrosion in salt water and oxidation at high temperature show that the corrosion and oxidation resistance of medium carbon steel coated by P C method is improved significarntly.