Study on Anticorrosive Cerium Conversion Coating of C_f/6061A1 Composite Surface

作     者：王春雨 张强 周骥 武高辉 

作者机构：School of Materials Science and EngineeringHarbin Institute of Technology 

出 版 物：《Journal of Rare Earths》 (稀土学报（英文版）)

年 卷 期：2006年第24卷第Z2期

页      面：64-67页

核心收录：

学科分类：080503[工学-材料加工工程] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

主　　题：Cf/Al composites REM conversation coating Ce corrosion resistance rare earths 

摘      要：The optimum chemical passivation process of the rare earth metal (REM) conversion coating on the Cf/6061Al composite surface was introduced in this paper and its polarization curves properties were investigated. Ridge-like coatings were found by scanning electro microscope (SEM) observations, and the Al matrix and carbon fibre reinforcement were both coated with Ce conversion coatings, with some minor cracks. The energy dispersive spectroscopy (EDS) plane scan analysis indicates that the major elements in the coating are Ce, O, Si, Al and the Ce content reaches 47.48% (mass fraction). The Ce conversion coatings increase the corrosion resisting properties of Cf/6061A1 composite, with a higher free corrosion potential (Ecorr) and a lower free corrosion current density (icorr) for the coated composite than those of the bare composite. And the Boehmite-treatment would enhance the corrosion resistance of the REM conversion coating. The ca-thodic polarization and anodic polarization were retarded by REM conversion coating, resulting in an improved corrosion resistance.