Study on Anticorrosive Cerium Conversion Coating of C_f/6061A1 Composite Surface
来源期刊：Journal of Rare Earths2006年第S1期
论文作者：王春雨 张强 周骥 武高辉
文章页码：64 - 67
摘 要：<正>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.
王春雨，张强，周骥，武高辉
摘 要：<正>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.
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