Mixed rare earth metal conversion coatings on 2024 alloy and Al6061/SiC_p metal matrix composites

来源期刊：中国有色金属学报(英文版)2000年第5期

论文作者：于兴文 曹楚南

文章页码：580 - 584

Key words：2024 alloy; Al6061/SiC_p metal matrix composites; mixed rare earth metal; conversion coatings

Abstract: The processes of mixed rare earth metal (REM) conversion coatings on 2024 alloy and Al6061/SiC_pmetal matrix composites (MMC) were introduced. The coatings were examined to be honeycomb-like feature by scanning electron microscope. X-ray diffraction analysis revealed that the coatings are amorphous structure. The results of X-ray photoelectron spectroscopy indicated that the mixed REM conversion coatings consist predominantly of Ce and O, the contents of other rare earth elements (such as La, Pr) are relatively low, the coatings are about 2~4μm thickness with excellent adhesion and wearability. The results of mass loss test showed that the mixed REM conversion coatings produce corrosion resistant surface of 2024 alloy and Al6061/SiC_p.