摘要
Composite coatings were obtained on A3 steel by hot dipping aluminum(HDA) at 720 ℃ for 6 min and micro-plasma oxidation(MPO) in alkali electrolyte. The surface morphology, element distribution and interface structure of composite coatings were studied by means of XRD, SEM and EDS. The results show that the composite coatings obtained through HDA/MPO on A3 steel consist of four layers. From the surface to the substrate, the layer is loose Al2O3 ceramic, compact Al2O3 ceramic, Al and FeAl intermetallic compound layer in turn. The adhesions among all the layers are strengthened because the ceramic layer formed at the Al surface originally, FeAl intermetallic compound layer and substrate are combined in metallurgical form through mutual diffusion during HDA process.Initial experiment results disclose that the anti-corrosion performance and wear resistance of composite coating are obviously improved through HDA/MPO treatment.
出处
《中国有色金属学会会刊:英文版》
CSCD
2004年第z1期310-314,共5页
Transactions of Nonferrous Metals Society of China
基金
Project(50071066) supported by the National Natural Science Foundation of China
Project(B41) supported by the Doctoral Foundation of Yanshan University, China
Project(YDJJ: 0169) supported by the Science & Technology Foundation of Yanshan University, China