Shandong Science ›› 2019, Vol. 32 ›› Issue (4): 32-37.doi: 10.3976/j.issn.1002-4026.2019.04.005

• New Materials • Previous Articles     Next Articles

Study on the overall plasma electrolytic oxidation of the AZ31 magnesium and 7075 aluminum connected parts

WANG Mei-fang1,SONG Xiao-cun1*,ZHOU Ji-xue1,CHEN Yan-fei 2,LIU Hong-tao1,YANG Yuan-sheng3   

  1. 1.Advanced Materials Institute, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250014 ,China; 2.Ganzhou Nonferrous Metallurgy Research Institute,Ganzhou 341400, China;3.Institute of Metal Research Chinese Academy of Sciences,Shenyang 110016, China
  • Received:2018-11-22 Online:2019-08-20 Published:2019-08-07

Abstract: Non-equilibrium plasma reaction can occur because different materials exhibit different properties;this increases the difficulty associated with the preparation of an overall protective coating.The objective of this experiment is to obtain an overall surface-protecting technology for the magnesium-aluminum connected parts.This study prepares an overall ceramic coating on the surface of the AZ31-7075 connected part based on the existing experimental consideration.Furthermore,deep analysis is applied to the specimens after 3,7,and 10 min of treatment.The results denote that the plasma oxidation sequence is related to the physical and chemical activities of different materials.The chemically active metal preferentially undergoes a ceramization reaction,which causes non-equilibrium growth of the ceramic coating.Preparing an overall ceramic coating for AZ31-7075 is of considerable significance to enrich the growth mechanism of the ceramic coating and the imbalanced growth mechanism of the connected parts of dissimilar metals.

Key words: overall plasma oxidation, ceramic coating, dissimilar metal welded parts, magnesium, aluminum

CLC Number: 

  • TG174.453