Formation mechanism of pulse current anodized film on AZ91D Mg alloy

Qian, Jian-gang, Wang, Chun, Li, Di, Guo, Bao-lan and Song, Guang-ling (2008) Formation mechanism of pulse current anodized film on AZ91D Mg alloy. Transactions of Nonferrous Metals Society of China, 18 1: 19-23. doi:10.1016/S1003-6326(08)60004-7


Author Qian, Jian-gang
Wang, Chun
Li, Di
Guo, Bao-lan
Song, Guang-ling
Title Formation mechanism of pulse current anodized film on AZ91D Mg alloy
Journal name Transactions of Nonferrous Metals Society of China   Check publisher's open access policy
ISSN 1003-6326
Publication date 2008-02
Sub-type Article (original research)
DOI 10.1016/S1003-6326(08)60004-7
Volume 18
Issue 1
Start page 19
End page 23
Total pages 5
Place of publication Changsha, China
Publisher Nonferrous Metals Society of China
Language eng
Subject 09 Engineering
Abstract The kinetics of forming process of pulse current anodized film on AZ91D Mg alloy was studied by the voltage—time and thickness—time curves. The surface morphology, structure, elemental constitution and valences of the anodic films were analyzed by SEM, EDS, XPS and XRD respectively. The results show that the film-forming process can be divided into four stages. Formation of a dense layer before sparking is the first stage. Formation of a porous layer accompanied with slight sparking is the second stage. The third stage is characterized by fast growth of the porous layer accompanied with more intensive sparking. The fourth stage starts after the sparking process becomes even more vigorous and the pores become large.
Keyword Mg alloy
pulse anodizing
film-forming process
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Excellence in Research Australia (ERA) - Collection
School of Mechanical & Mining Engineering Publications
 
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