The growth mechanism of the coloured passive film formed on 304 stainless steel in sulfuric solution without Cr6+ ion by using AV passivation

Authors
Zhang, JX Chen, J Qiao, YN Cao, CN
Citation
Jx. Zhang et al., The growth mechanism of the coloured passive film formed on 304 stainless steel in sulfuric solution without Cr6+ ion by using AV passivation, T I MET FIN, 77, 1999, pp. 106-107
Citations number
7
Categorie Soggetti
Metallurgy
Journal title
TRANSACTIONS OF THE INSTITUTE OF METAL FINISHING
ISSN journal
00202967 → ACNP
Volume
77
Year of publication
1999
Part
3
Pages
106 - 107
Database
ISI
SICI code
0020-2967(199905)77:<106:TGMOTC>2.0.ZU;2-C
Abstract
A thick passive film showing interference colours has been obtained on 304 stainless steel in sulfuric acid solution without Cr6+ ions by applying alt ernating square wave polarization. An investigation of the chemical composi tion and the distribution of valence states in the profile of the film has been carried out by using XPS. A mechanism for the colouring process is pro posed.