COLD SEALING MECHANISM OF ANODIC OXIDE-FILMS ON ALUMINUM .1. COMPOSITION AND STRUCTURE OF COLD-SEALED OXIDE-FILMS

Authors
LI Y ZHU ZF JIANG ZY YAN MM
Citation
Y. Li et al., COLD SEALING MECHANISM OF ANODIC OXIDE-FILMS ON ALUMINUM .1. COMPOSITION AND STRUCTURE OF COLD-SEALED OXIDE-FILMS, Plating and surface finishing, 80(9), 1993, pp. 79-82
Citations number
14
Categorie Soggetti
Metallurgy & Mining
Journal title
Plating and surface finishing → ACNP
ISSN journal
03603164
Volume
80
Issue
9
Year of publication
1993
Pages
79 - 82
Database
ISI
SICI code
0360-3164(1993)80:9<79:CSMOAO>2.0.ZU;2-9
Abstract
The composition and structure of cold-sealed anodic oxide films on alu minum formed in sulfuric acid solution were investigated by means of X -ray diffraction, infrared spectroscopy, thermogravimetry and differen tial thermal analysis. Oxide films are mainly composed of amorphous al umina, and also contain sulfate. Boehmite (AlOOH), nickel hydroxide [N i(OH)2], and aluminum fluoride (AlF3) are formed in cold sealing. Fina lly, the mechanism of the cold sealing reaction is discussed.