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Indexed by:期刊论文

Date of Publication:2010-12-01

Journal:CORROSION ENGINEERING SCIENCE AND TECHNOLOGY

Included Journals:SCIE、EI、Scopus

Volume:45

Issue:6

Page Number:475-479

ISSN No.:1478-422X

Key Words:Composite SiO2 thin film; Modified hydrothermal method; Anticorrosion; Deposition; Lithium bromide; Silicon

Abstract:A Fe/Cr doped SiO2 thin film which can improve the anticorrosion characteristic of materials was prepared on SUS304 stainless steel substrates by a modified hydrothermal method which constitutes two parts of preparation process. The corrosion of stainless steel stimulated by aqueous Lithium bromide solution and the dissolution of silica from Na-Ca glass simultaneously. And then a Fe/Cr doped SiO2 thin film is coated onto the substrate. The Fe/Cr doped SiO2 film was characterised by scanning electronic micrographs, X-ray diffraction, X-ray photoelectron spectroscopy and Electron probe X-ray microanalyser. Results showed that the corrosion products M Xz, M(OH) xz (M: metal) and the silica reticular are combined to form a Fe/Cr doped SiO2 thin film. Furthermore, a chemical bond formed between silicon reticular and metal ions to improve the compactness and the adhesive property of the film. The anticorrosion characteristics of the film were measured by the methods of weight loss and electrochemical potentiodynamic polarisation, indicating that the Fe/Cr doped SiO2 thin film can improve the anticorrosion performance of stainless steels effectively.