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Corrosion Resistant ZrO2 Sol-Gel Coating on Stainless Steel

Published online by Cambridge University Press:  25 February 2011

M. Atik  and
M. A. Aegerter
M. Atik
Affiliation:
Laboratoire de Science des Matériaux Vitreux, Université des Sciences et Techniques du Languedoc, Place E. Bataillon, 34060 Montpellier, France Instituto de Fisica e Quimica de São Carlos, Universidade de São Paulo, Cx. Postal 369, 13560 São Carlos, SP, Brazil.
M. A. Aegerter
Affiliation:
Instituto de Fisica e Quimica de São Carlos, Universidade de São Paulo, Cx. Postal 369, 13560 São Carlos, SP, Brazil.
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Abstract

Corrosion resistant Sol-Gel ZrO2, coatings deposited by dip coating technique on 316 L stainless steel sheets have been fabricated utilizing sonocatalysed precursors sols prepared from zirconium alkoxide Zr(OC3H7)4, isopropanol, glacial acetic acid and water. Their composition varied between 0,025 to 0,9 mol/1 ZrO2. The coatings have been characterized by X-ray diffraction, IR optical reflection, ellipsometry and scanning electron microscopy. When densified under a slow heat treatment thin coatings exhibit outstanding corrosion resistance as no weight change has been observed after 24 h chemical attack in H2SO4 aqueous solution at 81°C and 10 h oxidation treatment in air at 800°C. Thick films as well as films densified under rapid heat treatments tend to crack and are less corrosion resistant.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 271: Symposium N – Better Ceramics Through Chemistry V , 1992 , 471
Copyright
Copyright © Materials Research Society 1992

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References

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