Zairyo-to-Kankyo
Online ISSN : 1881-9664
Print ISSN : 0917-0480
ISSN-L : 0917-0480
Humid-environment Corrosion of Nickel and Water Vapor Adsorption on Its Corrosion Products
Kazumi FujiiShiro KobayashiMasahiko ItoNoriyuki Ohnaka
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1994 Volume 43 Issue 7 Pages 378-384

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Abstract

Humid-environment corrosion of nickel and water vapor adsorption on its corrosion products were investigated at temperatures from 40° to 80°C, relative humilities from 50 to 95% and SO2 concentrations from 0 to 20ppm. Quartz crystal microbalance (QCM) was used to determine the corrosion rate, and X-ray photoelectron spectroscopy (XPS) was used to determine the composition of corrosion products. Corrosion kinetics for nickel without SO2 pollutant was described by cubic rate law. On the other hand, corrosion kinetics containing SO2 more than 1ppm was linear. Dependence on relative humidity of corrosion rate was same as adsorption isotherm by Frenkel-Halsay-Hill theory on its corrosion product. Dependence on ralative humidity of corrosion rate was discussed in connection with adsorption behavior of water.

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© Japan Society of Corrosion Engineering
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