ガラス表面に対する応力腐食作用のビッカース圧子押込み法による定量的評価(第3報) : XPSによる検討

概要

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The suppressing of effect Zn^<2+> and Co^<2+> ions on stress corrosion of a glass surface was investigated in 10^<-3> mol/dm^3 Zn(NO_3)_2 and Co(NO_3)_2 aqueous solutions at various pHs. The mechanism behind this effect was clarified by measuring the stress corrosion limit (K_<SCC>), the pH of the solution, concentration of ions, and by surface analysis of glass using X-ray Photoelectron Spectroscopy (XPS). The suppression of stress corrosion in Zn(NO_3)_2 solution increases to some extent with increase in the amount of Zn^<2+> reacted with glass surface, which suggests that the amount of zinc hydroxide precipitated on the glass surface is associated with the extent of corrosion. However, in Co(NO_3)_2 solution a suppressing effect of corrosion was not as large as that in Zn(NO_3)_2 solution. Since XPS results showed that the amounts of cobalt hydroxide precipitated on the glass surface was almost the same as that of zinc hydroxide, the difference of the suppression of stress corrosion (K_<SCC>) may be caused by the difference of population of Si-O^- site existing in surface of the glass due to a higher pH used for the precipitation of Co^<2+> as compared with Zn^<2+> precipitation.
社団法人日本セラミックス協会の論文
2000-01-01