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논문 : 부식환경 ; 알칼리 수용액에서 Zr 합금의 산화막 성장기구
정용환 ( Y. H. Jeong ),백종혁 ( J. H. Baek ),김선재 ( S. J. Kim ),김경호 ( K. H. Kim ),최병권 ( B. K. Choi ),방제건 ( J. G. Bang ) 대한금속재료학회 ( 구 대한금속학회 ) 1998 대한금속·재료학회지 Vol.36 No.7
The autoclave corrosion test was performed on the zirconium alloys in various aqueous solutions of LiOH, NaOH, KOH, RbOH, and CsOH, The oxide growth mechanism at metal-oxide interface was evaluated using SEM on the samples which were prepared to have an equal oxide thickness at pre-transition regime and post transition regime. At a low concentration (4.3 mmol), the corrosion rate was gradually decreased as the ionic radius of cation increased. However. at a high concentration (32.5 mmol). the corrosion rate was significantly accelerated in LiOH solution and slightly in NaOH solution. The morphologies and the growth rates of the oxides at metal-oxide interface were dependent on the ionic radius of cation even if the samples have an equal oxide thickness in LiOH, NaOH, and KOH, The grain orientation in Zr matrix also controlled the growth rates and the morphologies of the oxides. Therefore. It is considered that the oxide growth mechanism of Zr alloys can be controlled by the cation incorporation into zirconium oxide.