액체급냉법에 의해 제조한 비정질 Co-Nb-B 합금의 전기화학적 부식 특성
Electrochemical Corrosion Properties of Amorphous Co-Nb-B Alloys Prepared by Melt-Spinning Method
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초록
This study was undertaken to examine the electrochemical corrosion properties of an Co80Nb10B10 and Co82Nb8B10amorphous alloys prepared by melt-spinning method under various conditions. The potentiodynamic polarizationresponses at various levels of pH (pH 2, pH 7, pH 12) showed that the corrosion current rate of Co80Nb10B10alloy is lower than that of Co82Nb8B10 alloy in all levels of pH, implying the general corrosion resistance ofthe alloy with higher Nb content is better than that with higher Co content. The pitting potential of Co80Nb10B10alloy was also better than that of Co82Nb8B10, evidenced by the higher pitting potential. Nb is thought to beeffective in increasing the protectiveness of the passive film and hence to improve the corrosion resistance ofCo-Nb-B alloys.
Abstract
This study was undertaken to examine the electrochemical corrosion properties of an Co80Nb10B10 and Co82Nb8B10amorphous alloys prepared by melt-spinning method under various conditions. The potentiodynamic polarizationresponses at various levels of pH (pH 2, pH 7, pH 12) showed that the corrosion current rate of Co80Nb10B10alloy is lower than that of Co82Nb8B10 alloy in all levels of pH, implying the general corrosion resistance ofthe alloy with higher Nb content is better than that with higher Co content. The pitting potential of Co80Nb10B10alloy was also better than that of Co82Nb8B10, evidenced by the higher pitting potential. Nb is thought to beeffective in increasing the protectiveness of the passive film and hence to improve the corrosion resistance ofCo-Nb-B alloys.
참고문헌 (7)
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