Effect of Trace Metallic Additives of Mg-Fe-X on Microstructure and Properties of Zn Electrodeposits
아연도금층의 조직 및 물성에 미치는 미량금속원소(Mg-Fe-X)의 복합첨가의 영향(II)
예길촌;김대영;안덕수;
영남대학교 재료금속공학과;영남대학교 재료금속공학;동부제강 기술연구소;
The effect of trace metallic additives on microstructure, glossiness and hardness of Zinc electrodeposits was investigated by using sulfate bath and flow cell system. The preferred orientation of Zn deposits with Mg-Fe additives was (10$ell$)+(002) mixed texture, while that of Zn deposits with Mg-Fe-Cr additives was ( $10ell$). The preferred orientation of Zn deposits with Mg-Fe-X(X:Ni,Co) additives changed from ($10ell$)+(002) to ($10ell$) with increasing Mg additive from 5 to 10 g/$ell$. The surface morphology of the Zinc deposits was closely related to the preferred orientation of the deposits. The glossiness of Zn deposits with Mg-Fe additives was similar to that of pure Zn deposit. The glossiness of Zn deposits with Mg-Fe-X(X:Ni,Cr) additives was lower than that of Zn deposits with Mg-Fe additives, while that of Zn deposits with Mg-Fe-Co additives was higher than that of Zn-Mg-Fe deposits. The hardness of Zn deposits with Mg-Fe-X(Ni,Co,Cr) increased with current density and amount of Mg additive. Hardness of Zn deposits was decreased and increased in comparison with Zn-Mg-Fe deposits for Mg-Fe-Co and Mg-Fe-Cr additives, respectively.
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