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Effect of Bismuth Addition on the Zinc Consumption in Hot-Dip Galvanizing
김선규(S. K. Kim),유정식(J. S. Yoo) 한국표면공학회 2002 한국표면공학회지 Vol.36 No.1
Hot-dip galvanizing process is used widely in industry to achieve corrosion resistant coatings. Poor drainage during this process often leads to problems such as icicle formation and bridging. In this work, mild steel specimens were hot-dip galvanized. Influence of the addition of bismuth, aluminum and both (bismuth and aluminum) to the zinc bath on the zinc drainage were determined. Bismuth additions improved the drainage significantly. Zinc bath containing 0.1 wt.% Bi and 0.025~0.05 wt.% Al showed uniformity of coatings. Industrial trials with this bath composition showed reduction in zinc consumption, reduction of ash and dross, and good luster of workpiece.
ECT System for Inspection of Main shaft of Washing Machine with or Without Heat Treatment
K. H. Im(임광희),J. Y. Kim(김진영),S. B. Han(한수빈),S. H. Shin(신승희),J. H. Kim(김종혁),H. R. Lee(이현로),D. M. Choi(최동민),S. K. Kim(김선규),Y. T. Cho(조영태),S. W. Seo(서상원) Korean Society for Precision Engineering 2019 한국정밀공학회 학술발표대회 논문집 Vol.2019 No.5월