Journal of the Korean institute of surface engineering (한국표면공학회지)
- Volume 33 Issue 5
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- Pages.387-397
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- 2000
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- 1225-8024(pISSN)
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- 2288-8403(eISSN)
Effects of Antimony and Lead in Galvanizing Bath on Spangle Formation in Galvanized Steel Sheet Coatings
용융아연도금강판의 스팡글 형성에 미치는 도금욕 중 안티몬 및 납의 영향
Abstract
Antimony in the galvanizing bath had greater effect on the growth of grains in the solidification of molten coating layer and on the decrease of its surface roughness than lead. Particularly 0.01 wt % antimony in the galvanizing bath showed much stronger effect than expected considering its low surface tension value. These effects were seemingly originated from the development of preferred orientation of (0002) plane parallel to steel surface. Antimony was found to be widely distributed in form of orderly arrangement throughout the coating layer unlike lead from the results of surface analyses on coating layers as received and on those as etched in chromating solution. In addition, supercooling in the 0.07 % antimony and the 0.2 % lead galvanizing bath was also measured to be in the range of
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