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Paper Information

Journal:   IRANIAN JOURNAL OF SURFACE SCIENCE AND ENGINEERING   AUGUST 2007 , Volume - , Number 3; Page(s) 25 To 36.
 
Paper: 

COMPARISON BETWEEN CORROSION RESISTANCE OF ORDINARY AND SKIN PASSED HOT-DIP GALVANIZED COATING

 
 
Author(s):  ASGARI H., TOROGHINEZHAD M.R., GOLAZAR M.A.
 
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Abstract: 
In this study, corrosion resistance of ordinary (non-skin passed) and skin passed hot-dip galvanized steel sheets produced in Mobarakeh steel company was compared with each other. For this reason, lead content of the zinc bath was changed from 0.01 wt.% to 0.11wt.% and the corrosion resistance of the sheets was analyzed. Also, to study the effects of skin pass rolling on the corrosion resistance of the sheets, two skin passed specimens obtained from zinc baths of 0.045 and 0.065 wt.% of lead content were studied. Effect of lead content of the zinc bath and skin pass rolling on (00.2) basal texture component were also investigated. Relative intensity of (00.2) basal texture component was determined using XRD whilst the corrosion behaviour was analyzed employing Tafel polarization test. Results showed that increasing the lead content of the zinc bath would decrease the corrosion resistance and (00.2) basal texture component relative intensity of ordinary coating and conversely, increase the spangle size and darkness of the coating surface. Investigation on the effects of skin pass rolling on the galvanized sheets indicated that in this case, relative intensity of (00.2) basal texture component and spangle size have been decreased and some cracks created in the coating. In addition, it was seen that the corrosion resistance of skin passed specimens, in comparison with ordinary specimens, has been decreased.
 
Keyword(s): HOT-DIP GALVANIZING, SKINPASS ROLLING, BASAL TEXTURE COMPONENT, CORROSION RESISTANCE
 
References: 
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