Effect of surface mechanical attrition treatment (SMAT) on zinc phosphating of steel

Kavitha, C and Ravichandran, K and Sankara Narayanan, T S N (2014) Effect of surface mechanical attrition treatment (SMAT) on zinc phosphating of steel. Transactions of the Institute of Metal Finishing, 92(3) (IF-0.747). pp. 161-168.

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The effects of surface mechanical attrition treatment (SMAT) of EN8 steel on the growth of phosphate coatings, morphological features and corrosion resistance of the resultant coatings have been studied. SMAT enabled the formation of a uniform surface profile although the average surface roughness is increased after treatment. SMAT increased the extent of metal dissolution and the rate of growth of phosphate coating. In spite of the similarity in phase composition, the phosphate crystallite size is relatively high for samples treated by SMAT. Compared to the untreated one, a cathodic shift in E-corr with a corresponding decrease in i(corr) is observed for SMAT treated EN8 steel after phosphating. For all tested samples, zinc phosphate coatings deposited on EN8 steel after SMAT using 8 mm O balls for 30 min offers the highest corrosion resistance. The increase in surface roughness by SMAT is partly compensated by the expected improvement in corrosion resistance

Item Type:Article
Official URL/DOI:http://eprints.nmlindia.org/6863
Uncontrolled Keywords:Surface mechanical attrition treatment; Phosphating; Surface roughness; Corrosion resistance; Potentiodynamic polarisation
Divisions:Material Science and Technology
ID Code:6863
Deposited By:Sahu A K
Deposited On:12 Jul 2014 07:52
Last Modified:04 May 2016 14:08
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