Abstract
The surface roughness of austenitic (304), martensitic (410) and ferritic (430) grades of stainless steels have been measured after fine emery paper grinding. The surface integrity of the ground samples were further examined in SEM. Metal removal during emery paper grinding occurred by rubbing, ploughing, micro cracking and gouging out of metal grains. The rate of corrosion/year, as determined through potentiostat test in 0.9 N NaCl solution, increased with surface roughness but it was insignificant in case of the metallographically polished samples of all the stainless steels. Corrosion progressed fast from the grinding pits on the stainless steel sample surfaces.
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