Influence of force variations in skin pass rolling on texture and surface reactivity of hot dip galvanised low carbon steel sheets

Abstract

In this research work, the skin pass rolling force was changed in the range of 50 to 200 kN in steps of 30 kN. The crystallographic orientation of the coatings was determined using X-ray diffraction, and texture parameters were calculated. Corrosion behaviour was assessed employing the Tafel polarisation test. It was concluded that by increasing the force the texture coefficient of the basal planes component in the coating would be decreased and conversely, other components such as prismatic planes components would be strengthened. Increasing skin pass force would also cause an increase in surface roughness and microcracks in the coating. Such increasing in prismatic component texture coefficient, roughness and microcracks of the coating would result in the decreasing of coating corrosion resistance.