Abstract

Coating involves the application of a thin film of functional material to a substrate, such as paper, fabric, film, foil or sheet stock. Coatings may be applied as liquids, gases or solids. Coatings can be measured and tested for proper opacity and film thickness by using a draw down card. Friction surfacing is a solid-state process. The soft material (Tool) is weared out by mechanical action due to friction generated between rotating work piece and stationary tool. The tool material is deposited on work piece. The work piece material is selected as hard material than the tool material. The parameters selected in this process are speed, feed and forward time. The hardness is tremendously improved by increased feed and keeping speed and forward time at lower level. Similarly, the lower hardness is observed at lower level of the feed. It is also observed that, corrosion resistance is fairly good at the condition of all parameters in low level condition. As per the regression analysis the individual parameters of feed and forward time contributes maximum to improve the corrosion resistance where as speed contributes minimum. The interaction parameters of speed and feed results maximum contribution to improve the corrosion resistance where as interaction parameters of speed and forward time contributes minimum. In case of surface roughness, the individual parameters of speed, feed and forward time contributes minimum to the surface roughness. The interaction parameters of speed and forward time contributes maximum to improve the surface roughness. It is also observed that, coating thickness is improved greater at all parameters in higher level and also studied optical microstructural analysis at the interface

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