Investigation of Surfactant on Removal of Contamination from Slider Bar and Impact of Surfactant Temperature on Metal Corrosion

This study investigates the impact of nonionic surfactant on removal of contamination and also investigates the impact of surfactant temperature on slider bar corrosion. The experiments were carried out for various ultrasonic frequencies, sonication time, sonication power and surfactant temperatures. Different parts of corrosion suspect parts were analysed to identify the corrosion by using nano scanning electron microscope SEM technique. Potentiostat tests were carried out to identify the corrosion potential for different surfactant temperatures. From experimental results, it can be observed that the corrosion rate was slightly higher for 60 οC surfactant temperature as compared to 25 οC. The results indicates that the removal efficiency of glue contamination and other particulate contamination improved from 67 % (Surfactant temperature 25 οC) to 85 % (Surfactant temp 55 οC) but when the temperature was over 55 οC the removal rate was decreased. This is due to the fact that at temperature around 50-55 οC the solubility of surfactant in water is higher and therefore the surfactant becomes more active. At higher temperature (more than 55 οC) the solubility of surfactant in water is poor. The surfactant seperates out from water and the liquid becomes cloudy. When the surfactant temperature exceeds the cloud point, the effect of surfactant is lowered. From data it can also be seen that 2 % surfactant concentration gives higher removal efficiency as compared to other concentration levels. From SEM analysis, no slider bar corrosion was found for both 25 and 60 οC surfactant temperature. The optimum sonication time and ultrasonic power obtained was 3 min and 250W respectively