| 초록 |
A new technique based on the use of supercritical carbon dioxide(SCCO2) to clean metal substrates was developed. To study the feasibility of this process, temperature, pressure, co-solvent and cleaning time were investigated. Due to characteristics of SCCO2 as, high diffusivity and near zero surface tension, a fast and complete removal of oil contaminants from metal substrates was certified. Cu, Carbon steel were selected as metal substrates that have trench on surface and mineral and Teflon lubricating oil were coated on metal trench as contaminants. Within the parameter range studied, cleaning efficiency generally improved when pressure, temperature are increased. When the co-solvent was added, removal efficiency of contaminant was improved. |
