Surfactant solution cleaning of sintered powdered metals
Date of Original Version
In this study, the removal of water insoluble cutting oil from the micropores of three different sintered powder metals including bronze, aluminum, and steel using anionic and non-ionic surfactant solutions and an ultrasonic cleaning system was investigated. Addition of an electrolyte to an anionic surfactant solution showed a significant increase in the cleaning efficiency. Various parameters such as temperature, concentration of surfactant, concentration of electrolyte, power input, sonicating time, pore size, and percentage porosity were examined to determine the effect on the cleaning efficiency. Experimental curves of cleaning efficiency vs time for the three metals were compared both in a surfactant cleaning system and in an organic vapor degreasing system. A simple capillary model which assumes two constant diameter pores of different diameters which are joined at a given depth into the sintered metal was assumed to explain some results and to emphasis the important parameters in the cleaning process.
Advances in Powder Metallurgy
Doshi, Kaushik, D. J. Gray, and M. Ballou. "Surfactant solution cleaning of sintered powdered metals." Advances in Powder Metallurgy 4, (1992): 119-133. https://digitalcommons.uri.edu/che_facpubs/119