Journal of Applied Sciences1812-56541812-5662Asian Network for Scientific Information10.3923/jas.2008.1912.1918Al-AjlouniM. Al-HamdanA. 102008810During the work of this research, designing, building and testing of an electropolishing cell has been carried out. Various tests have been performed for three different materials namely, steel, aluminum and brass at different environment conditions in order to a better evaluation of electropolishing. These conditions include the effect of concentration of electrolytes, electrolytes temperature, power supplied and machining time. The results of these tests have been analyzed and performance curves have been drawn. The optimum temperatures and the optimum time have been obtained at which the maximum metal removal and the best surface quality is achieved. These temperature and time for Aluminum, Brass and Steel are T = 60, 50 and 75°C, t = 20, 40 and 50 min, respectively. Surface roughnesses of the specimens have been measured before and after electropolishing. The results showed a significant improvement that effect positively on strength, fatigue resistance and corrosion resistance. Many important conclusions have been extracted from these performance curves and some recommendations have been noted to help in future works.]]>Abbott, A.P., G. Capper, K.J. McKenzie and K.S. Ryder, 20065144204425Andrade, L.S., S.C. Xavier, R.C. Rocha-Filho, N. Bocchi and S.R. Biaggio, 20055026232627Aspart, A., F. Eozenou and C. Antoine, 2006441249253Callister, W.D., 19974th Edn.,pp: 520-534pp: 520-534Durkee, J.B., 20031015964Fushimi, K., M. Stratmann and A.W. Hassel, 20062SO4.]]>5212901295Guo, W. and D.T. Johnson,2004268258271Hocheng, H. and P.S. Pa, 20005715Hocheng, H. and P.S. Pa, 2002120612Hocheng, H. and P.S. Pa, 2003142203212Hollywood, N., 20062006Hu, Y.N., H. Zhou, L.P. Liao and H.B. Deng,2003139253256Jones, T., 20041024557Kalpakjian, S. and S.R. Schmid, 20075th Edn.,Landolt, D., P.F. Chauvy and O. Zinger, 20034831853201Lee, S.H.J. and J.J. Lai,2003140206210MPC,20072007Roy, S., A. Bhattacharyya and S. Banerjee, 20074013871393Wu, A.T., J. Mammosser, L. Phillips, J. Delayen and C. Reece et al.,200725330413052Wynick, G.L. and C.J. Boehlert, 200555190202Yu, C.U., C.C. Hu, A. Bai and Y.F. Yang, 200720172597265Kao, P.S. and H. Hocheng,2003140255259