Thammaratt Pechakrue creator Bohez, Erik L.J. Chairperson Ullah, A.M.M. Sharif Examination Committee Anulark Techanitisawad Examination committee Jintamai Suwanprateeb Examination committee AIT Partial Scholarship Scholarship donor text series technical report th Bangkok Asian Institute of Technology 2002 continuing eng 69 p. This research determines the optimum method and conditions for improving the surface quality of the Gamma nail to prevent the conosion by using the electrochemical polishing process. In the electrochemical polishing process, there are three parameters, (1) Electrical Voltage (2) Electrolyte Temperature and (3) Time. This process creates a passive film on the stainless steel surface to prevent the corrosion. This study starts with design of the experiment, prepare the samples, run the electrochemical polishing in difference conditions and test the corrosion of the samples and compare with the mechanical polishing. The result shows that the passive film of the mechanical polishing sample is weaker than the passive film of the electrochemical polished samples. The result shows that electrochemical polishing is needed for increasing the corrosion protection. A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering, School of Advanced Technologies Thesis (M.Eng.) - Asian Institute of Technology, 2002 Steel Corrosion Electrolytic corrosion Asian Institute of Technology. http://203.159.5.9/ait-thesis/detail.php?q=B08125 http://203.159.5.9/ait-thesis/detail.php?q=B08125 030620 20260817162853.0