本研究針對316L 不銹鋼在經由不同的電化學拋光條件處理之後，試片表面特性的探討。在電化學拋光的電解液中加入不同濃度的非離子界面活性劑，藉由界面活性劑能降低溶液的表面張力的特性，提升電化學拋光的速率。從V-I curve可以發現電拋光的電流密度會隨界面活性劑濃度增加而上升；而根據光學顯微鏡的表面型態觀察與AFM 測量的表面粗糙度（RMS roughness）值比較發現，當電解液中界面活性劑濃度超過20 ppm以上，拋光後的316L 不銹鋼表面平整程度都可以獲得改善；而在酸性溶液中的抗腐蝕比較也發現，在電解液中加入界面活性劑，可以使電拋光後的316L 不銹鋼試片具有與經過較長電拋光時間的試片相同的改善效果；XPS的分析解果顯示，在電解液中加入界面活性劑，可以使電拋光後的316L 不銹鋼試片表面有較高的Cr/Fe值而增強抗腐蝕能力；在纖維細胞生長實驗中，經過拋光處理的316L不銹鋼表面在具有較多的細胞數量，表示平坦的316L不銹鋼表面有利細胞生長，另一方面，在細胞型態的觀察結果發現，表面粗糙度降低會使得細胞貼附的情況變差。

Electropolishment is the most important surface treatment procedure for medical grade AISI 316L stainless steel. A lot of new investigations focus on improving this technology with additional equipment, such as external magnetic field. Unlike those procedures, we simply modified the electropolishing procedure by introducing surfactant into the bath. With the addition of surfactant, the surface morphology and corrosion resistance of 316L stainless steel were improved after the electropolishing process.
In this study, atomic force microscope (AFM), scanning electron microscope (SEM), as well as X-ray photoelectron spectroscopy (XPS) is employed to characterize the surface finish of the electropolished 316L pieces. Proper dosage of surfactant is introduced in the bath used in the electropolishing process to give better finish surface. The electrochemical corrosion behavior of 316L stainless steel was investigated in 1.0 N hydrochloric acid. The results showed that the presence of surfactant was found not only to smooth the surface but also decrease the corrosion rate. Furthermore, the results cellular adhesion and proliferation on the stainless steel surface film have been presented.

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