Effect of Surface Treatment on Corrosion Resistance of 304 Stainless Steel Implants in Tyrode Solution

Archives of Metallurgy and Materials

Z. Ahmadian¹  I. Danaee¹  M.A. Golozar² 

[1] ABADAN FACULTY OF PETROLEUM ENGINEERING, PETROLEUM UNIVERSITY OF TECHNOLOGY, ABADAN, IRAN;DEPARTMENT OF MATERIALS ENGINEERING, ISFAHAN UNIVERSITY OF TECHNOLOGY, ISFAHAN, IRAN

关键词: Keywords: Electrolytic polishing;    Chemical passivation;    304 Stainless steel;    AFM;   

DOI  :  10.2478/amm-2014-0004

学科分类：金属与冶金

来源: Akademia Gorniczo-Hutnicza im. Stanislawa Staszica / University of Mining and Metallurgy

【 摘 要 】

The effect of different surface preparation methods such as mechanical, chemical and electrochemical surface preparation on the formation, stability and deterioration of surface films formed on austenitic 304 stainless steel was investigated in Tyrode’s physiological solution by cyclic polarization curves, AC impedance measurements surface techniques. A hysteresis loop in a cyclic polarization curve was obtained that indicates a delay in repassivation of an existing pit when the potential is scanned cathodically. Electrolytic polishing and ultrasonic cleaning improves corrosion resistance by increasing the value of the corrosion potential and breakdown potential of the passive layer as well as the pit initiation potential. After mechanical polishing no perfect passivation region was observed. Change in surface fractal is in good agreement with the result obtained from height roughness factor of AFM.

【 授权许可】

Unknown