PENGARUH PROSES PENGEROLAN DINGIN TERHADAP KETAHANAN KOROSI STAINLESS STEEL 316L SEBAGAI MATERIAL IMPLAN MEDIS

• Main Author: NUGRAHA, ANDI
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/59324
• Institution: Institut Teknologi Bandung

Medical implant devices are devices used to support or replace damaged and substandard body organs. One of the common materials used for medical implant devices is stainless steel type 316L. This type of stainless steel has an excellent resistance to corrosion in saline. However, before applied, this type of stainless steel has to be formed first. The forming process commonly used to this type of stainless steel is cold working. The cold working process is intended to strengthen the material. This study is going to observe the influence of cold working on the resistance to corrosion in stainless steel 316L as an implant material. Test solution used in this study is the Hank’s physiological solution, while the cold working process utilized is cold rolling. The expected results of this study are the form of corrosion and the cold work strengthening phenomenon. The corrosion testing conducted in this study is done by the potentiodynamic polarization method and Tafel Polarization method. The form of corrosion is observed through optical microscope and SEM-EDS. The cold work strengthening phenomenon is observed through hardness testing. Based on the obtained data, the stainless steel processed through cold working experiences increase in the material strength, and decreasing on corrosion rate along with the increase of deformation degree. This is caused by increasing of passive film stability on the surface because of cold working given on it. While corrosion attack that happens is pitting corrosion on the surface.