RESEARCH ARTICLE
Corrosion Behavior of Plasma Nitrided SS316L Biomaterial
Ratna Kartikasari1, *, Sutrisna1, Ihwanul Aziz2
Article Information
Identifiers and Pagination:
Year: 2017Volume: 11
First Page: 29
Last Page: 37
Publisher Id: TOMSJ-11-29
DOI: 10.2174/1874088X01711010029
Article History:
Received Date: 23/11/2016Revision Received Date: 28/04/2017
Acceptance Date: 19/05/2017
Electronic publication date: 31/07/2017
Collection year: 2017
open-access license: This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 International Public License (CC-BY 4.0), a copy of which is available at: (https://creativecommons.org/licenses/by/4.0/legalcode). This license permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Abstract
Objective:
This research aims to determine corrosion behavior of SS316L biomaterial metals after plasma nitriding process.
Methods:
The plasma nitriding process on the surface of SS316L was performed at 350oC, 400oC, 450oC, 500oC, 550oC and 1.8 mbar nitrogen gas pressure for 3 hours. The surface Nitrogen concentration level distribution from the surface was examined using Energy Dispersive X-ray Spectroscopy, the phases formed after nitriding process were determined using X-ray Diffraction. The corrosion resistance was investigated using three-electrode cell polarization method.
Result:
The results showed that the percentage of nitrogen concentration atoms on the surface of the SS316L after plasma nitriding process was in range of 7.61-21.73%, in which the highest number 21.73% occurred at 500oC. Metal nitride formed on the surface of SS316L for all temperature variations are Fe4N, CrN and β-Cr2N phases were formed after nitriding process. Optimum corrosion resistance (8.21 x 10-4 mm/yr) occurs at 350oC.