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Electrochemical study of AISI 316L Stainless Steel in different nanoparticle suspensions

A.-M. CANTARAGIU1,* , G. CARAC2, C. GHEORGHIES3

Affiliation

  1. Faculty of Mechanics, Dunarea de Jos University, Galati, 800008, Romania
  2. Department of Chemistry, Faculty of Sciences, Dunarea de Jos University, Galati, 800008, Romania
  3. Department of Physics, Faculty of Sciences, Dunarea de Jos University, Galati, 800008, Romania

Abstract

The aim of this paper is to study the corrosion behaviour of AISI 316L Stainless Steel (SS) in various solutions with nanoparticle suspensions by electrochemical testing. It is very important to determine the chemical reactivity of AISI 316L SS in the presence of some aqueous solutions in order to characterize the biocompatibility with the human body. The tested corrosive environments are: demineralised and deionised water at different immersion times, aqueous solution of 0.1 or 0.2 g/l TiO2 as well as aqueous solution of 0.1 or 0.2 g/l Al2O3. The measurements at room temperature were made in a conventional three-electrodes chemical cell, using a platinum electrode, a calomel and an AISI 316 SS as working electrode. The corrosion process was examined by linear polarization (LP) using a Bio-Logic potentiostate. For the LP measurements the potential ranged between –1.15÷1.13 V vs. SCE. The immersion time before each measurement was 60 sec. to assess an equilibrium open potential. From the LP curves, the corrosion potential and parameters such as corrosion current, the polarisation resistance and corrosion rate are determined. Under certain circumstances, the results show that the nanoparticle suspensions act as a protective layer on the AISI 316L SS sample surface..

Keywords

Stainless steel, Alumina, Titania, Corrosion rate, Polarization resistance.

Submitted at: Nov. 3, 2010
Accepted at: Nov. 25, 2010

Citation

A.-M. CANTARAGIU, G. CARAC, C. GHEORGHIES, Electrochemical study of AISI 316L Stainless Steel in different nanoparticle suspensions, Journal of Optoelectronics and Advanced Materials Vol. 12, Iss. 12, pp. 2391-2399 (2010)