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Vol. 27, Special Issue, May 2014, pp. 174-179

 

Bullet

 

V and Nb Influence on the Austenitic Stainless Steel Corrosion in 0.1 M HCl
 

Amel GHARBI, Kamel MADDOURI, Abdelaziz HIMOUR, Sihem ABDERRAHMANE and Sameh ATHMANI

Surface Engineering Laboratory (L.I.S), Badji Mokhtar University, B.P.12-23000, Annaba, Algeria
Tel.: +213 (0) 670 05 67 20, fax: +213- 38 86 14 16

E-mail: ahimour@yahoo.fr

 

Received: 31 December 2012 /Accepted: 10 August 2013 /Published: 26 May 2014

Digital Sensors and Sensor Sysstems

 

Abstract: Vanadium and niobium were added in AISI309 austenitic stainless steel composition to modify their structure and pitting corrosion resistance in 0.1 M HCl. The structural characterization was carried out by X-rays diffraction and optical microscopy. Corrosion behavior was investigated using potentiodynamic tests and electrochemical impedance measurements (EIS) .Results showed that vanadium and niobium addition precipitated stable carbides (VC, NbC) to chromium carbides’ detriment and improved austenitic stainless steel corrosion resistance.

 

Keywords: Stainless steel, Intergranular precipitation, Corrosion, Vanadium, Niobium, EIS.

 

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