Volume 2, Issue 2 (Journal OF Welding Science and Technology of Iran 2016)                   JWSTI 2016, 2(2): 84-91 | Back to browse issues page

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Lashkari Ghoochani M, Beidokhti B. Investigation on the corrosion behaviour of 420 welding martensitic steel with the ER308L, ER309L and ER420 fillers studied in 3.5% NaCl solution with and without CO2. JWSTI 2016; 2 (2) :84-91
URL: http://jwsti.iut.ac.ir/article-1-100-en.html
Investigation on the corrosion behaviour of 420 welding martensitic steel with the ER308L, ER309L and ER420 fillers studied in 3.5% NaCl solution with and without CO2
Mahdi Lashkari Ghoochani , Behrooz Beidokhti * 1
1- , b.beidokhti@gmail.com
Abstract:   (8196 Views)

In this research 420 martensitic stainless steel welded with the ER308L, ER309L and ER420 fillers by GTAW method. The corrosion properties of  the samples has been studied in 3.5% NaCl solution with and without CO2. Potentiodynamic polarization used to obtain the ER308L and ER309L have the best corrosion properties. In addition the welding process makes the 420 HAZ zone to be sensitized. The pitting potential of the samples has been decreased in presence of carbon dioxide. Furthermore, by adding CO2 to the solution the pH has been decreased and the corrosion potential reached near the -500 mV/SCE and the passivity current is also lowered.

Keywords: Corrosion, Welding, Stainless steel, Martensit, Potentiodynamic polarization
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Type of Study: Research | Subject: Special
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