Effects of Single Pass and Multipass Welding on Austenitic Stainless Steel Corrosion in Aggressive Environments.
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Date
2017
Authors
Osoba, L.O.
Okeniyi, J.O.
Pogoson, B.I.
Fasuba, O.A.
Journal Title
Journal ISSN
Volume Title
Publisher
Gazi University Journal of Science
Abstract
This study investigates single pass and multipass (three-pass) welding effects on 304 austenitic
stainless steel (ASS) corrosion in acidic/saline environments, to enable a better understanding of
the influence of heat affected zone (HAZ) on ASS corrosion susceptibility in the selected
commonly used aggressive environments. Tungsten Inert Gas (TIG) welding process was used
to weld the samples using 308 stainless steel filler. The corrosion behaviour of the welded
samples was evaluated using immersion and potentiodynamic polarization tests. Immersion test
evaluation and the analysed results showed that the single pass welds exhibited lower corrosion
susceptibility in the acidic environments (H2SO4, HNO3) than in the multipass welded ASS. In
contrast, using potentiodynamic polarization evaluation, the multipass welded sample, exhibited
lower corrosion susceptibility than the single pass welded ASS in HNO3 environment.
Essentially, the same trend of corrosion susceptibility was recorded in NaCl environments
irrespective of the evaluation method.
Description
Keywords
Austenitic stainless steel corrosion Single and multipass welding Corrosion test-data analyses Acidic and saline environments
Citation
Osoba, L.O.; Okeniyi, J.O.; Pogoson, B.I.; Fasuba, O.A. (2017). Effects of Single Pass and Multipass Welding on Austenitic Stainless Steel Corrosion in Aggressive Environments. GU J Sci 30(4): 514-529.