- Title
- Weld corrosion - an overview
- Creator
- Pearce, D.; Chaves, I. A.
- Relation
- Australasian Corrosion Association Annual Conference: Corrosion and Prevention 2015, ACA 2015 (2015). Proceedings of the Australasian Corrosion Association Annual Conference: Corrosion and Prevention 2015 (Adelaide, S.A. 15-18 November, 2015)
- Publisher
- Australasian Corrosion Association (ACA)
- Resource Type
- conference paper
- Date
- 2015
- Description
- Severe localized corrosion has long been considered the main cause for containment loss of steel assets such as pipes and tanks, particularly as caused by pitting corrosion on or around weld zones. The weld and heat affected zones for welds in steel structures are known for their higher rate of localized corrosion but there is still some controversy about the specific mechanics causing this phenomenon. This paper overviews the weld corrosion literature that has considered the possible mechanisms involved and the associated material and environmental conditions. Experimental observations are then presented on the metallographic analysis of five separate grades of low-carbon steel. The possibility is examined whether there is a likelihood of greater pit depths being associated with the weld and heat affected zones and whether they can be considered the result of the presence and influence of macro-galvanic cells within the steel matrix. Also, the possibility of localized corrosion being the result of thermal microstructural gradients produced during the welding process is discussed.
- Identifier
- http://hdl.handle.net/1959.13/1315146
- Identifier
- uon:22901
- Identifier
- ISBN:9781510822573
- Language
- eng
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