- Title
- The influence of soil moisture on the corrosion of mild steel in clays after one year of exposure
- Creator
- Petersen, R. B.; Melchers, R. E.
- Relation
- Corrosion and Prevention 2018. Annual Conference. Annual Conference of the Australasian Corrosion Association: Corrosion & Prevention 2018 Proceedings (Adelaide, SA 11-14 November, 2018)
- Publisher
- Australasian Corrosion Association
- Resource Type
- conference paper
- Date
- 2018
- Description
- For short-term exposures it is known that the relationship between corrosion and soil moisture is a highly non-linear function. This is because of the wetting properties of the metal surface relative to the moisture content of the soil. Tests over 6 months exposure by Gupta & Gupta in 1979 showed that little corrosion (surface wetting) occurs for low moisture contents but that it increases very quickly for just a small further increase in moisture content. The Gupta & Gupta test results relate only to sandy soils and sandy loams. Clay soils are not considered. However, clay backfill is predominant in many Australian water utility networks. A laboratory program was completed at The University of Newcastle to replicate and extend the Gupta & Gupta study for clay soils. It involved determining the corrosivity of the clay soil towards mild steel for various soil moisture contents and compaction levels for exposures ranging from 3 to 12 months. Gupta and Gupta did not consider the effect of timing and of compaction. The latter is particularly important for highly impermeable soils like clays. A previous paper presented the results of samples exposed for 3 months. This paper presents the results of samples exposed for 6 and 12 months.
- Subject
- mild steel; clay soils; corrosion; moisture; mass loss; experimental investigation
- Identifier
- http://hdl.handle.net/1959.13/1405988
- Identifier
- uon:35571
- Identifier
- ISBN:9781510881372
- Language
- eng
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