Abstract
Erosion-corrosion is a form of material degradation that occurs in components that handle slurries in a wide range of engineering equipment. Whilst many erosion-corrosion situations (e.g. marine) involve fluids of around neutral pH, the environment is acidic in other circumstances. This paper describes the first phase of an investigation of erosion-corrosion in solid/liquid and liquid conditions where the water is acidic. In the present study, a medium carbon steel (UNS G10400) and superduplex stainless steel (UNS S32760) were investigated at pH = 6.5 and 4.0, using a submerged jet technique. In addition to the determination of the mass losses and in-situ corrosion rate monitoring, further information was obtained from detailed post-test examination and analysis. This assessment has illustrated substantial differences between the behaviour of two different steels in acidic conditions. For instance, the reduction of pH from 6.5 to 4.0 produced minor changes in mass loss, and in situ corrosion rates, on superduplex stainless steel, whereas substantial increases of material deterioration rates were observed on the carbon steel in acidic conditions. The study has provided useful information that enables fundamental erosion-corrosion mechanisms to be identified.
| Original language | English |
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| Number of pages | 15 |
| Publication status | Published - 15 Nov 2015 |
| Event | 2015 Department of Defense – Allied Nations Technical Corrosion Conference - Pennsylvania, Pittsburgh, United States Duration: 15 Nov 2015 → 19 Nov 2015 |
Conference
| Conference | 2015 Department of Defense – Allied Nations Technical Corrosion Conference |
|---|---|
| Country/Territory | United States |
| City | Pittsburgh |
| Period | 15/11/15 → 19/11/15 |
Keywords
- acidic conditions
- medium carbon steel (UNS G10400)
- superduplex stainless steel (UNS S32760)
- erosion-corrosion behavior