Electrochemical investigation of erosion-corrosion using a slurry pot erosion tester
Rajahram, S.S., Harvey, T.J. and Wood, R J K (2011) Electrochemical investigation of erosion-corrosion using a slurry pot erosion tester. Tribology International, 44, (3), 232-240. (doi:10.1016/j.triboint.2010.10.008).
Download
Full text not available from this repository.
Description/Abstract
The aim of this paper is to use a modified slurry pot erosion tester to perform in-situ electrochemical measurements during solid particle impingement to investigate the effects of velocity, sand size and sand concentration on a passive metal (UNS S31603). Samples are subjected to a set of erosion-corrosion experiments. The electrochemical response of UNS S31603 to the test parameters are plotted and compared to develop an understanding of the erosion-corrosion process. The current trend with variation of test parameters has been explained by an erosion enhanced corrosion synergistic effect. The current transients associated with depassivation and repassivation during solid particle impingement are observed through electrochemical noise measurements. It was observed that the increase in velocity and sand concentration increased the current levels during erosion-corrosion. However, the increase in sand size had a more complex response. Single particle impact experiments conducted revealed that the peak corrosion current and the repassivation time increased with increasing velocity. A linear trend was seen between the peak current and kinetic energy. A second order exponential decay was fitted to the repassivation kinetics of the single particle impact. SEM has been used to develop a mechanistic understanding of erosion-corrosion. The surface scars reveal that the depth of the craters and the length of the lips increase with increasing velocity. Micro-cracks also appear on these lips, believed to be due to corrosive action attacking the roots of these lips.
| Item Type: | Article |
|---|---|
| Additional Information: | nCATS, National Centre for Advanced Tribology at Southampton, School of Engineering Sciences, University of Southampton, Highfield, Southampton, SO17 1BJ, UK |
| ISSNs: | 0301-679X (print) 1879-2464 (electronic) |
| Keywords: | slurry pot erosion tester, erosion-corrosion, electrochemical noise |
| Subjects: | Q Science > QC Physics T Technology > TA Engineering (General). Civil engineering (General) |
| Divisions: | University Structure - Pre August 2011 > School of Engineering Sciences |
| Item ID: | 166275 |
| Date Deposited: | 27 Oct 2010 08:01 |
| Last Modified: | 01 Jun 2011 03:17 |
| Contributors: | Rajahram, S.S. (Author) Harvey, T.J. (Author) Wood, R J K (Author) |
| Date: | March 2011 |
| Additional Information: | nCATS, National Centre for Advanced Tribology at Southampton, School of Engineering Sciences, University of Southampton, Highfield, Southampton, SO17 1BJ, UK |
| Status: | Published |
| URI: | http://eprints.soton.ac.uk/id/eprint/166275 |
Actions (login required)
 |
View Item |
