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https://hdl.handle.net/2440/44306
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Type: | Journal article |
Title: | Passivity breakdown of carbon steel in hot potassium carbonate solutions |
Author: | Harjac, S. Atrens, A. Moss, C. Linton, V. |
Citation: | Journal of Materials Science, 2007; 42(24):9940-9946 |
Publisher: | Kluwer Academic Publ |
Issue Date: | 2007 |
ISSN: | 0022-2461 1573-4803 |
Statement of Responsibility: | S. J. Harjac, A. Atrens, C. J. Moss and V. Linton |
Abstract: | This research studied passivity breakdown of carbon steel in conditions typical of hot potassium carbonate (HPC) acid gas processing plants. The pitting potential, evaluated from polarisation curves, indicated resistance to pitting increased with increasing equivalent carbonate concentration. The pitting potential was much more positive than the free corrosion potential for uninhibited concentrated carbonate solutions with pH values of 8.5 to 9.5. Therefore pitting is not an issue in these solutions. However, the carbon steel was susceptible to pitting corrosion in the dilute 1.0% bicarbonate solution of pH 8.0 for chloride concentrations in excess of 0.5 wt%. The critical chloride concentration was considerably above the maximum concentration of 0.1 wt% recorded in a typical HPC plant. Consequently chlorides should not usually be of concern to plant integrity. |
Description: | The original publication can be found at www.springerlink.com |
DOI: | 10.1007/s10853-007-2076-x |
Published version: | http://dx.doi.org/10.1007/s10853-007-2076-x |
Appears in Collections: | Aurora harvest Mechanical Engineering publications |
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