期刊
CORROSION SCIENCE
卷 82, 期 -, 页码 227-238出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.corsci.2014.01.020
关键词
Superalloys; Molten salts; Polarization; SEM; Weight loss; Hot corrosion
资金
- National Energy Technology Laboratory's Coal Utilization Science program [DE-FE0005717]
Coal ash hot corrosion behavior of Inconel 740 superalloy was studied at 700-800 degrees C in a synthetic coal-fired boiler environment using our high temperature electrochemical sensor. The results of electrochemical noise analysis show good correlations with those from a weight loss test. Characteristic potential noise patterns correspond with the predominant stages in the corrosion process. While, characteristic current noise patterns indicate the extent of the corrosion. The data show that corrosion resistance of the alloy was significantly reduced at 750 degrees C and the highest tendency of TiS formation in the internal sulfidation stage led to accelerated intergranular and intragranular corrosion. (C) 2014 Elsevier Ltd. All rights reserved.
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