Parameters to estimate the metal dusting attack in different gases

C. Schlereth, K. Hack, M.C. Galetz

Corrosion Science 206 (2022), 110483, DOI: 10.1016/j.corsci.2022.110483


Reprinted from Corrosion Science, Copyright (2022), with permission from Elsevier.

The relation between the experimentally observed metal dusting attack and parameters calculated from the test conditions is analysed. Commercial alloys were exposed for nearly 1000 h at elevated pressure in four gas mixtures. The gases had a constant carbon activity regarding the synthesis gas and the Boudouard reaction. However, these parameters did not correlate properly with the observed aggressivity. Alternative descriptions by the CO/H2 ratio, the carbon activity after water gas shift reaction and at metastable equilibrium are discussed. The results show that the whole set of reactions between gas and solid needs to be considered to describe the complex system.

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