Inhibition of metal dusting of alloy 800H by laser surface melting
Voisey, K.T. and Liu, Z. and Stott, F.H. (2006) Inhibition of metal dusting of alloy 800H by laser surface melting. Applied Surface Science, 252 (10). pp. 3658-3666. ISSN 0169-4332
Metal dusting is a catastrophic carburisation phenomenon that occurs at temperatures of 450-850°C in atmospheres of high carbon activity. The resistance of alloys to corrosion, including metal dusting, relies on the formation of a dense, adherent oxide layer that separates the alloy from the corrosive environment. For such an oxide layer to be protective, it must achieve full surface coverage, be crack-free and be established before significant material degradation has occurred. Formation of a protective oxide scale can be enhanced by increasing the population of rapid diffusion paths for the protective elements (e.g. Cr and Al) to reach the alloy surface.
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