Original Paper

Oxidation of Metals

, Volume 69, Issue 3, pp 233-247

First online:

Effect of Al on High-Temperature Oxidation of Cr–W Alloys

  • Ö. N. DoğanAffiliated withDOE National Energy Technology Laboratory Email author 

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Abstract

The effect of Al on the high temperature oxidation behavior of Cr–10 wt.%W alloy was investigated using a cyclical oxidation test at 1,000 °C in dry air. First, Al was added into the Cr–W alloy as an alloying element up to 8 weight percent. Although alloying with Al reduced the spalling, it did not eliminate it. Secondly, Al was applied to the surface using an aluminizing process. Forming an Al–Cr layer on the Cr–W alloy reduced oxidation rate significantly and eliminated spalling completely.

Keywords

Chromium–tungsten alloys High-temperature oxidation Aluminizing