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The rate of carburization of iron in CO-H2 atmospheres: Part I. Effect of temperature and CO and H2-pressures

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Abstract

The rates of carburization of iron strips in CO-He and CO-H2 atmospheres at 1188 and 1273 K have been investigated. The rates in CO-He and the initial rates in CO-H2 mixtures are controlled by a slow chemical reaction on the surface of iron. The rate controlling reaction in CO-He atmospheres is interpreted to be the formation of the activated complex (CO)‡ 2 and the results indicate that CO and carbon are adsorbed on solid iron and affect the rates. The rate of carburization in CO-H2 is significantly faster than in CO-He mixtures and the maximum rate occurs at the equimolar composition. The rate controlling reaction for the CO-H2 reaction is the formation of (H2CO)° and the rate constant is about a factor of five greater than that for carburization in CO alone.

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Authors and Affiliations

  1. United States Steel Research Laboratory, 15146, Monroeville, Pa.

    R. J. Fruehan (Senior Scientist)

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  1. R. J. Fruehan
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Fruehan, R.J. The rate of carburization of iron in CO-H2 atmospheres: Part I. Effect of temperature and CO and H2-pressures. Metall Trans 4, 2123–2127 (1973). https://doi.org/10.1007/BF02643276

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  • DOI: https://doi.org/10.1007/BF02643276

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