The high vacuum behavior of chromium at temperatures between 600° and 1015°C was studied. Using decarburized specimens, chromium acts as a getter to oxygen, while above 825°C chromium vaporizes at an appreciable rate. The vapor pressure of chromium was determined between 885° and 1015°C and a value of was found for . Oxide and nitride films have no appreciable effect on the vapor pressure curve in this temperature and thickness range. The reaction of carbon with the surface oxide occurs at temperatures of 800°C and higher with the carbon being removed as carbon monoxide.
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Gulbransen et al. (1952) studied this question.
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