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Abstract This paper reviews some factors affecting the coking behaviors of metal materials,which are the temperature of the carbon-containing atmosphere, the kinds and the surface state of metal materials, and the kinds and ratio and flowing velocit of the gases forming the carbon-containing atmosphere,and then introduces the initiating mechanism of catalytic coking and its applications. Taking the Fe-Cr-Ni alloy as an example, the paper also respectively introduces two kinds of carburizing behaviors, i.e. inner carburizing and metal dusting , and then reviews the effects of temperature, carbon-containing atmosphere, as well as crystal structure and element constitution of the alloy on the inner carburizing and metal dusting . Finally the relations between coking and carburizing are analyzed, and three kinds of protective methods including adding coking inhibitor,adjusting structure and element constitution of metal materials, and preparing coating are introduced.
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Received: 25 May 2002
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O621.25+4.2
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O643.38
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