ABSTRACT The oxidation behaviour of 10%, 30%, and 50% cold rolled and unprocessed 9Cr 1Mo ferritic
steels in air have been studied under isothermal conditions at a temperature of 900°C in a cyclic
manner. Oxidation kinetics was established for all samples on which experiment was conducted
in air at 900°C under cyclic conditions for 50 cycles by thermogravimetric technique. Each cycle
consisted of 1 hour heating at 900°C followed by 20 min of cooling in air. 10% cold rolled sample
followed parabolic rate of oxidation while 30% cold rolled sample showed accelerated rate of
weight gain. X-ray diffraction (XRD) and scanning electron microscopy/energy dispersive X-ray
(SEM/EDAX) techniques were used to characterise the oxidized sample and their scales. 10%
cold rolled steel was found to be more corrosion resistance than other in air oxidation for 50
Cite this paper
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