ISSN:
1573-4889
Keywords:
chromia formers
;
low partial pressure of oxygen
Source:
Springer Online Journal Archives 1860-2000
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Abstract This study assessed the oxidation behavior of three commercial alloys in airand low partial pressures of oxygen roman (PO 2. The kinetics ofoxidation in air were compared with values obtained in an atmosphere of lowroman PO 2. The low partial pressure of oxygen was of the order of10−16 atm at 930°C and was generated using an H2/4% H2Omixture. The nature of the corrosion products, structure, morphology, andcomposition were assessed and characterized using scanning electronmicroscopy (SEM), X-ray mapping, and scanning Auger microscopy (SAM). Theresults were compared with those obtained for 99.99% pure chromium. Parabolickinetics were exhibited by all of the alloys, with the overall kp valuesbeing of the order constant for chromia-forming alloys. Large variations inthe morphologies of the oxide scales were observed as a result of oxidationin the high and low roman PO 2 environments.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1023/A:1004658814608
Permalink
