Oxidation behavior of aluminide coatings on carbon steel with and without electrodeposited Ni-CeO2 film by low-temperature pack cementation

A CeO2-dispersed aluminide coating was fabricated through aluminizing the electrodeposited Ni-CeO2 nanocomposite film on carbon steel using pack cementation method at 700 degrees C for 4 h. The isothermal and cyclic oxidation behavior of the CeO2-dispersed aluminide coating at 900 degrees C, including the growth of oxide scale and the microstructure of the coatings, have been investigated comparing with the aluminide coating on carbon steel. The results show enhanced oxidation performance of the CeO2-dispersed aluminide coating, which is concerned with not only CeO2 effect on the microstructure and oxidation, but also decreased interdiffusion between the aluminide and the Ni film. The CeO2 benefit effects and interdiffusion are discussed in detail. (C) 2011 Elsevier Ltd. All rights reserved.