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Oxidation Behavior of Stainless Steel with Electroless Ni-Fe-P Coatings

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Abstract:

Ni-Fe-P coatings were deposited on ferritic stainless steel by means of electroless method. The oxidation behavior of the steel with these coatings were investigated at 800°C in air. The mass gain of the steel with Ni-Fe-P coatings deposited from solutions with different mass ratios of FeSO4 to NiSO4 decreased with increasing mass ratio. For the steel with Ni-Fe-P coating deposited in the solution with 0.25 of the mass ratio, the mass gain increased with the increase in oxidation time. While the mass gain of the steel with coatings deposited in solution with 0.5 and 0.75 of the mass ratio, respectively, became stable after 10-h oxidation. Compared with Ni-P, The Ni-Fe-P coatings improved the spallation resistance of the surface oxide scale. The oxide scale formed the bare steel consisted of Cr2O3 with TiO2 and (Mn,Cr)3O4 spinel. However, the oxide scale thermally grown on the steel with Ni-Fe-P coatings was composed of NiO, (Ni,Fe)3O4 spinel and Cr2O3.

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Periodical:

Advanced Materials Research (Volumes 160-162)

Pages:

1276-1279

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.160-162.1276

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Online since:

November 2010

Authors:

Shu Jiang Geng, Qian Wang

Keywords:

Electroless, Ferrtic Stainless Steel, Ni-Fe-P Coating, Oxidation

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© 2011 Trans Tech Publications Ltd. All Rights Reserved

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