Oxidation Behavior of HVAF-Sprayed NiCoCrAlY Coating in H-2-H2O Environment
Artikel i vetenskaplig tidskrift, 2016

Isothermal oxidation behavior of an HVAF-sprayed NiCoCrAlY coating on AISI 304L was studied in an Ar-10 %H-2-20 %H2O environment at 600 A degrees C. Techniques such as BIB/SEM, EDS, and XRD were used to comprehensively characterize the coating and the coating/substrate interface to investigate the oxidation mechanisms. Results were also compared with those obtained from an uncoated AISI 304L substrate. The alumina-forming NiCoCrAlY coating was found to exhibit superior oxidation behavior due to the formation of a slow-growing and protective Al2O3 scale, while the chromia-forming bare 304L substrate lost its protective capability due to the formation of a duplex [Fe3O4 on (Fe,Cr)(3)O-4 spinel oxide] corrosion product layer.

Oxidation

Water vapor

MCrAlY coating

Oxygen partial pressure

HVAF

Författare

E. Sadeghimeresht

Högskolan Väst

Hamed Hoseini Hooshyar

Chalmers, Kemi och kemiteknik, Energi och material, Oorganisk miljökemi

N. Markocsan

Högskolan Väst

S. Joshi

Högskolan Väst

P. Nylen

Högskolan Väst

Oxidation of Metals

0030-770X (ISSN) 1573-4889 (eISSN)

Vol. 86 3-4 299-314

Ämneskategorier

Kemi

DOI

10.1007/s11085-016-9637-9

Mer information

Senast uppdaterat

2018-04-18