The Influence of Plastic Strain on the Corrosive Properties of Plasma Sprayed Intermetallic NiAl and Ni3Al Coatings

Robert Starosta

doi:10.4028/www.scientific.net/SSP.165.177

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The Influence of Plastic Strain on the Corrosive Properties of Plasma Sprayed Intermetallic NiAl and Ni₃Al Coatings

Abstract:

The paper presents the preliminary research results that were aimed at working out a technology of the surface roughness reduction by means of plastic working methods. The intermetallic phase NiAl and Ni3Al coatings that were plasma sprayed on a flat bar made of non-alloy steel (C45) were chosen for the research. The coatings underwent plastic working with the use of press. Three specific loads were used: 500, 800, 1100 MPa. The treated coatings exhibited 70% lower surface roughness as compared to thermally sprayed layers. However, high values of relative strain of coatings ( = 0.21 – 0.62) were obtained. Plastic working resulted in the decrease of corrosive potential values and increase of corrosive current density.

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Periodical:

Solid State Phenomena (Volume 165)

Pages:

177-182

DOI:

https://doi.org/10.4028/www.scientific.net/SSP.165.177

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Online since:

June 2010

Authors:

Robert Starosta

Keywords:

Corrosion, Intermetallic Phase, Ni₃Al Coating, NiAl, Plasma Thermal Spraying, Plastic Strain

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