The Influence of Plastic Strain on the Corrosive Properties of Plasma Sprayed Intermetallic NiAl and Ni3Al Coatings
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.
Andrejus H. Marcinkevičius and Algirdas V.Valiulis
R. Starosta "The Influence of Plastic Strain on the Corrosive Properties of Plasma Sprayed Intermetallic NiAl and Ni3Al Coatings", Solid State Phenomena, Vol. 165, pp. 177-182, 2010