Structure–Phase State and Properties of HVAF Quasi-Crystalline Al–Cu–Fe Coating Produced from Water-Atomized Powder

High-velocity air fuel (HVAF) spraying is used to produce an Al-Cu-Fe quasi-crystalline (QC) coating from a water-atomized powder on a low-carbon steel (A284Gr.D/SS330).As shown, HVAF method shows a good efficiency in the production of protective coatings with acceptable porosity, needed thickness, sufficiently high mechanical characteristics, and anti-corrosion properties.As shown, HVAF process allows controlling the volume fraction of Al63Cu25Fe12 quasi-crystalline phase in the produced coating.The produced QC coating possesses a high cohesion strength (≅ 565 MPa) and good adhesion to the steel substrate providing avoidance of the coating detachment at bending.As shown, the Al63Cu25Fe12 quasi-crystalline coating has satisfactory resistance and hindered formation of surface corrosion damage in artificial sea water due to the formation of a passivating oxide film based on aluminium oxide.