Abstract
This article presents the results of an examination of the properties of arc-sprayed aluminum on alloyed armor-grade steel. Thermal arc spraying was conducted with a EuTronic Arc Spray 4 wire arc sprayer. Aluminum wire 1.6 mm in diameter was used to produce dense, abrasion- and erosion-resistant coatings approx. 1.0 mm thick with and without nickel/5% aluminum-buffered subcoating. Aluminum coatings were characterized in accordance with ASTM G 65-00 abrasion resistance test, ASTM G 76-95 erosion resistance tests, ASTM C 633-01 adhesion strength, HV0.1 hardness tests and metallographic analyses. Results demonstrate properties of arc-sprayed aluminum and aluminum-nickel material coatings that are especially promising in industrial applications where erosion-, abrasion- and corrosion-resistant coating properties are required.
Highlights
Methods of surface engineering such as thermal spraying have undergone many changes and developments in recent years, thanks in part to advances made in heat-source technology and newly developed coating materials [1,2,3,4,5,6,7,8]
As reported by the American Welding Society, pure aluminum and aluminum alloys are normally usedby in the arc-spray processes, as they are the most outstanding materials in are Society, pure aluminum andcoating aluminum alloys aggressive as marineas environments, under thermal insulation coating conditions, or for in normally usedenvironments in arc-spraysuch processes, they are the most outstanding materials hot surfaces
The of aluminum coating from their conditions, passive filmor for aggressive environments suchadvantages as marine environments, under originate thermal insulation formation ability and, their lower corrosion rate [13,14]
Summary
Methods of surface engineering such as thermal spraying have undergone many changes and developments in recent years, thanks in part to advances made in heat-source technology and newly developed coating materials [1,2,3,4,5,6,7,8]. Around 70% of industrial applications involving thermal spraying are used to produce new machinery parts or devices, which require a high finish and surface finish quality. Aluminum coatings are most commonly used in constructions with corrosivity categories of C4 and higher and at pH 4 to 8, providing significant life improvement over conventional barrier coatings. It can serve for a variety of marine, atmospheric and high-temperature applications [4,5,6,7]
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