Maftah H. Alkathafi* and Alhammali A. Younis
Coating of zinc was applied on stainless steel wire substrate using twin wire arc spray to change the surface properties of the substrate, such adhesion, wettability, and corrosion and wear resistance. In this work, there are three basic experimental activities. Firstly the coating parameter optimization, followed by wire coating and finally the fiber coats properties characterization. The properties of the coated wires have analyzed through metallographic analysis and bending test is a mechanical test was used in this work to study qualitatively the adhesion of the coated layer. The results showed that the optimal parameters to coat Zn-layer on the stainless steel wires are as following:
Voltage: 22 V
Current: 200 A
Air pressure: 2.4 bar
Stand-off distance: 150 mm
Wire clamping pressure: 1 bar
Gun speed: 18000 mm/min
Nozzle diameter: 2.2 mm
Blasting (pressure/distance): 6 bar/100 mm
Linear wire speed: 785.398 mm/min
Average coating thickness was varied between 100 µm and 220 µm.
The Zn-coating layer started to crack for the bending angles less than 120°C.
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