Slurry erosive wear behaviour of plasma-sprayed flyash–Al₂O₃ coatings

Abstract

The present investigation focuses on the study of erosive slurry wear behaviour of plasmasprayed flyash-Al 2 O 3 composite coatings on the substrate of Al6061 alloy in slurry with 3.5% NaCl solution. The influence of various process parameters, such as different slurry concentration (10-30%), varying rotational speed (500-1500 rev min −1 ) and varied impinging particle sizes (210-425 µm), was compared by conventional weight loss method and Taguchi's L 27 experimental design method. It was observed that the composite coatings on Al6061 alloy showed a highest resistance to erosion. The significance of the parameters was determined by using analysis of variance technique and it was found that the factors slurry concentration and slurry speed had great influence on erosive slurry wear of substrate with and without plasma spray coatings. Regression analysis was used to develop mathematical model to predict the slurry erosive wear. Predicted values are in good agreement with experimental values.

[Retracted] Electrochemical Studies of WC‐Flyash HVOF Coating Interface on SA209‐T1 Steel under 3.5 NaCl Solution

“…e oxide scale mainly consisted of Fe 2 O 3 has been indicated by WC-flyash-coated steed EPMA map. Fe has been diffused from substrate into the coating for all [16,17].…”

Improvement in Slurry Erosion and Corrosion Resistance of Plasma-Sprayed Fly Ash Coatings for Marine Applications

“…29,30 Some researchers have used fly ash with additives as a feedstock material for plasma spray coating. Naveena et al 31 investigated the individual effect of slurry erosion process parameters on erosive wear behavior of plasma-sprayed FA−50% alumina coatings on Al6061 substrate. The coated samples showed an improvement in slurry erosive resistance and slurry rotational speed, and slurry concentrations were more influential than the slurry particle size.…”

“…Further, Kılıçay’s group used the plasma transferred arc (PTA) method to enhance the microstructural properties and wear resistance of plasma-sprayed aluminum oxide, chromium oxide, WC-Co, and Cr 3 C 2 –NiCr powders onto a 90MnCrV8 steel surface. , Some researchers have used fly ash with additives as a feedstock material for plasma spray coating. Naveena et al investigated the individual effect of slurry erosion process parameters on erosive wear behavior of plasma-sprayed FA–50% alumina coatings on Al6061 substrate. The coated samples showed an improvement in slurry erosive resistance and slurry rotational speed, and slurry concentrations were more influential than the slurry particle size.…”

Erosion-corrosion Behavior of Aluminum 7075 based SiC Reinforced Nanocomposites

“…Those observations sincerely suggest that the addition of SiC nanoparticles enables in enhancing the erosion resistance of Al7075 but with the increasing slurry rotation the weight reduction for those nanocomposites additionally has a tendency to increase. It's far well known fact that the erosive wear takes place because of relative motion among the surface of alloy/nanocomposite and impinging particles [14][15]. Fig.10 shows the erosion-corrosion conduct of Al7075 and its nanocomposites with varying test duration for both the processing conditions.…”