Erosive and corrosive wear performance and characterization studies of plasma‐sprayed WC/Cr ₃ C ₂ coating on SS316

Abstract

Plasma spray coating with ceramic carbide is a promising approach for improving the surface quality of the materials. In this work, the effectiveness of tungsten carbide (WC), chromium carbide (Cr3C2), and the composite coating of the two powders in the weight ratio of 50:50 were investigated. In the erosion test, aluminum oxide (Al2O3) particles were combined with a high‐speed air‐jet and impinged at 90° on the top surface of the material. Electrochemical polarization and electrochemical impedance spectroscopy studies were conducted with a 3.5 wt.% of sodium chloride (NaCl) solution as the electrolyte. Using a scanning electron microscope, the surface morphology of powders and coatings, as well as the mechanisms of erosion and corrosion, were studied. Energy‐dispersive X‐ray analysis and X‐ray diffractometry were used to reveal the composition and elemental distribution of the feedstock powders and coatings. Because of the presence of hard phases, the composite coating shows the highest average microhardness of 1350.2 HV. The composite coating exhibits improved erosive wear resistance with an increase in erodent exposure time. The Cr3C2 coating has a reduced corrosion current density of 1.404 × 10−5 mA/cm2 and a higher charge transfer resistance of 2086.75 Ω cm2 due to passivation.

Surface morphology studies and corrosion behaviour of plasma sprayed Cr3C2/8YSZ composite coating on SS316

“…Five readings were collected from the coating's top surface at regular intervals, and three readings were recorded in the bond-coated region. Additional five measurements were taken in the substrate at regular intervals with a load of 100 g for a holding time of 10 s [26].…”

“…The corrosion current density of Cr 3 C 2 was lower when compared to WC + Cr 3 C 2 composite coatings. The corrosion resistance of Cr 3 C 2 was enhanced due to the formation of the strong passive layer in coatings [20][21][22][23][24][25][26][27][28]. Xie et al [29] investigated the corrosion behaviour and microstructural analysis of NiCr-Cr 3 C 2 coatings over steel.…”

Strategically Designed Pd-Induced Changes in Alkaline Hydrogen Evolution Reaction and Oxygen Evolution Reaction Performances of Electrochemical Water Oxidation by the Galvanically Synthesized MoO2/MoO3 Composite Thin Film

“…4 Generally, there are three types of industrial H 2 production, which are as follows: (1) coal gasification, (2) steam reformation of methane, and (3) water splitting. 4 To date, more than 95% of industrial H 2 production is carried out through the coal gasification process and steam methane reforming, which indicate that H 2 production is still dependent on fossil fuels. 5 In addition, a large amount of CO 2 is released along with H 2 during high-temperature coal gasification and steam methane reforming.…”

“…The ever-increasing consumption of fossil fuels and the concomitant environmental and climate changes have encouraged the development and usage of renewable, green, and clean energy resources. , Therefore, obtaining renewable, high-quality hydrogen (H 2 ) through low-cost techniques and with carbon neutrality has been considered a promising next-generation energy resource. , Unlike natural gas, coal, and oil, H 2 is not naturally abundant on our planet. Thus, the low cost and effective green production of H 2 are most important for its large-scale utilization . Generally, there are three types of industrial H 2 production, which are as follows: (1) coal gasification, (2) steam reformation of methane, and (3) water splitting .…”

“…Thus, the low cost and effective green production of H 2 are most important for its large-scale utilization . Generally, there are three types of industrial H 2 production, which are as follows: (1) coal gasification, (2) steam reformation of methane, and (3) water splitting . To date, more than 95% of industrial H 2 production is carried out through the coal gasification process and steam methane reforming, which indicate that H 2 production is still dependent on fossil fuels .…”