Effect of WC addition on the corrosion behavior of powder metallurgy Cu-10SiC in a 3.5 wt% NaCl solution. (2021)

• Record Type: Journal Article
• Authors: Satishkumar, P.; Saravana Murthi, C.; Meenakshi, R.; Ramesh, G.
• Is Part Of: Materials today. Volume 37(2021)Supplement Part 2
• Page Start: 3543
• Page End: 3549
• Publication Date: 2021
• Subjects: Cu composites -- Powder metallurgy -- WC -- SEM -- Corrosion -- Porosity; Materials science -- Congresses -- Periodicals; 620.1
• DOI: 10.1016/j.matpr.2020.09.429
• Languages: English
• ISSNs: 2214-7853

Abstract

Abstract: An experiment was analyzed to examine the corrosion activity of Cu-10SiC alloy reinforced in a 3.5 wt% NaCl aqueous solution with different volume fractions of Tungsten carbide (WC) particulates. The composites were prepared by means of powder metallurgy (PM). It examined the corrosion of unreinforced and strengthened alloy. Electrochemical measurements (potentiostatic testing) exhibited that the thermal conductivity of the composites decreased with an increase in WC weight percentages due to the unstable microgalvanic synchronizing between the reinforcing particles and the Cu10SiC matrix and a reduced possibility of interfacial phase formation. The ANOVA result revealed that deviations in the corrosion resistance of the composites are statistically relevant when the weight percentages of WC particles change. The characteristic impedance between conductivity and free corrosion points increased with an increase in WC volume fraction, as WC cathodically prevents the polymer composites by ritual reduction of the crevice areas against reinforcement particles. Scanning Electron Microscope (SEM) images of the surfaces of the sample pre and post inspection are in conformance with the electrochemical results. In addition, some concessionary corrosion assaults have been identified at WC / matrix integrations and in WC nodes during the composite corrosion process. Therefore, the porosity content of the composite materials was around the same level.