STUDY OF CORROSION AND TRIBOLOGICAL PROPERTIES OF ZINC-TUNGSTEN ALLOY PROCESSED BY CRYOGENIC CONDITIONS

Abstract

It is estimated that Zinc-3 % Tungsten alloy exposed to multiaxial forging (MAF) at room temperature has wear and corrosion properties. Using a pin-on-disk dry sliding wear setup, we were able to investigate the effects of 15 and 25 N loads on wear over a range of sliding distances and speeds (600-3600 metres) By increasing the samples’ hardness through MAF cycles, frictional losses and wear mass losses are reduced. Surface layer wear resistance reduces with raising load and sliding velocity. Deformation zones, wear tracks, microcracks and micro-plowing grooves can all be seen on the worn surface. As MAF passes increase due   to grain refinement, the current density (Icorr) is clearly demonstrated by potentiodynamic polarisation testing. According to electrochemical impedance measurements, the capacitive arc’s width rise as a result of the reduced corrosion rate. Higher MAF passes demonstrated improved corrosion resistance.