Effect of Incorporating a Biodegradable Ecofriendly Additive in Pursuit of Improved Anti-Corrosion, Microstructure and Mechanical Properties of a Zn-based TiO2/TiB2 Coating by DAECD Technique

摘要

The incorporation of composite and eco-friendly particles or fluids to develop newudengineering materials has recently changed the coating world. In this study, a Zn-TiO2-udTiB2 ternary alloywas produced from a sulphate bath on a mild steel substrate. Solanumudtuberosum (ST) was later introduced to the bath to evaluate the effect of the organicudadditive on the ternary alloy. The study was conducted under constant plating time andudcurrent density. The fabricated matrix was systematically investigated using scanningudelectron microscope (SEM) coupled with an energy dispersive spectrometer (EDS) forudstructural properties. The micro hardness and anti-corrosion properties of the depositsudwere studied using, respectively, a diamond base micro hardness tester andudpotentiodynamic polarization method. The anti-wear properties and thermal stability ofudthe electrodeposited alloy were studied using a MTR-300 abrasive tester and anudisothermal furnace at 250 ºC. From the observed result, the coatings presented goodudstability, especially for Zn-TiO2-TiB2-ST, as compared to the Zn-TiO2-TiB2 coating.udThe addition of ST improved the hardness properties of the matrix from 182.4 to197.2udHV, and the corrosion rate from 0.9805 to 0.7711 mm/yr. This work established that codepositionudof mild steel with TiO2/TiB2/ST is promising in anti-wear and corrosionudresistance properties.