Exploring the corrosion inhibition of magnesium by coatings: Formulated with nano CeO2 and ZnO particles

Abstract

The objective of the work is to identify the anticorrosive property synthesized Nano ZnO rods and CeO2 particles. Both ZnO and CeO2 have good anticorrosion behavior; this materials are tested with and without composition to identify the corrosion inhibition behavior. The result reveals the high protection rate, which was accomplished by the composition. In this research, a detailed investigation of the corrosion inhibition performance of magnesium (Mg) substrate coated nanoparticles like cerium dioxide (CeO2), zinc oxide nanorods (ZnO) and CeO2/ZnO composites were studied. Synthesized nanoparticles were characterized by various physio-chemical techniques. Surface morphology of the developed set of specimens was scrutinized through SEM and EDAX, which established a clean surface coating with minimal defects attainment through doctor’s blade method. Electrochemical corrosion behavior of Mg substrates coated with definite proportions of CeO2, ZnO and CeO2/ZnO composites were conceded in 3.5 wt. % NaCl using Tafel polarization and electrochemical impedance spectroscopy. Thus the developed CeO2/ZnO composite coating exhibits icorr of 0.905 (A cm−2) and corrosion rate was 0.81 × 10−5 mpy better corrosion resistance compared to bare Mg or CeO2 or ZnO coatings.