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Home  > Raw materials & technologies  > Applications  > Corrosion inhibition of magnesium by coatings

Monday, 26 August 2019
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Raw materials & technologies, Applications

Corrosion inhibition of magnesium by coatings

Thursday, 28 February 2019

The objective of a recently published study is to identify the anticorrosive property synthesised Nano ZnO rods and CeO2 particles.

In the study, zinc oxide nanorods and cerium dioxide with and without composition were tested to investigate the corrosion inhibition. Source: James Steidl – stock.adobe.com.
In the study, zinc oxide nanorods and cerium dioxide with and without composition were tested to investigate the corrosion inhibition. Source: Jame...

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 the 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. Synthesised nanoparticles were characterised by various physio-chemical techniques.

CeO2/ZnO composite coating with better corrosion resistance

Surface morphology of the developed set of specimens was scrutinised 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 polarisation 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.

The study is published in: Progress in Organic Coatings Volume 129, April 2019, Pages 32-42.

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