Optimization of Eggshell-Derived CaCO3 Nanoparticles in Zinc-Rich Epoxy Coating for ASTM A283

Le résumé fourni par la source

Corrosion of low carbon steel is a common problem in various industrial applications, requiring effective protection methods. This study aims to determine the best composition and analyze the effect of adding calcium carbonate nanoparticles (CaCO3 NPs) from eggshell waste as filler in a zinc-rich epoxy (ZRE) coating system on the mechanical properties and corrosion resistance of ASTM A283 low carbon steel. CaCO3 NPs were characterized using X-ray diffraction (XRD) and particle size analyzer (PSA). Coating was carried out with various concentrations of CaCO3 NPs at 0, 3, 4, 5, and 6 wt.%. The coating method used is the brush method using a flat brush. The coating was evaluated using Tafel polarization and Pull-off test. The test results showed that the addition of CaCO3 NPs was able to reduce the corrosion rate to the lowest value obtained at 6 wt.% CaCO3 NPs with a value of 0.031 mm/y. The Pull-off test results showed that increasing the concentration of CaCO3 NPs tended to reduce the adhesion strength. This paper discusses the determination of the optimum composition of ZRE- CaCO3 NPs coating that can produce the best mechanical properties and corrosion resistance on ASTM A283 low carbon.

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