Corrosion Behaviour Of Mild Steel Coated With Epoxy-PANi-Phosphorus Thin Film In 3.5 WT Percent NaCl Solution

Rosdie, Mohd Said (2019) Corrosion Behaviour Of Mild Steel Coated With Epoxy-PANi-Phosphorus Thin Film In 3.5 WT Percent NaCl Solution. Project Report. UTeM, Melaka, Malaysia. (Submitted)

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Abstract

The epoxy paint coating is the common paint coating used in industries because of its properties are high thermal and good adhesions but its permeable to aggressive agent caused the corrosion rate increase. Addition of filler inside the epoxy paint coating system used to improve the corrosion protection of the coating system. Thus, this study was conducted to investigate the corrosion behaviour of the mild steel coated with epoxy Polyaniline-Phosphorus nanoparticles. The preparation of the material will involve with epoxy resin, harderner, PANi and P particles as the filler in coating system. The epoxy-PANi-P nanoparticles paint coating was applied on the mild steel susbstrate by using hand layout method and let it cure for two days in room temperature. PANi-P nanoparticles was added into the epoxy paint coating system with different formulate of PANi-P content started with 0%, 2%, 4%, 6%, 8% and 10% weight percent of PANi-P. The corrosion behaviour of these epoxy-PANi-P was determined using Open Circuit Voltage (OCV) test. The mild steel sample coated addition of 0% and 2% weight percent of PANi-P particles able to provide better protection as a barrier against the corrosion activities while coating sample with addition of 4%, 6%, 8% and 10% weight percent of PANi-P particles was not able to provide the proper corrosion barrier. Sample with addition of 10% weight percent of PANi-P particles shows the worst corrosion activities and had being proven by both macroscopic and microscopic observation after all sample were immersed in 3.5% weight percent of sodium chloride solution for 30 days. OCV test also showed that the addition of 10% of PANi-P particles into the epoxy coating system were not able to provide better corrosion barrier and causes the mild steel substrate to corrode.

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