Abstract
The green corrosion inhibitor is used in epoxy coating system by extraction of turmeric in dimethyl formamide (DMF). The major component extracted is curcumin. Three concentrations have been studied for anticorrosive performance i.e., X, 2X and 4X. Among this X based concentration showed the best performance. Magnesium hydroxide Mg(OH)2 has been treated with 3-glycidoxypropyltrimethoxysilane (GPTMS). It was added into coating formulation at three concentrations namely 5%, 7% and 10% (w/w). The best anticorrosive performance has been observed for 5% concentration. As the concentration increases the anticorrosive performance decreases but flame retardancy increases. The 7% Mg(OH)2 concentration has been combine studied with turmeric X concentration. It is observed that combination of extract with Mg(OH)2 gives good anticorrosive performance as well as flame retardant properties. The anticorrosive performance is evaluated by salt spray and electrochemical impedance spectroscopy (EIS) and flame retardancy is evaluated by Limiting oxygen index (LOI) and UL-94 study.
Highlights
The green corrosion inhibitor is used in epoxy coating system by extraction of turmeric in dimethyl formamide (DMF)
In plain epoxy coating the sample after burning lost its structural stability and break down into pieces whereas in case of Mg(OH)2 sample and Mg(OH)2curcumin sample after burning does not loses its structural stability and maintain its structure after burning this is the indication that flame retardant properties of the coating increases with addition of Mg(OH)2 and Mg(OH)2-turmeric combination
Epoxy-amine coating has been modified with turmeric extract and GPTMS modified Mg(OH)2
Summary
Turmeric powder is obtained from local market with brand name ‘Everest Turmeric Powder’. Mg(OH), DMF, Toluene obtained from S.D. Fine India Pvt. GPTMS is obtained from alfa aesar. Epoxy resin is obtained from Grand Polycoat Pvt. Ltd. Used as base resin and amine is used as hardener obtained from Dow Company Pvt. Ltd.
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