EGGSHELL COATED GREY CAST IRON FOR CORROSION APPLICATIONS
DOI:
https://doi.org/10.11113/jt.v79.12258Keywords:
Eggshell, coating, grey cast iron, calcium carbonate, sinteringAbstract
In many years, corrosion has been such issues for carbon steel. Eggshell waste is believed to be a potential coating material for carbon steel in many applications. This paper introducing the use of eggshell waste which contents a source of calcium carbonate as corrosion prevention coating material on the grey cast iron by utilizing electrophoretic deposition (EPD) method. Eggshell consisted of 94-95 % of calcium carbonate in the form of calcite and others. Thus, calcium carbonate precipitation can serve as naturally formed coating on the cast iron pipe and prevent diffusion of oxygen that can direct to corrosion. Besides, this method will also prevent the lengthy and complex corrosion control piping system. In this study, the eggshell has been successfully coated on the grey cast iron substrate with optimum condition of 80 V for 1 minute deposition time at the sintering temperature of 600°C. From the preliminary work, thin and uniform coating thickness were produced at 1 minute deposition time and moderate voltage values of 60 – 80V.
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