The present paper aims to compare the corrosion resistance of the electroless Cu-P-SiC with Cu-P composite coating on carbon steel in 1 M HCl solution by the weight loss, potentiodynamic polarisation and electrochemical impedance spectroscopic (EIS) techniques. The study reveals that, the corrosion current density (I corr ) and the double layer capacitance (C dl ) values decrease, the charge transfer resistance (R ct ) and inhibition of efficiencies (IE %) increase with the incorporation of SiC particles in the Cu-P matrix indicating the improvement in corrosion resistance.
Corrosion of carbon steel in CO2 saturated NaCl solution contains the formation of FeCO3, as a corrosion product. The protective property of the formed FeCO3 scale layer to corrosion in brine solutions containing CO2 was established as the possible cause of the corrosion rate decrease above 60 °C. In this study, formation of nanoscale FeCO3 film as a corrosion product of X52 carbon steel in CO2-Saturated 3% NaCl solution was investigated. Result showed that corrosion rate decreased after precipitation and formation of protective FeCO3 film in high temperature and high bulk solution pH.
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