Corrosion Resistance of a Sand Particle-Modified Enamel Coating Applied to Smooth Steel Bars
AbstractThe protective performance of a sand particle-modified enamel coating on reinforcing steel bars was evaluated in 3.5 wt% NaCl solution by electrochemical impedance spectroscopy (EIS). Seven percentages of sand particles by weight were investigated: 0%, 5%, 10%, 20%, 30%, 50% and 70%. The phase composition of the enamel coating and sand particles were determined with the X-ray diffraction (XRD) technique. The surface and cross-sectional morphologies of the sand particle-modified enamel coating were characterized using scanning electron microscopy (SEM). XRD tests revealed three phases of sand particles: SiO2, CaCO3 and MgCO3. SEM images demonstrated that the enamel coating wetted well with the sand particles. However, a weak enamel coating zone was formed around the sand particles due to concentrated air bubbles, leading to micro-cracks as hydrogen gas pressure builds up and exceeds the tensile strength of the weak zone. As a result, the addition of sand particles into the enamel coating reduced both the coating and corrosion resistances. View Full-Text
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Tang, F.; Chen, G.; Brow, R.K.; Koenigstein, M.L. Corrosion Resistance of a Sand Particle-Modified Enamel Coating Applied to Smooth Steel Bars. Materials 2014, 7, 6632-6645.
Tang F, Chen G, Brow RK, Koenigstein ML. Corrosion Resistance of a Sand Particle-Modified Enamel Coating Applied to Smooth Steel Bars. Materials. 2014; 7(9):6632-6645.Chicago/Turabian Style
Tang, Fujian; Chen, Genda; Brow, Richard K.; Koenigstein, Michael L. 2014. "Corrosion Resistance of a Sand Particle-Modified Enamel Coating Applied to Smooth Steel Bars." Materials 7, no. 9: 6632-6645.