Microencapsulated corrosion inhibitors for controlled release in simulated concrete pore solutions

Colophony microcapsules synthesized by water in oil in water double emulsion containing NaNO2 corrosion inhibitors were investigated for controlled release in simulated concrete pore solutions. With high encapsulation efficiency of 83% measured by induced coupled plasma optical emission spectroscopy, the microcapsules were introduced to solutions of deionized water (pH 6.8), carbonate bicarbonate buffer solution (pH 9.1), and simulated concrete...