The effect of temperature on steel samples immersed in concrete pore solutions contaminated by chlorides incorporating three inhibitors based on phosphate (Na3PO4, K2HPO4, and Na2PO3F) was studied by gravimetric measurements at several ranges: 298, 308, and 318 K. The results obtained for the use of these three products show that the inhibitory efficacy is lower at 318 K than that detected at 308 and 298 K of temperature. Also, we find that the best inhibitory efficiency at 298 K was detected for Na2PO3F (75.80% at 0.05 mol/l of concentration) followed by K2HPO4 (65.05% at 2.5 10−3 mol/l) and then Na3PO4 (61.48% at 7.5 10−3 mol/l).
Part of the book: Contemporary Topics about Phosphorus in Biology and Materials