Synthesis, experimental and theoretical studies of triazine derivatives with surface activity as effective corrosion inhibitors for medium carbon steel in acid medium

Two triazine derivatives were synthesized and characterized by HR-MS and 1H NMR spectroscopy. Melamine (S1), S2 and S3 were examined as corrosion inhibitors for medium carbon steel in 1 M HCl solution using electrochemical measurement, weight loss and surface analysis. The theoretical studies combining with experimental results revealed a same inhibition order S3 > S2 > S1. This study proved that the synergistic effect of surface active functional groups and corrosion inhibition functional groups on corrosion inhibition performance and sufficiently comprehensive and detailed to explain the effects and mechanism of triazine inhibitors.