BENDINELLI, E. V. ; AOKI, I. V. ; COTTING, F. ; BARCIA, Oswaldo Esteves ; Margarit-Mattos, I.C.P. .
Resumo: This work aimed to characterize the anticorrosive performance of HDLs with and without encapsulated imidazole. Also, the role of HDL is examined. Two HDLs were studied. One was calcined and reconstructed in imidazole solution (HTC-Im). The other was calcined, reconstructed with terephthalate and dopped with imidazole (HTCTe-Im). Hexagonal lamellar morphology was observed with transmission electron microscopy. DRX showed more crystalline and organized structure for HTC-Im, which also presents slower imidazole releasing kinetics, when compared to HTCTe-Im, as monitored by UV-Vis spectroscopy. Mass loss tests clearly showed that Mg-Al-HDL is more than an inert container. It has sinergic anticorrosive activity with the interlamallae imidazole. The chloride-inhibitor anion exchange can be considered as an important aspect for corrosion control, but there is also contribution of aluminum and/or magnesium specimens from HDL structure itself.
