Corrosion Inhibition of Aluminium in HCl by Amine Modified Epoxy Resin

Abstract EN

N-Butyl amine has been grafted unto Dow epoxy resin.

The product was evaluated as an acid inhibitor by gravimetric techniques.

The reduction in corrosion of aluminium in 1 M HCl solution was 92% at 30∘C and 83% at 60∘C with an inhibitor concentration of 100 ppm.

The corrosion rate at this concentration was 3.0×10−2 and 1.5×10−1 mm/yr at 30∘ and 60∘C.

For the specimens in HCl without inhibitor at 10-hour immersion period, the corrosion rate was 3.8×10−1 and 8.6×10−1 mm/yr, respectively, at 30∘ and 60∘C.

Data obtained correlate with Langmuir isotherm.