Diamines as Corrosion Inhibitors for Aluminium Alloy in Organic Acid

Aluminium and its alloys are light weight and corrosion resistant material and vitally preferred as materials of construction in many chemical and engineering fields. Nitrogen-containing organic compounds, such as amines and diamine derivatives on the corrosion for many metals in acidic solutions offer good protection of metallic materials. In the present investigation of corrosion inhibition of aluminium alloys of grade 1060, 1100 and 3003 in trichloroacetic acid are analysed by using conductivity and potentiostatic polarization in different inhibitors of diamine such as ethyl amino ethylamine, di-methyl amino ethylamine, 1:3 di-amino propane, tetra methyl ethylene diamine. Cathodic and anodic polarization curves are showing di-amines are acting as mixed inhibitors in the case of alloy of 3003 grade.