Abstract: The corrosion inhibition performance through neutratiing corrosive material of five organic amines (Triethylamine, N, N-Dimethylethanolamine, 3-Methoxypropylamine, Morpholine and Ethylenediamine) was investigated by acid-base neutralization titration, gas-liquid equilibrium, weight loss and the electrochemical technology. The neutralized performance order for the amines is Ethylenediamine > Morpholine > 3-Methoxypropylamine > N, N-Dimethylethanolamine > Triethylamine. The dissolved ability trend is Triethylamine < Ethylenediamine < 3-Methoxypropylamine < Morpholine < N,N-Dimethylethanolamine. The corrosion inhibition performance for the amines is Ethylenediamine > N,N-Dimethylethanolamine > Triethylamine> 3-Methoxypropylamine > Morpholine. When the mixture concentration rate of N, N-Dimethylethanolamine and Ethylenediamine is 7:1, the corrosion inhibition rate is 91.78%.

Key words: organic amine, solubility, neutralizing performance, corrosion inhibition