Inhibition action of n-decylamine on the dissolution of low carbon steel in sulphuric acid

摘要

The inhibition efficiency of n-decylamine on the corrosion of low carbon steel in 1 N sulphuric acid in different temperatures has been investigated potentio-kinetically. Various parameters such as corrosion potential, corrosion current, polarisation resistance, transfer coefficient, standard free energy of adsorption, enthalpy and entropy as well as the activation energy have been calculated. It has been found that n-decylamine is adsorbed according to Langmuir isotherm. Mechanism of low carbon steel dissolution and the hydrogen evolution reaction do not change in the presence of the inhibitor used.