Effect of Film Forming Amine on Flow Accelerated Corrosion of Carbon Steel in Boiler Feed Water of Power Plants

Abstract

Flow accelerated corrosion（FAC） tests on carbon steel in boiler feed water of power plants were carried out. The FAC of carbon steel was remarkably inhibited by adding film forming amines of Dodecylamine （DDA） and Octadecylamine （ODA） into the boiler water. Furthermore, the FAC inhibition mechanism of the film forming amines was investigated by polarization tests and zeta potential measurements. It was suggested that the film forming amines adsorbed on the steel surface and on the oxide film formed, inhibiting the corrosion reactions on the steel and protecting the oxide film, thereby the FAC was inhibited.