Case study: Impact of Amine Containing Organic Compound on the Corrosion and Electrochemical Behaviors of Constructive Alloys in Linear Alpha Olefin Environment

The impact of a high molecule organic compound containing amine fragment (HMoA) on the corrosion and electrochemical behaviors of carbon steel (CSA516), ferritic (SS410) and austenitic (SS304L) stainless steels was studied in the environment of the LAO (linear α-olefin) plant. Corrosion tests were carried out at 270 o C and 29 bar in an autoclave at different exposure time intervals (up to 30 days). Corrosion rates were determined using mass losses of the samples with and without HMoA. Optical microscopy (OM) and scanning electron microscopy (SEM) were employed to assess the morphologies of the corroded and inhibited surfaces. Efficiency and kinetics of electrode processes in the presence of HMoA were investigated by means of polarization and impedance measurements. Results of these experimental data are widely presented and discussed in this paper. It was found that the inhibition performance of the tested compound recorded inhibition efficiencies of 30%, 66 % and 95 % for CSA516, SS410, and SS304L, respectively. Based on the obtained experimental findings an