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

摘要

The impact of a high molecule organic compound containing amine fragment (HMoA) on thecorrosion and electrochemical behaviors of carbon steel (CSA516), ferritic (SS410) and austenitic(SS304L) stainless steels was studied in the environment of the LAO (linear -olefin) plant. Corrosiono tests were carried out at 270 C and 29 bar in an autoclave at different exposure time intervals (up to30 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 themorphologies of the corroded and inhibited surfaces. Efficiency and kinetics of electrode processes inthe 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 thatthe inhibition performance of the tested compound recorded inhibition efficiencies of 30%, 66% and95% for CSA516, SS410, and SS304L, respectively. Based on the obtained experimental findings andsurface examinations and analysis, the mechanism of the inhibition process is discussed.