Electrochemical and Surface Analytical Study on the Role of Poly(butylene-succinate)-l-proline during Corrosion of Mild Steel in 1 M HCl

Abstract

The synthesis and corrosion inhibition performance of poly(butylene-succinate)-L-proline (PBSLP) prepared by solution polymerization are reported. PBSLP was characterized by FTIR, XRD, and SEM/energy dispersive X-ray (EDX). PBSLP was used to protect mild steel in 1 M hydrochloric acid. An SEM and an atomic force microscope (AFM) were used to characterize the surface morphology of the mild steel coupons. Potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) were used to characterize the inhibition mechanism of PBSLP, and the inhibitor was a mixed-type corrosion inhibitor with a maximum corrosion inhibition efficiency of 93.0%. Adsorption studies revealed the adsorption of PBSLP to be a monolayer process and therefore, obeyed the Langmuir isotherm model.

Corrosion behavior and wear properties of mechanically polished and electropolished powder bed fusion-built Ti-6Al-4V alloy in simulated seawater

“…The sinusoidal amplitude potential of 10 mV was applied in a similar potential as in the polarization technique. The frequency scan was from high to low [24]. The electrical equivalent circuit models were used to evaluate the passivity/activity of the passive lms formed on the Ti-6Al-4V specimen surface [25], [26].…”