ArticleBMC chemistry2026
Acid-phase protection of carbon steel by lauramidopropyl amine oxide: evidenced by ICP-AES, electrochemical methods, severe-condition testing, and atomistic modeling.
Article in BMC chemistry, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
The corrosion-inhibition performance of commercial lauramidopropyl amine oxide (LAO) toward carbon steel in 0.5 M HCl was evaluated through a combined experimental and computational workflow. Dissolved metal release was quantified by ICP-AES, while potentiodynamic polarization (PDP), electrochemical impedance spectroscopy (EIS), and linear polarization resistance (LPR) were used to probe the interfacial electrochemical response at 293 K. LAO suppressed steel dissolution in a concentration-dependent manner. Based on ICP-AES, the inhibition efficiency increased from 76.5% at 50 ppm to 85.5% at 600 ppm. Electrochemical methods showed the same trend, and at 1200 ppm the inhibition efficiency reached 95.0%, 97.6%, and 97.5% according to PDP, EIS, and LPR, respectively. The small displacement in corrosion potential indicates mixed-type inhibition, whereas the marked increase in charge-transfer resistance and the decrease in double-layer capacitance support the formation of an adsorbed protective layer. Adsorption analysis was consistent with Langmuir-type behavior after converting the inhibitor concentration to molar active-LAO units and afforded ΔG°
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