Effect of CO₂ on Anti-Corrosion Property of a Polyurea Coating Modified with Organosilicone

Abstract:

The corrosion mechanism of organic silicon modified polyurea composite coating under different CO₂ partial pressures was studied using high-temperature autoclave, combined with scanning electron microscopy (SEM), adhesion tests and electrochemical impedance spectroscopy (EIS) technology. The experimental results showed that: there was no corrosion product formed on the surface of coating sample after high-temperature high-pressure corrosion test, and with the increasing of CO₂ partial pressure, the coating adhesion and impedance values decline increases. Moreover CO₂ partial pressure increases accelerated the failure process of polyurea composite coating system.

• Periodical: Materials Science Forum (Volume 789)
• Pages: 466-470
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.789.466
• Online since: April 2014
• Authors: Qing Hao Shi, Bing Ying Wang*, Bin Zhao
• Keywords: CO₂ Partial Pressure, Corrosion, EIS, High Temperature High Pressure, Polyurea

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