Galakhova, A., Kadisch, F., Mori, G., Heyder, S., Wieser, H., Sartory, B., Wosik, J., Schwarz, S., & Burger, S. (2023). Corrosion of 1.4016 Ferritic Steel by Urea at High Temperature. Journal of Materials Engineering and Performance. https://doi.org/10.1007/s11665-023-08024-y
The corrosion behavior of a ferritic unstabilized stainless steel 1.4016 during decomposition of aqueous urea solution at high temperature has been investigated. Corrosion was obtained from 100 h of cyclic heating (from room temperature up to 600 °C) and injection of aqueous urea solution on the steel plate in a laboratory-scale test bench. The evaluation procedure covered the metallographic analysis of corroded steel samples by high-resolution scanning electron microscopy (HR-SEM) and transmission electron microscopy (TEM). Uniform corrosion underneath deposits was found as one of the drivers for degradation of the steel. Damage happened by high-temperature depassivation of stainless steel due to the excess of the aggressive medium. Besides uniform corrosion, a nitridation layer underneath surface oxides together with chromium carbonitride particles precipitated through the whole depth of the sample was identified resulting in intergranular attack.
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Research facilities:
Universitäre Service-Einrichtung für Transmissionselektronenmikroskopie
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Research Areas:
Metallic Materials: 34% Materials Characterization: 33% Surfaces and Interfaces: 33%
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