TY - JOUR

T1 - Corrosion of 1.4016 Ferritic Steel by Urea at High Temperature

AU - Galakhova, Anastasiia

AU - Kadisch, Fabian

AU - Mori, Gregor Karl

AU - Heyder, Susanne

AU - Wieser, Helmut

AU - Sartory, Bernhard

AU - Wosik, Jaroslaw

AU - Schwarz, Sabine

AU - Burger, Simon

N1 - Publisher Copyright: © 2023, The Author(s).

PY - 2023/3/9

Y1 - 2023/3/9

N2 - 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.

AB - 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.

UR - http://www.scopus.com/inward/record.url?scp=85149498721&partnerID=8YFLogxK

U2 - 10.1007/s11665-023-08024-y

DO - 10.1007/s11665-023-08024-y

M3 - Article

VL - 32.2023

SP - 9153

EP - 9162

JO - Journal of Materials Engineering and Performance

JF - Journal of Materials Engineering and Performance

SN - 1059-9495

IS - October

ER -