High-temperature oxidation behaviour of EN-1.4301 stainless-steel after surface Ce deposition by a modified CVD method

Abstract

The oxidation of EN-1.4301 (18Cr-8Ni) stainless-steel specimens after Ce deposition at 1173 K under synthetic air is studied. Cerium deposition was carried out by pyrolysis of Ce(NO 3 ) aerosols. Thermogravimetric results show that total mass gain after 22 h of oxidation is one order of magnitude smaller than for the untreated specimen, indicating that the deposition treatment is very effective in increasing the oxidation resistance of EN-1.4301 stainless steel. After oxidation the scale is composed mainly of Cr 2 O 3 and Cr-Mn spinels. Preoxidation in air of the stainless steel prior to Ce deposition does not alter significantly the composition of the oxide scale except for a slight increase in iron content and a reduction in mass gain and thickness of the oxide layer. Rutherford backscattering spectrometry data confirm these results and show a homogeneous in-depth distribution of Ce along the oxide scale. The presence of cerium oxide particles in the scale, in contrast to the presence of perovskite phases on depositing lanthanum, suggests that the silica layer found at the alloy/scale interface could be responsible for the reactive element effect.

AISI 304 austenitic stainless steel monoliths: Modification of the oxidation layer and catalytic coatings after deposition and its catalytic implications

“…cerium, in the catalytic layer. It has been evidenced that cerium deposited on stainless steels surfaces migrates to the alloy/scale interface affecting the characteristics and properties of the oxide scale layer [8][9][10] whatever the deposition method: pyrolysis of aerosols, ion implantation, immersion in cerium nitrate or sol-gel oxide precursor solutions [8,[11][12][13].…”

Au/CeO2 metallic monolith catalysts: influence of the metallic substrate

“…The migration of cerium deposited on top of stainless steels to the alloy/scale interface has been widely demonstrated to occur independently of the way in which cerium were deposited: pyrolysis of aerosols, ion implantation or immersion in cerium nitrate solutions [29,30]. Besides this, our SEM-EDX and GD-OES results show that the diffusion of several cations from the oxide scale of the metallic alloy to the catalytic layer also occurs.…”

Preparation and Property of Ceramic Matrix Coating of Anti-Oxidation for Stainless Steel at High Temperature by Slurry Method

“…Many coatings could offer good oxidation protection for stainless steel and act as a barrier to reduce the ingress of oxygen at elevated temperature [2][3][4][5]. However, high cost and hard removable coating during cooling make these techniques inapplicable in the reheating operation.…”