The influence of superficially applied oxide powders on the high-temperature oxidation behavior of Cr2O3-forming alloys

High Temperature Oxidation Behavior of Yttrium Dioxide Coated Fe-20Cr Alloy

“…7c. The results of EDS analysis at regions 1, 2 and 3 are shown in Table 4 3 , quite similar to that on the specimen that was oxidised for 200 h at 1000 °C.…”

“…The use of reactive elements, especially rare earths (RE) to improve high temperature oxidation resistance of chromium dioxide and alumina forming alloys is quite well documented. [1][2][3][4][5][6][7][8][9][10][11][12][13][14] The improvements are in the form of reduced oxidation rates and increased scale adhesion. The RE can be added to the alloy in elemental form or as oxide dispersions.…”

“…It can also be applied as an oxide coating to the alloy surface. [3][4][5][6][7]15 Various mechanisms have been proposed to explain the effect of reactive elements in improving oxidation resistance and the most widely accepted mechanism attributes it to segregation of the reactive elements to the interface or to the oxide scale grain boundaries and blocking of Cr ion diffusion though the oxide scale [8][9][10][11] Studies carried out by Seo et al, about the effect of addition of Ce, La and Y to a Fe-22Cr-0.5Mn alloy on the oxidation behavior of the alloy at 800 °C, indicated that Y was the most effective element to reduce the growth rate of the oxide scale. 12 In recent years a number of studies have been carried out to exploit the benefits of rare earth additions on oxidation behavior of chromium dioxide and alumina forming alloys.…”

Protection of stainless-steels against corrosion in sulphidizing environments by Ce oxide coatings: X-ray absorption and thermogravimetric studies

“…This is similar to earlier results of Bennett et al [3], who found a favourable influence of pre-oxidation on the behaviour of cerium oxide coatings on a 20/25/Nb chromium~nickel steel. By contrast Ecer et al [2] found a beneficial effect on the oxidation rate of Ni-and Fe-base alloys when no preoxidation had been applied. Our results show that preoxidation.…”

Protection of stainless-steels against corrosion in sulphidizing environments by Ce oxide coatings: X-ray absorption and thermogravimetric studies

“…For oxidizing environments Ecer et al [2]. found that a very good resistance could be obtained by dipping Ni-or Fe-base alloys in a slurry of CeO, in ethanol, followed by drying and sintering in air.…”