The mechanism of corrosion of Fe-9%Cr alloys in carbon dioxide

Taylor, Mark; Calvert, J.M.; Lees, D. G.; Meadowcroft, D. B.

doi:10.1007/bf00603476

Cited by 63 publications

(28 citation statements)

References 7 publications

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Section: Mechanism Of Duplex Oxide Layer Formation On T91supporting

confidence: 92%

“…This is in good agreement with the observations of Taylor et al [18] who carried out at 580°C and 1 atm sequential oxidation tests on 9 wt% Cr steel with isotopic labelled oxygen C 16 O 2 -C 18 O 2 . They showed that the gas/oxide and oxide/metal interfaces got enriched in 18 O. The formation of a similar duplex oxide layer with almost identical thicknesses ratio was observed on Fe-Cr alloys in past studies in CO 2 [10,19] and in other environments containing oxygen-bearing molecules such as H 2 O [20], SO 2 [21], and (Pb-Bi)-O [12][13][14].…”

Section: Mechanism Of Duplex Oxide Layer Formation On T91supporting

confidence: 92%

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Corrosion of 9Cr Steel in CO2 at Intermediate Temperature I: Mechanism of Void-Induced Duplex Oxide Formation

et al. 2011

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Under CO 2 exposure at an intermediate temperature, typically 550°C, 9Cr-1Mo steel forms a duplex oxide scale made of an outer magnetite layer and an almost-as-thick inner Fe-Cr rich spinel oxide layer. It is proposed that the inner Fe-Cr spinel layer grows according to a mechanism involving void formation at the oxide/ metal interface. The driving force for pore formation is the outward magnetite growth: iron vacancies are injected at the oxide/metal interface then condense into voids. The fresh metallic surface made available is then oxidized by CO 2 , which diffuses fast through the scale. The physical aspects, the integrity and the nature of the scale are shown to be very dependent on the oxygen potential existing in the environment.

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Section: Mechanism Of Duplex Oxide Layer Formation On T91supporting

confidence: 92%

Section: Mechanism Of Duplex Oxide Layer Formation On T91supporting

confidence: 92%

Corrosion of 9Cr Steel in CO2 at Intermediate Temperature I: Mechanism of Void-Induced Duplex Oxide Formation

et al. 2011

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“…This structure, illustrated in Fig. 2, is typical of dilute Fe-Cr alloys and has been observed by others after exposure to CO 2 [5,13] and CO 2 -H 2 O [1,14] in the temperature range 550-900°C.…”

Section: Formation Of External Oxide Scalessupporting

confidence: 74%

Carburisation of ferritic Fe–Cr alloys by low carbon activity gases

Gheno¹,

Monceau²,

Zhang³

et al. 2011

Corrosion Science

155

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“…The inner oxide compositions are consistent with the experimental results from martensitic Optifer IVc and EP823 steels in LBE [1] and Fe-9%Cr alloy in air [16]. While Fazio et al [5] reported that the inner oxide layer is composed of Fe(Fe 1Àx Cr x )O 4 for MANET and F82H steels.…”

Section: Oxide Compositionssupporting

confidence: 71%

“…It was reported that the interface between the outer and inner oxide layers (magnetite/spinel) was smooth and coincided with the original steel surface for oxidation in gaseous environment [16] and steam [18]. The typical thickness ratio of the inner layer to the outer layer is between 1:1.1 (Ref.…”

Section: Oxide Compositionsmentioning

confidence: 98%