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Hiramatsu, Naoto; Stott, F.H.

doi:10.1023/a:1004689211302

Cited by 15 publications

(7 citation statements)

References 7 publications

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“…This was entirely in accord with observations at higher temperatures (up to <1100uC). 11,16,17 However, at the higher temperatures, the chromia subscale had a different morphology to that formed at 900uC, in that the Cr 2 O 3 layer was continuous and essentially of uniform thickness. Across the whole temperature range, however, the slow ongoing oxidation rate undoubtedly derived from the thickening of the chromia subscale pitting attack or layer and was controlled by the (linear) rate of oxygen penetration through the alumina outer scale.…”

Section: Discussionmentioning

confidence: 99%

Air oxidation of commercial FeCrAlRE alloy foils between 800 and 950°C

Tatlock¹,

Al‐Badairy²,

Bennett³

et al. 2005

Materials Science and Technology

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The oxidation behaviour of 30 mm and 50 mm thick Aluchrom YHf and 50 mm thick Kanthal AF foils have been examined during discontinuous exposure (100 h cycles) to laboratory air at 800, 850, 900 and 950uC. Oxidation was continued out to 3000 h or until chemical failure ensued, whichever was the shorter. Resulting observations include two oxidation temperature domains, a two-stage oxidation process leading to a duplex (transitional-a) alumina scale and ultimately, a two-stage chemical failure process of the oxide scale leading to breakaway/non-protective attack. To unravel the underlying mechanisms involved, the scales were examined by a range of microscopy and analytical techniques, including optical and scanning electron microscopy (SEM), electron microprobe analysis (EPMA), energy dispersive X-ray analysis (EDX) and X-ray diffraction (XRD).

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Section: Discussionmentioning

confidence: 99%

Air oxidation of commercial FeCrAlRE alloy foils between 800 and 950°C

Tatlock¹,

Al‐Badairy²,

Bennett³

et al. 2005

Materials Science and Technology

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“…Nb and Ti were mainly present on the surface of the oxide scale. These elements may have great impact on the oxidation behaviour of FeCrAl alloys [5][6][7]. To elucidate oxidation behaviour further a time-resolved study of the development of the scale and of the alloy substrate would be very helpful.…”

Section: Discussionmentioning

confidence: 99%

Cyclic Oxidation of Two FeCrAlRE Foils at 1100 °C - The Influence of the Concentration of Minor Alloying Elements on Scale Microstructure

Liu

Götlind

Canovic

et al. 2008

MSF

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Two FeCrAlRE alloys, a commercial, 0C404, and a model alloy in the form of thin foils, with different Mn, Nb, Mo and Ti concentrations were subjected to cyclic oxidation in lab air at 1100°C. The oxidized samples were studied by gravimetry, Grazing-Incidence X-ray Diffraction (GI-XRD), Scanning Transmission Electron Microscopy (STEM), and Energy Dispersive X-ray (EDX) analysis. The two FeCrAl alloys exhibit different oxidation kinetics; however, both alloys have the same weight gain after 500 hours exposure. During the early stages the scale consists mainly of α-Al2O3 together with some oxide particles containing Mn, Al, Fe and Cr formed on the alloys. After 500 hours the 0C404 scale locally also consists of larger polycrystalline regions of Mn-Cr-Al spinel. In addition, Si-rich oxide, chromia and Al-Cr oxide could be observed at the metal/oxide interface.

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“…It has been known to improve the corrosion resistance of stainless steels alloys and steels containing this element tend to be more resistant than molybdenum-free grades 19,20 . Molybdenum has been known to be a ferrite former which in the presence of manganese and nickel it keeps the structure of 316SS austenitic 21 . In H2SO4/ NaCl media it enriches Cr and Mo at the metal/ solution interface which stabilizes and thickens the passive film of 316SS [22][23][24][25][26][27] .…”

Section: Potentiodynamic Polarization Studiesmentioning

confidence: 99%

Study of the Corrosion Resistance of Type 304L and 316 Austenitic Stainless Steels in Acid Chloride Solution

Loto¹

2017

Orient. J. Chem

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The corrosion resistance of type 304L and 316 austenitic stainless steels in 2M H 2 SO 4 at 0-1.5%NaCl concentrations was studied through potentiodynamic polarization technique and optical microscopy analysis. The corrosion rate, pitting potential, passivation potential and surface morphology of both steel where significantly altered by the Clion concentration, alloy composition and metallurgical properties of the steels. Results showed that 316 stainless steel significantly performed better than the 304L counterpart with the unusual phenomenon of decreasing corrosion rate with increase in Clion concentration. 304L steel showed no passivation and resistance to pitting after 0% NaCl concentration coupled with increase in corrosion rate. Despite similar elemental composition, the presence of molybdenum had a strong influence on the corrosion resistance and passivation of 316 steel. The surface morphology of 316 steel showed mild deterioration compared to severe surface deterioration, and visible micro/macro-pits on 304L.

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Untitled

Cited by 15 publications

References 7 publications

Air oxidation of commercial FeCrAlRE alloy foils between 800 and 950°C

Air oxidation of commercial FeCrAlRE alloy foils between 800 and 950°C

Cyclic Oxidation of Two FeCrAlRE Foils at 1100 °C - The Influence of the Concentration of Minor Alloying Elements on Scale Microstructure

Study of the Corrosion Resistance of Type 304L and 316 Austenitic Stainless Steels in Acid Chloride Solution

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