High-temperature oxidation and aqueous corrosion performance of ferritic, vacuum-sintered stainless steels prealloyed with Si

Velasco, F.; Bautista, A.; González-Centeno, A.

doi:10.1016/j.corsci.2008.09.035

Cited by 25 publications

(11 citation statements)

References 28 publications

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“…Those are examples where exposed area changes during oxidative attack. This has been also demonstrated for powder metallurgy stainless exposed at high-temperature exposure [17][18][19]. Initially, oxidation affects the whole surface of the porous material.…”

Section: Resultsmentioning

confidence: 90%

Oxidation of Micro-Sized Aluminium Particles: Hollow Alumina Spheres

et al. 2013

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Oxidized aluminium microparticles have recently been proposed for manufacturing new, environmentally-friendly, protective coatings on stainlesssteels and Ni-base alloys. The oxidation mechanisms of spherical aluminium microparticles of an average particle size of 3.5 lm were studied. Accordingly, simultaneous differential thermal analysis-thermogravimetry tests were carried out in air at different temperatures, always above aluminium melting temperature. Scanning electron microscopy and XRD were also used for the interpretation of results. Weight gain and energy results were explained in terms of the different structural changes taking place in aluminium particles. Dehydroxylation process was identified. The transformation of amorphous alumina to c-Al 2 O 3 was numerically evaluated and the alumina phase transformation (c-Al 2 O 3 ?a-Al 2 O 3 ) was also studied. The temperature ranges revealed the appearance of metastable phases (h-Al 2 O 3 ). Complete oxidation of particles can be obtained at 1,300°C in \1 h, although this also takes place at lower temperatures if enough oxidation time is used. Activation energy of oxidation process at high temperature was also estimated, taking a value of 334 kJ/mol. High temperature oxidation causes the formation of hollow alumina spheres, without any aluminium left inside them.

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Section: Resultsmentioning

confidence: 90%

Oxidation of Micro-Sized Aluminium Particles: Hollow Alumina Spheres

et al. 2013

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“…Usually, ferritic steels with similar Mn and Si element content *0.5 wt% following the oxidation process exhibit merely a Si-rich oxide scale. This is due to the fact that the free Gibbs energy formation of SiO 2 at 750°C is more negative than that of MnO, -175 and -150 kcal/mol, respectively [18]. Moreover, according to the literature available, the diffusion coefficient of Mn in ferrite at 800°C is lower than the diffusion coefficient of Si, 3.2 9 10 -15 and 2.6 9 10 -15 m 2 /s, respectively [16].…”

Section: Resultsmentioning

confidence: 93%

“…Literature studies reveal that the formation of a silicarich oxide scale in the high chromium content steels improves their oxidation resistance [17][18][19]. McDowell and Basu [19] report that the silica layer can provide pathways for rapid Cr diffusion towards the surface.…”

Section: Resultsmentioning

confidence: 99%

High-temperature oxidation resistance of ultrafine-grained 14 %Cr ODS ferritic steel

Oksiuta

2013

J Mater Sci

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“…Si has a strong affinity to oxygen to form Si oxides, and Si oxides influence the formation of Cr oxides. [24,[28][29][30] In the initial oxidation stage, Si interacts with oxygen to form Si oxides containing a small amount of Fe and Cr. These oxides act as nucleation sites for Cr oxides, and help the Cr oxide layer to grow rapidly.…”

Section: Discussionmentioning

confidence: 99%

Effects of Alloying Elements on High-Temperature Oxidation and Sticking Occurring During Hot Rolling of Modified Ferritic STS430J1L Stainless Steels

Lee

Kim

et al. 2011

Metall Mater Trans A

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In the present study, mechanisms of sticking that occurs during hot rolling of modified STS430J1L ferritic stainless steels were investigated by using a pilot-plant-scale rolling machine, and the effects of alloying elements on sticking were analyzed by the high-temperature oxidation behavior. The hot-rolling test results indicated that the Cr oxide layer formed in a heating furnace was broken off and infiltrated the steel, thereby forming Cr oxides on the rolled steel surface. Because the surface region without oxides underwent a reduction in hardness rather than the surface region with oxides, the thickness of the surface oxide layer favorably affected the resistance to sticking. The addition of Zr, Cu, and Ni to the ferritic stainless steels worked in favor of the decreased sticking, but the Si addition negatively affected the resistance to sticking. In the Si-rich steel, Si oxides were continuously formed along the interfacial area between the Cr oxide layer and the base steel, and interrupted the formation and growth of the Cr oxide layer. Because the Si addition played a role in increasing sticking, the reduction in Si content was desirable for preventing sticking.

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High-temperature oxidation and aqueous corrosion performance of ferritic, vacuum-sintered stainless steels prealloyed with Si

Cited by 25 publications

References 28 publications

Oxidation of Micro-Sized Aluminium Particles: Hollow Alumina Spheres

Oxidation of Micro-Sized Aluminium Particles: Hollow Alumina Spheres

High-temperature oxidation resistance of ultrafine-grained 14 %Cr ODS ferritic steel

Effects of Alloying Elements on High-Temperature Oxidation and Sticking Occurring During Hot Rolling of Modified Ferritic STS430J1L Stainless Steels

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