Effects of Oxides Contents in Vanadium Slag on Corrosion Mechanism of MgO-C Bricks

Wang, Guang-en; Wang, Yu; Xie, Bing; Li, Xinsheng; Guo, Xu; Li, Xiaojun

doi:10.1016/s1006-706x(12)60149-6

Cited by 15 publications

(12 citation statements)

References 8 publications

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“…[29] The higher energy contribution might be assigned to amino groups which are coordinated to the metal ions in the surface or to protonated amino groups. [30] The corresponding Si2p spectrum could be described by a single component located at 102.2 eV and is according to its binding energy related to the siloxane groups C-Si(OSi) 3 . [31] Both the PM-IRRAS data and the XPS analysis indicate an extremely thin film with a thickness less than the information depth of the XPS analysis (typically 5-10 nm).…”

Section: Resultsmentioning

confidence: 99%

Scanning Kelvin probe blister studies of the delamination of epoxy films on organosilane modified ZnMgAl alloy coated steel

Grothe

Wiesing

Giner

et al. 2017

Materials & Corrosion

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The scanning Kelvin probe blister test (SKP‐BT) was applied to study the corrosive delamination of model epoxy films applied to ZnMgAl alloy coated steel substrates. This test allowed the superimposition of mechanical and corrosive load. Moreover, ultra‐thin 3‐aminoproptriethoxysilane (γ‐APS) films were studied as adhesion promoting and corrosion protecting films, which inhibit the delamination process. The surface of the ZnMgAl alloy coating with and without applied ultra‐thin organosilane thin films were analyzed by polarization modulation infrared reflection absorption spectroscopy (PM‐IRRAS) and X‐ray photoelectron spectroscopy (XPS). The spectroscopic results show films that are only few nanometer thick, and therefore cannot act as efficient barrier films. However, peel‐force studies and SKP‐BT results show an effective inhibition of the delamination process of the epoxy film for the interface which was chemically modified by γ‐APS. The effect of the interfacial layer is mainly assigned to the higher wet‐adhesion based on the interaction of silanol groups with thin surface oxides and carbonates of the alloy. Raman spectroscopic analysis showed that the delamination on samples without organosilane thin films is based on a preceding cathode and a subsequent mixed corrosion. Only a minor cathodic delamination was observed on γ‐APS modified samples.

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Section: Resultsmentioning

confidence: 99%

Scanning Kelvin probe blister studies of the delamination of epoxy films on organosilane modified ZnMgAl alloy coated steel

Grothe

Wiesing

Giner

et al. 2017

Materials & Corrosion

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show abstract

“…[8][9][10] However, the MgO-C refractory lining in vanadium extraction BOF also suffers great corrosion and slag splashing has not been applied for maintainence. [10][11][12][13] The FeO-SiO 2 -MnO-V 2 O 3 -TiO 2 system slag (Vanadium slag) from vanadium extraction BOF has high content iron oxides, about 36 wt%, which leads to high oxidizability. The content of CaO remains low because of subsequent sodium roasting and leaching process, which has load iron oxides in the slag mainly exist in iron protoxide (FeO).…”

Section: Melting and Crystallization Behaviors Of Modified Vanadium Smentioning

confidence: 99%

Melting and Crystallization Behaviors of Modified Vanadium Slag for Maintenance of MgO–C Refractory Lining in BOF

et al. 2019

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“…Then, this slag is treated by sodium roasting to obtain V 2 O 5 . Hence, VECs are a very important component in the vanadium production process as they affect not only the vanadium yield but the grade of the vanadium slag …”

Section: Introductionmentioning

confidence: 99%

“…It was suggested that slag can penetrate into the interior of MgO particles through the subgrain boundary and cause them to disintegrate . Wang et al investigated the influences of V 2 O 3 , FeO, TiO 2 , MnO, and MgO in vanadium slag on the corrosion mechanism of MgO‐C bricks by conducting stationary immersion tests at 1623 K. The results indicated that FeO, TiO 2 , and MnO enhance the corrosion rate but V 2 O 3 and MgO decrease it . However, the erosion mechanism of each oxide in MgO‐C refractory and the influence of oxide erosion on damage mechanism of MgO‐C refractory have not been studied in the study, it is necessary to study the erosion and damage mechanism of each oxide in refractory to provide a theoretical basis for the subsequent modification of slag and development of a novel refractory.…”

Section: Introductionmentioning

confidence: 99%

Corrosion mechanism of MgO‐C bricks used as linings in a vanadium extraction converter

Huang

Liu

Mĭn

et al. 2020

Int J Applied Ceramic Tech

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To extend the service life of MgO-C bricks used as linings in vanadium extraction converters, their corrosion mechanism was investigated using stationary immersion and rotary crucible methods at 1673 K. The effects of oxides in vanadium slag were studied using the slag invasion method. The results showed that a decarburization layer was formed but was not effectively sintered under vanadium extraction conditions, resulting in it having a loose structure and poor binding strength. When slag-splashing technology was applied to protect the converter, the decarburization layer and slag-splashing layer easily fell off due to scouring by the molten pool.Consequently, the poor strength of the decarburization layer was the main reason for the poor anti-erosion performance of the MgO-C bricks and the weak effect of slagsplashing technology. In addition, higher contents of SiO 2 and TiO 2 in vanadium slag could form low melting point compounds and increase the thickness of the decarburization layer, thereby accelerating the MgO-C brick corrosion rate. Higher contents of FeO in the vanadium slag not only formed low melting point compounds but also caused a decarburization reaction with the MgO-C bricks. However, with increases of V 2 O 3 in the slag, the formation of high melting point compounds decreased the corrosion rate and corrosion depths. K E Y W O R D Scorrosion mechanism, MgO-C brick, sinterability, vanadium extraction converter, vanadium slag

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Effects of Oxides Contents in Vanadium Slag on Corrosion Mechanism of MgO-C Bricks

Cited by 15 publications

References 8 publications

Scanning Kelvin probe blister studies of the delamination of epoxy films on organosilane modified ZnMgAl alloy coated steel

Scanning Kelvin probe blister studies of the delamination of epoxy films on organosilane modified ZnMgAl alloy coated steel

Melting and Crystallization Behaviors of Modified Vanadium Slag for Maintenance of MgO–C Refractory Lining in BOF

Corrosion mechanism of MgO‐C bricks used as linings in a vanadium extraction converter

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