Characterization and Corrosion Behaviour of Selected Duplex Stainless Steels in Acidic and Acidic-Chloride Solution

Olaseinde, Oluwatoyin Adenike; Merwe, Joasias Van der; Cornish, L.A.

doi:10.4236/aces.2014.41012

Cited by 16 publications

(11 citation statements)

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“…Other orientations (211), (220), and (301) are also observed in both substrates, but with less preference . For the film on the stainless steel, (110), (200), and (211) peaks from the stainless steel substrate are also observed . Broader features are observed in the diffraction pattern of the film on soda lime glass.…”

Section: Resultsmentioning

confidence: 85%

Morphological and optical properties of low temperature processed SnO₂ :F

Uprety

Lambright

Grice

et al. 2017

Phys. Status Solidi B

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Thin films of transparent conducting fluorine doped tin oxide (SnO2:F) on soda lime glass and stainless steel substrates are prepared by spray pyrolysis at low temperature ≤250 °C. Optical properties in the form of complex dielectric function (ϵ = ϵ1 + iϵ2) spectra are obtained using spectroscopic ellipsometry from 0.035 to 5.89 eV for SnO2:F on glass and from 0.75 to 5.89 eV for SnO2:F on stainless steel. The absorption coefficient (α) spectra are extracted from spectra in ϵ for the film on soda lime glass from 0.035 to 5.89 eV and on stainless steel from 0.75 to 5.89 eV. Direct band gaps for SnO2:F thin films on soda lime glass and stainless steel substrates are determined to be 3.45 ± 0.01 and 3.60 ± 0.01 eV, respectively. Infrared extended measurement shows an absorption feature at 0.063 eV (508 cm−1) which may be attributed to Sn–O and Sn–F bonding. A broad background phonon absorption feature due to Sn–OH and O–H bonding is also identified at 0.3 eV (2420 cm−1). Resistivity is deduced from ϵ. Improved agreement between optically and electrically determined resistivity is obtained when the infrared range spectrum is analyzed. The morphologies of both the films are studied by X‐ray diffraction (XRD), scanning electron microscopy (SEM), and atomic force microscopy (AFM).

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Section: Resultsmentioning

confidence: 85%

Morphological and optical properties of low temperature processed SnO₂ :F

Uprety

Lambright

Grice

et al. 2017

Phys. Status Solidi B

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“…The 2205 have better corrosion resistance than low nickel duplex stainless steels [5] while the 316 had better corrosion resistance than most austenitic stainless steels.…”

Section: Introductionmentioning

confidence: 95%

“…Duplex stainless steels (DSS) are family of steels having a two-phase microstructure with roughly the same volume fractions of ferrite and austenite. The advantageous properties of duplex stainless steels are based on the equilibrium of the microstructure [1]- [5]. The combination improved the mechanical properties and corrosion resistance of these steels [2].…”

Section: Introductionmentioning

confidence: 99%

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Comparative Study of the Effect of Temperature on the Corrosion Behaviour of 2205 Duplex Stainless Steel and 316 Austenitic Stainless Steel in Acidic Chloride Environment

Olaseinde¹

2015

AMPC

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The 2205 duplex stainless steel and 316 austenitic stainless steels were studied in 1 M sulphuric acid and 1% NaCl solution. The microstructures of the specimens were investigated with scanning electron microscopy with energy dispersive X-ray analysis. X-ray Diffraction analysis was used for phase analysis. The electrochemical behaviour was evaluated using potentiodynamic method. The results show that the critical current density is higher for 316 austenitic stainless steels than 2205. The passive range was longer for 316 than 2205 at all the temperatures understudy. 2205 was found to have better corrosion resistance than 316.

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“…Em geral, a proporção entre as fases é de 50%, podendo variar de 30% a 70% de ferrita [1,2,3,4]. Para que essas proporções sejam atingidas, os aços duplex são submetidos à laminação a quente ou forjamento, laminação a frio, seguida de um recozimento para recristalização [5,6].…”

Section: Introductionunclassified

Efeito Da Temperatura De Recozimento Na Precipitação Da Fase Sigma No Aço Inoxidável Duplex Uns 31803

Maria¹,

Dias²,

Alves³

et al. 2017

Anais Do Congresso Anual Da ABM

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ResumoO aço inoxidável duplex combina as propriedades mecânicas da ferrita à resistência à corrosão da austenita, sendo muito utilizado em aplicações industriais que requerem um bom desempenho quanto a essas propriedades. Quando esse aço é submetido a ciclos térmicos, fases secundárias podem se precipitar, o que causa a deterioração de suas propriedades. Dentre as fases que podem surgir, a fase sigma é a de maior relevância. O presente trabalho tem como objetivo avaliar e quantificar a precipitação da fase sigma quando o aço duplex UNS 31803 é submetido ao recozimento em diferentes temperaturas. Para essa análise foram utilizados a microscopia óptica e eletrônica, difração por elétrons retroespalhados, difração de raios -X, e espectometria de raios -X por dispersão em energia. Observou -se a presença da fase sigma em três das quatro condições adotadas no trabalho. A presença mais acentuada da fase foi observada na condição em que a velocidade de precipitação é máxima. Palavras-chave: Aço inoxidável duplex; Fase sigma; Fases intermetálicas. EFFECT OF ANNEALING TEMPERATURE ON THE PRECIPITATION OF SIGMA PHASE IN DUPLEX STAINLESS STEEL UNS 31803 AbstractThe duplex stainless steel combines the mechanical properties of ferrite and the corrosion resistance of austenite, widely used in industrial applications that require a good performance in terms of these properties. When this steel is subjected to thermal cycles, secondary phases can precipitate, which causes the deterioration of its properties. The sigma phase is the most relevant between the precipitates which may be formed. The aim of this work is to evaluate and quantify the precipitation of sigma phase when the Duplex UNS 31803 steel is subjected to annealing at different temperatures. For this analysis were used optical and electron microscopy, electron backscattered diffraction, diffraction X -ray spectrometry and X -ray dispersive energy. The sigma phase was observed in three of the four conditions adopted in work. The presence of phase was observed so more pronounced in the condition where the precipitation velocity is maximal.

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Characterization and Corrosion Behaviour of Selected Duplex Stainless Steels in Acidic and Acidic-Chloride Solution

Cited by 16 publications

References 3 publications

Morphological and optical properties of low temperature processed SnO₂ :F

Morphological and optical properties of low temperature processed SnO₂ :F

Comparative Study of the Effect of Temperature on the Corrosion Behaviour of 2205 Duplex Stainless Steel and 316 Austenitic Stainless Steel in Acidic Chloride Environment

Efeito Da Temperatura De Recozimento Na Precipitação Da Fase Sigma No Aço Inoxidável Duplex Uns 31803

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Characterization and Corrosion Behaviour of Selected Duplex Stainless Steels in Acidic and Acidic-Chloride Solution

Cited by 16 publications

References 3 publications

Morphological and optical properties of low temperature processed SnO2 :F

Morphological and optical properties of low temperature processed SnO2 :F

Comparative Study of the Effect of Temperature on the Corrosion Behaviour of 2205 Duplex Stainless Steel and 316 Austenitic Stainless Steel in Acidic Chloride Environment

Efeito Da Temperatura De Recozimento Na Precipitação Da Fase Sigma No Aço Inoxidável Duplex Uns 31803

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Morphological and optical properties of low temperature processed SnO₂ :F

Morphological and optical properties of low temperature processed SnO₂ :F