Aços Inoxidáveis Aplicados Na Indústria Petroquímica: Estudo Comparativo Da Resistência À Corrosão Por Técnicas Eletroquímicas

Luiz, Leonardo; Henke, Sérgio Luiz; Kurelo, Bruna Corina Emanuely Schibicheski; Souza, Gelson Biscaia de; Andrade, Juliano de; Marino, Cláudia Eliana Bruno

doi:10.4322/2176-1523.20201960

Cited by 4 publications

(2 citation statements)

References 14 publications

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“…The good corrosion resistance of these materials is provided by the formation of a continuous and thin oxide film, mainly of Cr2O3, on the surface (DONIK et al, 2009;LUIZ et al, 2020;ÖRNEK et al, 2019). In this regard, the existence of a passive film for superduplex steel type UNS S32750 is considered by (ÖRNEK et al, 2019) generally in the form of a double oxide/hydroxide layer, one as a barrier layer rich in Cr and a superior external one in Fe.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of voltametric profiles for quantitative estimation of sigma phase (σ) content in duplex stainless steel UNS S31803: an ohmic and layers porous resistance models (LPRM) analysis

Rios¹,

Forteski²,

Ponte³

et al. 2023

Braz. J. Develop.

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The voltammetric profile parameters of potential and peak current intensity, for different scan rates were obtained for heat treated duplex stainless-steel samples. The Ohmic and Layer Porous Resistance models were considered for quantitative estimation of deleterious phase surface content (sigma phase). A 4 mol L-1 KOH selective solution and a specially designed electrolytic cell were used. The observed linear slope for vs and Ip vs linearity profiles are in accordance with the considered LPR Model. The parameter profile of peak potential (), with the square root of the scan rate (1mV s-1, 2 mV s-1, 5 mV s-1, 7 mV s-1 and 10 mV s-1.), suggests the growth of a film rich in Fe and Cr content that could be correlated to the sigma phase level with the dependence of on scan rate been considered a better parameter, than peak current, for detect small levels of sigma phase for a specific scan rate. The non-dependence of from surface area, make it a more feasible parameter for a lower sigma phase level quantitative analysis.

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Section: Introductionmentioning

confidence: 99%

Evaluation of voltametric profiles for quantitative estimation of sigma phase (σ) content in duplex stainless steel UNS S31803: an ohmic and layers porous resistance models (LPRM) analysis

Rios¹,

Forteski²,

Ponte³

et al. 2023

Braz. J. Develop.

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“…Among the causes of this phenomenon is the action of chloride ions from seawater. Motivated by the economic importance of this industry and the damages caused by the mentioned factors, many technologies have been developed with the aim of reducing or inhibiting corrosion in these highly aggressive environments [1].…”

Section: Introductionmentioning

confidence: 99%

Experimental and Numerical Study of Eletrodeposition Phenomena of Cobalt-Tungsten (Co-W) Metal Alloys

Lima,

Neto

2024

JER

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Among the constant problems in petroleum and natural gas engineering, severe corrosion issues are observed in equipment used for storage, transportation, and production of oil and its derivatives. These problems are generated by various mechanisms such as stress from mechanical loads or compounds found in their composition. These occurrences can lead to accidents involving human lives, environmental disasters, and economic losses. As a means of mitigating this problem, the electrodeposition of metallic coatings has proven to be an economical option for covering metal structures, especially when it comes to tungsten-based coatings combined with iron group ions (Ni, Fe, Co).The literature reports few studies on electrodeposition from the perspective of numerical analysis and computer simulation, which would provide a better understanding of the effectiveness and properties of these materials. Therefore, this work aimed to study the numerical and experimental analysis of the steady-state behavior of electrodeposition while conducting experiments on the deposition of the Co-W alloy. The goal was to evaluate the phenomenon of diffusion and forced convection. In this context, results of deposition rates were obtained with magnitudes similar to experimental rates, proving that the analysis is compatible with reality. Another interesting point was the use of both techniques and how the influences of concentration and rotation acted together, showing synergy between the results. In the experimental part, the best coating, with the highest efficiency, was obtained at 30 rpm, 0.15 mol/L sodium tungstate, and pH 6. The simulation identified, just like the experimental results, that a concentration of 0.15 mol/L is ideal, emphasizing that concentration is the most influential factor in the process.

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A new ecological and low-cost alternative based on the electrolytic dissolution of stainless steel for the immediate voltammetric determination of manganese using 3D printed electrodes

Luiz Mendes Fernandes,

Pedrosa Lisboa,

Burger Veríssimo de Oliveira

et al. 2024

Microchemical Journal

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Aços Inoxidáveis Aplicados Na Indústria Petroquímica: Estudo Comparativo Da Resistência À Corrosão Por Técnicas Eletroquímicas

Cited by 4 publications

References 14 publications

Evaluation of voltametric profiles for quantitative estimation of sigma phase (σ) content in duplex stainless steel UNS S31803: an ohmic and layers porous resistance models (LPRM) analysis

Evaluation of voltametric profiles for quantitative estimation of sigma phase (σ) content in duplex stainless steel UNS S31803: an ohmic and layers porous resistance models (LPRM) analysis

Experimental and Numerical Study of Eletrodeposition Phenomena of Cobalt-Tungsten (Co-W) Metal Alloys

A new ecological and low-cost alternative based on the electrolytic dissolution of stainless steel for the immediate voltammetric determination of manganese using 3D printed electrodes

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