Influence of nickel additions on the corrosion behaviour of low nitrogen 22% Cr series duplex stainless steels

Potgieter, J.H.; Olubambi, Peter Apata; Cornish, L.A.; Machio, C.N.; Sherif, El‐Sayed M.

doi:10.1016/j.corsci.2008.05.023

Cited by 168 publications

(67 citation statements)

References 27 publications

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“…52 It has been reported that the Ni content is critically important for pitting corrosion and associated corrosion behaviour, because it decreases the active dissolution rate of the metal. 53,54 Thus, larger Ni contents can retard corrosion incubation time and improve the re-passivation kinetics of the stainless steel. 53 The Ni content in 2202 DSS is low (max.…”

Section: Discussionmentioning

confidence: 99%

Time-dependent in situ measurement of atmospheric corrosion rates of duplex stainless steel wires

et al. 2018

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Corrosion rates of strained grade UNS S32202 (2202) and UNS S32205 (2205) duplex stainless steel wires have been measured, in situ, using time-lapse X-ray computed tomography. Exposures to chloride-containing (MgCl 2 ) atmospheric environments at 50°C (12-15 M Cl − and pH~5) with different mechanical elastic and elastic/plastic loads were carried out over a period of 21 months. The corrosion rates for grade 2202 increased over time, showing selective dissolution with shallow corrosion sites, coalescing along the surface of the wire. Corrosion rates of grade 2205 decreased over time, showing both selective and pitting corrosion with more localised attack, growing preferentially in depth. The nucleation of stress corrosion cracking was observed in both wires.

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Section: Discussionmentioning

confidence: 99%

Time-dependent in situ measurement of atmospheric corrosion rates of duplex stainless steel wires

et al. 2018

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“…Um aumento do teor de níquel na liga contribui para o aumento da resistência à corrosão uniforme e por pite [11]. Entretanto, tais elementos contribuem para um aumento do PRE N apenas na ZF, não impactando na resistência à corrosão localizada da ZTA, que foi a região preferencialmente atingida.…”

Section: Avaliação Da Soldagem Multipasse De Chapas Espessas De Aços unclassified

Avaliação da soldagem multipasse de chapas espessas de aços inoxidáveis lean duplex UNS S32304 soldadas pelos processos SMAW, GMAW e FCAW -: resistência à corrosão

Souza¹,

Lins

Silveira

et al. 2013

Soldag. insp.

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Resumo Os aços inoxidáveis duplex (AID) vêm IntroduçãoOs aços inoxidáveis duplex são utilizados industrialmente devido à sua resistência à corrosão em ambientes encontrados nas operações onshore e offshore e à sua alta resistência mecânica [1]. Aplicações típicas para esses tipos de aço são tubos coletores submarinos, flowlines ou tubos condutores, redes de tubos submarinas e sistemas de processamento topside. Os aços duplex têm sido também amplamente utilizados em muitas áreas além da petroquímica, como na indústria de papel e celulose.No entanto, devido ao teor de níquel (5% -7%) e molibdênio (cerca de 3%) requerido em sua composição, o aço inoxidável duplex tem um alto custo de produção e por apresentar uma solidificação iniciada como ferrita, a soldabilidade dos aços duplex é inferior à dos aços austeníticos, sendo necessário um controle rigoroso de composição química e ciclo térmico de soldagem.

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“…It is seen from Figure 6 that the cathodic currents decreased towards the corrosion current density (j Corr ) with increasing the applied potential towards the less negative values. The cathodic reaction at this condition has been reported to the evolution of hydrogen as per the following equation [18,19,22],…”

Section: Cyclic Potentiodynamic Polarizationmentioning

confidence: 99%

“…We have been using chronoamperometric current-time at constant anodic potential experiments to shed more light into whether pitting corrosion occurs for metals and alloys in aggressive media [18][19][20][21][22]. The applied potential value is usually chosen from the anodic polarization branch.…”

Section: Chronoamperometric Current-time Measurementsmentioning

confidence: 99%

Effect of Annealing Temperature on the Corrosion Protection of Hot Swaged Ti-54M Alloy in 2 M HCl Pickling Solutions

Sherif

El‐Danaf

Abdo

et al. 2017

Metals

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Abstract:The corrosion of Ti-54M titanium alloy processed by hot rotary swaging and post-annealed to yield different grain sizes, in 2 M HCl solutions is reported. Two annealing temperatures of 800 • C and 940 • C, followed by air cooling and furnace cooling were used to give homogeneous grain structures of 1.5 and 5 µm, respectively. It has been found that annealing the alloy at 800 • C decreased the corrosion of the alloy, with respect to the hot swaged condition, through increasing its corrosion resistance and decreasing the corrosion current and corrosion rate. Increasing the annealing temperature to 940 • C further decreased the corrosion of the alloy.

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Influence of nickel additions on the corrosion behaviour of low nitrogen 22% Cr series duplex stainless steels

Cited by 168 publications

References 27 publications

Time-dependent in situ measurement of atmospheric corrosion rates of duplex stainless steel wires

Time-dependent in situ measurement of atmospheric corrosion rates of duplex stainless steel wires

Avaliação da soldagem multipasse de chapas espessas de aços inoxidáveis lean duplex UNS S32304 soldadas pelos processos SMAW, GMAW e FCAW -: resistência à corrosão

Effect of Annealing Temperature on the Corrosion Protection of Hot Swaged Ti-54M Alloy in 2 M HCl Pickling Solutions

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