Synergism of alloying elements and pitting corrosion resistance of stainless steels

Lu, Yuning; Ives, M. B.; Clayton, Clive R.

doi:10.1016/0010-938x(93)90137-6

Cited by 97 publications

(42 citation statements)

References 14 publications

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“…0.45 wt.%), which is usually described to be responsible for improving the localised corrosion resistance of DSS microstructures. 55,56 The expansion of the area covered by surface corrosion indicates that the corrosion process in 2202 DSS can even expand to larger areas without the need for large net anodic current densities. Usually, large net anodic current densities are required to breakdown the passive layer of stainless steels, which is facilitated by large cathode-to-anode ratios under thin-film electrolytes and large cathodic kinetics due to abundant atmospheric oxygen reduction.…”

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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“…The lower the passive current, the more effective is the passive fi lm as a kinetic barrier against corrosion reactions, and the lower will be the corrosion rate of the metal in the passive condition. The higher concentration of molybdenum or even the synergistic effect of nitrogen and molybdenum (Levey and Van Bennekom, 1995;Jargelius-Pettersson, 1999;Bandy and Cahoon, 1977;Lu, Ives, Clayton, 1993) through the co-segregation and the formation of a surface array which suppresses dissolution could be responsible for a passive fi lm that is more effi cient as a kinetic barrier in the ISO 5832-9 steel. The reduction in the passive current density can be attributed to the mechanism of nitrogen negativelycharged enrichment beneath the passive film.…”

Section: Resultsmentioning

confidence: 99%

“…According to the same author, rapid repassivation may be favored by the effect of nitrogen in buffering pH by the ammonium ions formation, according to reaction (2). In addition, some authors suggest the formation of corrosion resistant Cr-or Mo-nitrides in the pit bottom, suppressing the growth of the pit (Levey and Van Bennekom, 1995;Jargelius-Pettersson, 1996;Lu, Ives, Clayton, 1993).…”

Section: Resultsmentioning

confidence: 99%

Electrochemical behavior of two austenitic stainless steel biomaterials

Giordano

Alonso-Falleiros

Ferreira

et al. 2010

Rem: Rev. Esc. Minas

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ResumoO presente trabalho avaliou a resistência à corrosão localizada de dois aços inoxidáveis austeníticos utilizados na fabricação de implantes ortopédicos: o aço ASTM F138, material metálico atualmente mais utilizado em aplicações ortopédicas e o aço ISO 5832-9, aço com adição de nióbio e nitrogênio e que vem sendo apontado como uma alternativa para a substituição do aço F138, para aplicações mais severas de carregamento e tempo de permanência no interior do corpo humano. Ensaios de polarização mostraram que o aço ISO 5832-9 apresenta resistência à corrosão localizada muito superior à do aço F138. O potencial crítico de pite do aço ISO 5832-9 não foi observado na curva de polarização cíclica até o potencial de transpassivação do material. O ensaio potenciostático de corrosão por risco confi rmou a superioridade do aço ISO 5832-9. Observou-se a reconstituição do fi lme passivo danifi cado mecanicamente, mesmo em potenciais tão elevados como 800 mV SCE. Análises por microscopia eletrônica de varredura confi rmaram a presença de pites de corrosão de crescimento estável, na superfície da amostra de aço F 138, e a ausência desses pites, na amostra do aço ISO 5832-9. A maior resistência à corrosão localizada do aço ISO 5832-9 é, principalmente, atribuída ao aumento da estabilidade do fi lme passivo, sendo favorecida pela presença do nitrogênio em solução sólida intersticial, na austenita desse aço. Palavras

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“…The addition of small amounts of nitrogen can enhance the pitting resistance and passivation characteristics [12]. A synergistic influence of nitrogen and molybdenum on pitting corrosion resistance has noticed and enrichment of molybdenum and nitrogen on the surface at a level of at least seven times that the original concentration of nitrogen present in the alloy [14]. They have proved this enrichment of nitrogen and molybdenum at the interface to be the predominant factor for preventing further dissolution substrate consequent to the destruction of the passive film.…”

Section: Methodsmentioning

confidence: 99%

Electrochemical corrosion behavior of alloy 31 using dynamic electrochemical impedance spectroscopy

Srinivasan

Rajendran

2010

Trans. Mat. Res. Soc. Japan

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Potentiodynamic anodic polarisation and Dynamic Electrochemical Impedance Spectroscopic (DEIS) measurements were carried out on type 316L stainless steel (SS) and alloy 31 in natural sea water in order to assess the pitting corrosion resistance. DEIS measurements were performed over a wide range of potentials covering the corrosion potential, passive region, breakdown region and dissolution region. It was shown that the impedance measurements in potentiodynamic conditions allow instantaneous investigation of changes in passive layer with potential. The impedance spectra of various potential regions were also discussed. From the above studies, the pitting corrosion resistance of the alloys 31 was higher than 316L SS; due to the higher contents of nitrogen, chromium and molybdenum.

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Synergism of alloying elements and pitting corrosion resistance of stainless steels

Cited by 97 publications

References 14 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

Electrochemical behavior of two austenitic stainless steel biomaterials

Electrochemical corrosion behavior of alloy 31 using dynamic electrochemical impedance spectroscopy

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