Pitting corrosion failure of an AISI stainless steel pointer rod

Sharma, Pankaj Kumar; Roy, Himadri

doi:10.1016/j.engfailanal.2014.06.001

Cited by 20 publications

(10 citation statements)

References 15 publications

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“…TiC, Ti(C,N) and TiN precipitates have been reported to play a role in the onset of pitting corrosion of the AISI 409 stainless steel 7 . In spite of the critical role of pitting corrosion to the safe operation of stainless steel components [8][9][10] , few studies were devoted to investigate this phenomenon on the AISI 409 grade. Balusamy et al…”

Section: Introductionmentioning

confidence: 99%

Electrochemical Study of the AISI 409 Ferritic Stainless Steel: Passive Film Stability and Pitting Nucleation and Growth

et al. 2017

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The aim of the present work was to study the passive film stability and pitting corrosion behavior of the AISI 409 stainless steel. The electrochemical tests were carried out in 0.1 M NaCl solution at room temperature. The general electrochemical behavior was assessed using electrochemical impedance spectroscopy (EIS) measurements whereas the semiconducting properties of the passive film were evaluated by the Mott-Schottky approach. Pitting corrosion was investigated using potentiodynamic and potentiostatic polarization tests. Surface morphology was examined using confocal laser scanning microscopy and scanning electron microscopy (SEM). Energy dispersive X-ray spectroscopy (EDS) analyses were carried out to identify the composition of precipitates that could act as preferential sites for the onset of pitting corrosion. The results showed that the passive film presents n-type semiconductive behavior. Grain boundaries played an important role as pitting initiation sites for the AISI 409 stainless steel.

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Section: Introductionmentioning

confidence: 99%

Electrochemical Study of the AISI 409 Ferritic Stainless Steel: Passive Film Stability and Pitting Nucleation and Growth

et al. 2017

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“…O carbono é o elemento primordial para a resistência dos aços comuns, pois durante o processo de tratamento térmico é o principal responsável pelo endurecimento do aço através da transformação martensítica. O fósforo e o enxofre em grandes quantidades conferem fragilidade ao aço, porém o enxofre em particular quando ligado ao manganês melhora a usinabilidade e prejudica a resistência a corrosão, pois deixa a peça mais suscetível a corrosão localizada [4]. O silício é utilizado para atenuar a formação de bolhas nos lingotes, mas não atuam diretamente na resistência mecânica do aço, pois encontram-se em pequenas quantidades, além disso esse elemento é utilizado na siderurgia como um acalmador, em outras palavras, promove a remoção do excesso de gases que são abundantes durante o refino primário do aço e que podem provocar porosidades durante a etapa de solidificação dos lingotes, além disso, promove a inibição da formação de aluminatos que podem promover a obstrução dos tubos utilizados para ecoar o metal liquido durante a solidificação.…”

Section: Resultsunclassified

Estudo Da Temperabilidade Do Aço Sae 1040

Silva¹,

Jabour²,

Santos³

et al. 2017

Anais Do Enemet - Encontro Nacional De Estudantes De Engenharia Metalúrgica, De Materiais E De Minas

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ResumoEste trabalho tem o propósito de avaliar a temperabilidade de um aço SAE 1040 através da utilização do ensaio Jominy e posteriormente promover tratamentos térmicos, gerando nos corpos de prova condições de arrefecimento diferenciadas para avaliar a influência da severidade de têmpera da salmoura e óleo. A curva de ensaio Jominy gerada apresentou um comportamento coerente para um aço com médio teor carbono. Já os tratamentos térmicos que foram realizados posteriormente revelaram que o meio que gera o maior acréscimo nas propriedades mecânicas é o resfriamento em salmoura, haja vista que os corpos de prova submetidos a este resfriamento apresentaram o maior de dureza. Palavras-chave: Tratamento térmico; Têmpera; Ensaio Jominy. STUDY OF SAE 1040 STEEL HARDENABILITY AbstractThis work aims to evaluate the hardenability of a SAE 1040 steel by using the Jominy test and subsequently promote heat treatments, generating the test bodies, different cooling conditions to evaluate the influence of tempering severity of water, brine and oil. The Jominy test curve generated presented a consistent behavior for a steel with medium carbon content. Have any heat treatments were performed later revealed that the medium that generates the greatest increase in mechanical properties is cooling in brine , given that the samples submitted to this cooling showed the highest hardness.

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“…Stainless steels are prone to localized corrosion in contact with chloride-containing solutions [1][2][3]. The stability of the naturally formed passive film accounts for its corrosion resistance in a variety of environments [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Investigation on the Relationship between the Surface Chemistry and the Corrosion Resistance of Electrochemically Nitrided AISI 304 Stainless Steel

Rocha

Pereira

Oliveira

et al. 2019

International Journal of Corrosion

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The relationship between the surface chemistry and the corrosion resistance of electrochemically nitrided AISI 304 stainless steel samples has been investigated. The nitriding treatment was carried out in HNO3 0.1 M and HNO3 0.1 M + KNO3 0.5 M at room temperature. Samples were subjected to the nitriding procedure for 30 minutes under a cathodic potential of -0.7 VAg/AgCl. The chemical composition of the nitrided layers was assessed by X-ray photoelectron spectroscopy (XPS). Depth profiles of the main elements present in the nitrided layers were also obtained by XPS by etching them with argon ions. The corrosion behavior of the nitrided samples was evaluated by potentiodynamic polarization. The results showed that the nitrided layers consisted of a mixture of chromium nitrides, chromium oxides, iron oxides/oxyhydroxides, and nickel oxide. The best corrosion resistance was obtained by electrochemical nitriding in the HNO3 0.1 M + KNO3 0.5 M solution. This result could be correlated with the composition and thickness of the nitrided layer.

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Pitting corrosion failure of an AISI stainless steel pointer rod

Cited by 20 publications

References 15 publications

Electrochemical Study of the AISI 409 Ferritic Stainless Steel: Passive Film Stability and Pitting Nucleation and Growth

Electrochemical Study of the AISI 409 Ferritic Stainless Steel: Passive Film Stability and Pitting Nucleation and Growth

Estudo Da Temperabilidade Do Aço Sae 1040

Investigation on the Relationship between the Surface Chemistry and the Corrosion Resistance of Electrochemically Nitrided AISI 304 Stainless Steel

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