Corrosion and stress corrosion cracking behavior of 316L austenitic stainless steel in high H2S–CO2–Cl− environment

Ding, Jerry; Zhang, Lei; Li, Dapeng; Lu, Minxu; Xue, Junmin; Zhong, Wen

doi:10.1007/s10853-013-7168-1

Cited by 30 publications

(12 citation statements)

References 7 publications

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“…Austenitic Ni-Cr-Mo-Fe alloys have been used in oil and gas wells to obtain high corrosion resistance in H 2 S-Cl -environments and various Ni-Cr-Mo-Fe alloys have been developed [1][2][3][4][5][6][7][8][9][10]. Effects of alloyed elements on localized corrosion resistance such as pitting corrosion and stress corrosion cracking (SCC) of Ni-Cr-Mo-Fe alloys in H 2 S-Cl -environments have been investigated and some effective elements have been determined: Ni, Cr, and Mo [11][12][13][14][15][16][17][18][19][20]. In particular, the alloyed molybdenum increases remarkably the corrosion resistance of Ni-Cr-Mo-Fe alloys in H 2 S-Cl -environments.…”

Section: Introductionmentioning

confidence: 99%

Role of alloyed molybdenum on corrosion resistance of austenitic Ni–Cr–Mo–Fe alloys in H 2 S–Cl – environments

et al. 2015

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Section: Introductionmentioning

confidence: 99%

Role of alloyed molybdenum on corrosion resistance of austenitic Ni–Cr–Mo–Fe alloys in H 2 S–Cl – environments

et al. 2015

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“…Para remoção do catalisador básico é necessário uma etapa de neutralização, que é feita com ácido clorídrico diluído [5]. Porém o uso de HCl leva a formação de glicerina com certo teor de cloreto, o que favorece a corrosão por pite nos pontos de dosagem dos aços da linha de produção [8][9][10]. A corrosão por pite é uma das formas mais comuns e perigosas de corrosão localizada e ocorre, geralmente, em ambientes agressivos, como em soluções de brometo e cloreto [9,11].…”

Section: Introductionunclassified

Resistência À Corrosão Dos Aços Aisi 317l E Saf 2304 Em Meio De Glicerina Acidificada Contendo Cloretos

Menezes¹,

Lins²,

Castro³

2019

ABM Proceedings

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ResumoO biodiesel, obtido a partir de um éster e um álcool na presença de um catalisador, é produzido pela reação de transesterificação e tem como coproduto a glicerina. A produção de biodiesel da Petrobras Biocombustível tem, em uma de suas etapas, a lavagem dos produtos para remoção do catalisador básico, metilato de sódio, por meio da reação de neutralização com ácido clorídrico. Devido a essa prática, a glicerina obtida é acidificada e contêm resíduos de cloretos, o que leva à corrosão localizada dos aços utilizados em determinados pontos do processo de produção. Dessa forma, o presente trabalho avaliou a resistência à corrosão do aço austenítico 317L e do aço lean duplex 2304, em meio de glicerina acidificada contendo cloretos. Todas as medidas foram conduzidas a 64ºC, visando simular as condições de operação da empresa. Para o estudo em questão, utilizou-se as técnicas de potencial de circuito aberto (OCP), polarização potenciodinâmica e microscopia eletrônica de varredura (MEV). As análises mostraram que o aço AISI 317L obteve menor potencial de pite que o SAF 2304, logo foi menos resistente. Por meio do MEV foi possível confirmar a presença dos pites, sendo que as cavidades presentes no aço AISI 317L foram mais numerosas e profundas que as observadas no aço SAF 2304. Palavras-chave: Glicerina; Cloreto; Aços inoxidáveis; Polarização potenciodinâmica. CORROSION RESISTANCE OF AISI 317L AND SAF 2304 STEEL IN MEDIUM OF GLYCERIN ACIDIFIED CONTAINING CHLORIDE AbstractBiodiesel and glycerin, obtained from ester and alcohol in presence of a catalyst, are produced by the transesterification reaction. The production of biodiesel by Petrobras Biocombustível has, in one of its stages, the washing of products to remove the basic catalyst, sodium methylate, through the neutralization reaction with hydrochloric acid. Because of this practice, the glycerin obtained is acidified and contain residues of chloride, which leads to localized corrosion of the steel used in certain points of the manufacturing process. Austenitic and lean duplex stainless steels such as AISI 317L and SAF2304 are alternative materials of equipment of biodiesel plant which is in contact with acidified glycerin containing chloride. This work aims to evaluate the pitting corrosion resistance of the AISI 317L stainless steel and the SAF 2304 lean duplex stainless steel in solution of acidified glycerin containing chloride at a service temperature of 337K. For the present study, was used the open circuit potential techniques (OCP), potentiodynamic polarization and scanning electron microscopy (SEM). Analyses showed that steel AISI 317L had lower pitting potential that the SAF in 2304, therefore was less resistant. By SEM it was possible to confirm the presence of pitting in the steels. The cavities present in the steel AISI 317L were more numerous and deeper than those observed in the steel SAF 2304.

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“…[3][4][5][6] Ding et al investigated the behavior of corrosion and SCC of austenitic stainless steels in high H2S-CO2-Clenvironments. [7] Their results showed that high H2S-CO2 pressure can accelerate anodic dissolution process, deteriorate passive films, and aggravate SCC sensitivity. The corrosion rate of steel in wet H2S is significantly higher than that in dry H2S environment.…”

Section: Introduction Introduction Introduction Introductionmentioning

confidence: 99%

“…[9] Besides, low pH can promote both cathodic and anodic actions on stainless steel and facilitate passive film breakdown. [7] In addition to the corrosion of H2S, CO2 and Cl -, saturated natural gas in pipelines will have a free liquid phase due to the effect of pressure drop, and a certain amount of solid impurities will be mixed in the pipeline, resulting in three-phase coexistence of gas, solid, and liquid. Erosion-corrosion is faster than corrosion alone and is a more hazardous local corrosion.…”

Section: Introduction Introduction Introduction Introductionmentioning

confidence: 99%

The Effect of Liquid Nitriding on the Corrosion Resistance of AISI 304 Austenitic Stainless Steel in H2S Environments

Wang

Jin³

et al. 2018

Metall Mater Trans A

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AISI 304 austenitic stainless steel was low-temperature liquid nitrided in a molten salt bath at 703 K for 8 h, which produced a 3-layered structure consisting of a top oxide layer, an intermediate nitrogen-rich layer and a bottom carbon-rich layer. The effect of nitriding on its corrosion resistance was investigated in a H2S environment. The corrosion rate of the untreated sample is about 3.3 times that of the nitrided sample after H2S corrosion. Corrosion pits can be clearly observed on the surface of the untreated sample, while the nitrided sample surface remained relatively intact. Both the oxide layer and the nitrogen-rich layer can help reduce the hydrogen permeation, which is beneficial for combating hydrogen embrittlement. The corrosion products mainly consisted of oxides, hydroxides, and sulfates. The nitrided layers can serve as a barrier to corrosion, thus preventing the corrosion of the substrate material. Active nitrogen in the nitrided layer reacts with H ions to form NH4 + , which effectively prevents further acidification of the local area and inhibits the occurrence of pitting corrosion and the dissolution rate of the metal in the etching hole, thus improving the local corrosion resistance of the stainless steel.

show abstract

Corrosion and stress corrosion cracking behavior of 316L austenitic stainless steel in high H2S–CO2–Cl− environment

Cited by 30 publications

References 7 publications

Role of alloyed molybdenum on corrosion resistance of austenitic Ni–Cr–Mo–Fe alloys in H 2 S–Cl – environments

Role of alloyed molybdenum on corrosion resistance of austenitic Ni–Cr–Mo–Fe alloys in H 2 S–Cl – environments

Resistência À Corrosão Dos Aços Aisi 317l E Saf 2304 Em Meio De Glicerina Acidificada Contendo Cloretos

The Effect of Liquid Nitriding on the Corrosion Resistance of AISI 304 Austenitic Stainless Steel in H2S Environments

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