Microstructure and Mechanical Behavior in Dissimilar SAF 2205/API X52 Welded Pipes

Belkessa, Brahim; Miroud, Djamel; Ouali, Naima; Cheniti, Billel

doi:10.1007/s40195-016-0428-8

Cited by 30 publications

(12 citation statements)

References 17 publications

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“…Všechny vzorky byly po korozní expozici podrobeny metalografické analýze za účelem charakterizace typu a stupně korozního poškození. Vyhodnocení experimentu bylo zaměřeno na oblast svarového spoje a jeho okolí, kde jsme očekávali největší míru korozního poškození [5,7].…”

Section: Provedená Měřeníunclassified

Impact of corrosion product removal to depth of corrosion damage in weldment joint

Hodač

Fulín

2019

Koroze a Ochrana Materialu

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Corrosion flaws in pipelines can caused severe financial losses and also can be dangerous for people. One of the most frequently damaged parts are dissimilar pipe welds. We would like to understand how corrosion process reacts on corrosion product removal. Outputs from experiment will be used for production of test specimens. For testing we chose standard dissimilar weldment used in Czech power plants. It is joint with 08Ch18N10T and 22K (GOST) steel. Joint is cut to 24 same specimens. There are exposed to flowing water solution of 5% NaCl. Half of the specimens are regularly mechanically cleaned. The joint is metallographically observed and parts with and without corrosion products are compared. Water salt solution increased pH from 7,25 to 7,86 during 31 days test and conductivity varies around 74 mS cm−1. Metallographic observation indicates that corrosion under corrosion products layer is locally speed up and causes pitting corrosion. Cleaned specimens indicate plane corrosion with lower depth. These results indicate that slag in pipeline could locally speed up corrosion depth penetration. On the other hand, solutions with abrasive particles (which can wipe out the corrosion product) will probably facilitate plane corrosion damage on pipeline walls. This test brings us another knowledge, how to simulate realistic corrosion damage for production of NDT qualification test pieces.

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Section: Provedená Měřeníunclassified

Impact of corrosion product removal to depth of corrosion damage in weldment joint

Hodač

Fulín

2019

Koroze a Ochrana Materialu

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“…2,3 Issues like a mechanical mismatch, carbon migration, metallurgical deterioration, and residual stress development pose a severe challenge to the structural integrity of dissimilar welds. [4][5][6] The selection of suitable welding consumable plays an essential role in ensuring sound weld performance and longlasting performance. In the shielded metal arc welding process, the electrode coating plays multiple roles for ensuring sound weld fabrication.…”

Section: Introductionmentioning

confidence: 99%

High-temperature wettability study of mineral waste added CaO–CaF₂–SiO₂ and CaO–TiO₂–SiO₂-based electrode coating for offshore welds

Khan

Kumar

Chhibber

2020

Proceedings of the Institution of Mechanical Engineers, Part L:

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This paper investigates the high-temperature wettability property of the mineral waste red ochre added CaO–CaF2–SiO2 and CaO–TiO2–SiO2-based electrode coating mixture for offshore welding. The extreme vertices design method was applied to formulate 21 coating compositions. The pellets made from developed electrode coating compositions were exposed to a high temperature of 1250℃ on the substrate of super duplex stainless steel of 2507 grade. The molten flux has been characterized for contact angle, surface tension, adhesion energy and spreadability. The regression analysis has been used to estimate the effect of individual components and their interactions on the wettability property parameters. The developed regression models have been optimized using multiresponse optimization to achieve optimum flux composition. Structural analysis of flux mixture has been done using X-ray diffraction and Fourier transformation spectroscopy.

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“…De modo geral, este tipo de soldagem é mais desafiador do que a união tradicional de materiais que Soldagem & Inspeção. 2019;24:e2404 2/13 possuem composição química ou comportamento semelhante, dado que, esse tipo de junção, é mais sensível às diferenças nas composições químicas, propriedades físicas e mecânicas dos metais de base [2]. A soldagem dissimilar é particularmente aplicada na união entre diferentes tipos de aços inoxidáveis e entre aços inoxidáveis e aços de alta resistência e baixa liga, que são largamente utilizados em vasos de pressão, caldeiras, trocadores de calor e em tubulações de plantas petroquímicas [3,4].…”

Section: Introductionunclassified

Avaliação Microestrutural e Resistência à Corrosão de uma Junta Dissimilar entre um Aço de Alta Resistência e Baixa Liga e Aço um Inoxidável Duplex

et al. 2019

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Resumo A união entre materiais dissimilares tem sido amplamente aplicada na indústria de petróleo e gás. Em geral, este tipo de soldagem é mais sensível às diferenças de composição química existente entre os metais envolvidos. Diante dessa perspectiva, este trabalho tem por objetivo avaliar, por união autógena, a microestrutura de uma junta soldada entre um aço de alta resistência e baixa liga da classe API 5L X80 e um aço inoxidável duplex UNS S32304. Além disso, estudou-se o comportamento quanto à resistência à corrosão em uma solução simuladora de água do mar. A microestrutura e composição da junta soldada foram avaliadas por microscopia ótica e eletrônica, espectrometria de energia dispersiva (EDS). A resistência à corrosão foi estudada por polarização potenciodinâmica anódica e por ensaios de espectroscopia de impedância eletroquímica. As juntas soldadas apresentaram uma microestrutura que se difere em morfologia de ambos os metais de base, além disso, notou-se a migração de cromo e níquel do duplex para esta região que apresentou uma resistência à corrosão ligeiramente superior ao API. Desta forma, podemos concluir que as propriedades da junta dissimilar são compatíveis com as aplicações, sendo possível sua utilização usufruindo-se das vantagens da soldagem dissimilar.

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Microstructure and Mechanical Behavior in Dissimilar SAF 2205/API X52 Welded Pipes

Cited by 30 publications

References 17 publications

Impact of corrosion product removal to depth of corrosion damage in weldment joint

Impact of corrosion product removal to depth of corrosion damage in weldment joint

High-temperature wettability study of mineral waste added CaO–CaF₂–SiO₂ and CaO–TiO₂–SiO₂-based electrode coating for offshore welds

Avaliação Microestrutural e Resistência à Corrosão de uma Junta Dissimilar entre um Aço de Alta Resistência e Baixa Liga e Aço um Inoxidável Duplex

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Microstructure and Mechanical Behavior in Dissimilar SAF 2205/API X52 Welded Pipes

Cited by 30 publications

References 17 publications

Impact of corrosion product removal to depth of corrosion damage in weldment joint

Impact of corrosion product removal to depth of corrosion damage in weldment joint

High-temperature wettability study of mineral waste added CaO–CaF2–SiO2 and CaO–TiO2–SiO2-based electrode coating for offshore welds

Avaliação Microestrutural e Resistência à Corrosão de uma Junta Dissimilar entre um Aço de Alta Resistência e Baixa Liga e Aço um Inoxidável Duplex

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High-temperature wettability study of mineral waste added CaO–CaF₂–SiO₂ and CaO–TiO₂–SiO₂-based electrode coating for offshore welds