Non-Destructive Evaluation of the AISI 304 Stainless Steel Susceptibility to Intergranular Corrosion by Electrical Conductivity Measurements

Radojković, Bojana M.; Jegdić, Bore V.; Marunkić, Dunja D.; Pejić, Jovanka N.; Simović, Anđela R.; Ćosović, Vladan R.; Bajat, Jelena B.

doi:10.1007/s12540-023-01536-1

Met. Mater. Int.

2023

DOI: 10.1007/s12540-023-01536-1

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Non-Destructive Evaluation of the AISI 304 Stainless Steel Susceptibility to Intergranular Corrosion by Electrical Conductivity Measurements

Bojana M. Radojković,

Bore V. Jegdić,

Dunja D. Marunkić

et al.

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2024

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Cited by 3 publications

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Influence of precipitation on the intergranular corrosion sensitivity of aged Alloy 31 using a modified electrochemical potentiokinetic reactivation method

Ouyang,

Pan,

Wang

et al. 2024

Corrosion Science

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Influence of precipitation on the intergranular corrosion sensitivity of aged Alloy 31 using a modified electrochemical potentiokinetic reactivation method

Ouyang,

Pan,

Wang

et al. 2024

Corrosion Science

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Passive film properties and corrosion resistance of AISI 304L stainless steel

Radojković,

Jegdić,

Pejić

et al. 2024

Corrosion Engineering, Science and Technology: The Internationa

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The passive film properties and resistance to general and different types of localised corrosion of the AISI 304L stainless steel were analysed. The properties and behaviour of two microstructural states, the as-received and sensitisation-annealed, are comparatively analysed by electrochemical methods (linear sweep voltammetry-LSV, Mott–Schottky, electrochemical impedance spectroscopy-EIS and electrochemical potentiokinetic reactivation method with double loop-DL-EPR) and surface analytical techniques (scanning electron microscope-SEM/EDS and X-ray photoelectron spectroscopy-XPS). XPS analysis showed the presence of Fe2+, Fe3+ and Cr3+ oxides and hydroxides, and a higher Cr:Fe ratio in the passive layer for the sensitised than as-received specimens. Sensitised stainless steel shows a lower defect density and higher protective stability of the passive layer, and a higher resistance to general corrosion, than the as-received one. However, during LSV measurements, at higher electrode potentials, sensitised stainless steel showed lower passive film stability, due to the metastable pits formation and transformation in the stable pits.

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The Influence of Alloy Composition on Microstructure and Performance of Mixed-Smelting Alloy and Weld Metal

Ge,

Hu,

et al. 2024

Materials

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In the present work, the Q345B low-alloy steel with different contents and ER309L stainless steel were melted together to obtain new alloys. The aim was to design the composition of weld metal (Q345B low-alloy steel as the base material and ER309L welding wire as the filler material) and improve the corrosion resistance of the weld metal. During the welding process, the composition of the weld metal was controlled to match the new alloys by changing the welding heat input. A relationship curve between fusion ration and welding heat input was obtained. The research focused on analyzing the effect of mixed-smelting ratio between Q345B and ER309L and welding heat input on the microscopic structure and corrosion performance of the prepared samples. The results show that the melted alloys containing 20% to 30% Q345B consist of a ferrite (δ) phase and austenite (A) phase, the samples containing 45% to 50% Q345B consist of a martensite (M) phase and austenite (A) phase, and the sample containing 40% Q345B consists of a martensite (M) phase, ferrite (δ) phase, and austenite (A) phase. As the mixed-smelting ratio of Q345B/ER309L increased, the corrosion resistance of samples decreased gradually. For the weld metal, the fusion ration between Q345B base material and ER309L welding wire increases with the welding heat input. When the heat input changed from 0.645 kJ/mm to 2.860 kJ/mm, the composition of the weld metal was consistent with the melted alloys containing 20–45% Q345B. The microstructure and corrosion resistance of the weld metal could be designed by the melting means, which has important guiding significance for engineering applications.

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Non-Destructive Evaluation of the AISI 304 Stainless Steel Susceptibility to Intergranular Corrosion by Electrical Conductivity Measurements

Cited by 3 publications

References 56 publications

Influence of precipitation on the intergranular corrosion sensitivity of aged Alloy 31 using a modified electrochemical potentiokinetic reactivation method

Influence of precipitation on the intergranular corrosion sensitivity of aged Alloy 31 using a modified electrochemical potentiokinetic reactivation method

Passive film properties and corrosion resistance of AISI 304L stainless steel

The Influence of Alloy Composition on Microstructure and Performance of Mixed-Smelting Alloy and Weld Metal

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