Use of EPR test to study the degree of sensitization in resistance spot welding joints of AISI 304 austenitic stainless steel

Tiedra, Pilar De; Martín, Óscar; López, M.; Blanco, Manuel San Juan

doi:10.1016/j.corsci.2011.01.036

Cited by 36 publications

(22 citation statements)

References 44 publications

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“…Electrochemical potentiokinetic reactivation (EPR) and double loop electrochemical potentiokinetic reactivation (DLEPR) are quasi non-destructive tests which are much quicker, more sensitive and more accurate than the conventional corrosion tests and that have been primarily used to assess the degree of sensitization in austenitic stainless steels [14,15]; nevertheless, as pointed out by Prohaska et al [16], they can also provide information on the general corrosion behaviour and how this may be affected by microstructural changes. Therefore, EPR and DLEPR techniques were used to assess the effect of γ′ and η phases on the current density through the passive layer.…”

Section: Introductionmentioning

confidence: 98%

Study of influence of gamma prime and eta phases on corrosion behaviour of A286 superalloy by using electrochemical potentiokinetic techniques

2015

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Section: Introductionmentioning

confidence: 98%

Study of influence of gamma prime and eta phases on corrosion behaviour of A286 superalloy by using electrochemical potentiokinetic techniques

2015

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“…Figure c and d shows that, for CW S32205 and HW S2205, austenite dissolves and ferrite remains unattacked at higher polarizations inside the activation region. From the present experiments, the relationship between the double structure of the peak and notches as has been suggested by other authors can be discarded .…”

Section: Resultsmentioning

confidence: 58%

Selective corrosion of duplex stainless steel bars in acid. Part 2: Effect of the surface strain and numerical analysis

Bautista

Alvarez

Velasco

2014

Materials & Corrosion

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In the second part of this study, the effect of the strain level on the selective corrosion of the phases comprised in four different heavily strained duplex stainless steel (DSS) bars is analyzed. The corrosion behavior of the surface of bars with variable strain levels is analyzed and compared to the results of the less strained core of the same bars. For lean DSS bars (UNS S32304 and S32001 grades), an increase on the corrosion rate caused by the strains has been detected for the surface. For these DSS without Mo, ferrite has proved to be more sensitive to decrease on the corrosion resistance caused by the strain than austenite. In these cases, the strains expand the region of active corrosion toward higher potentials. On the other hand, when the grains are heavily strained parallel to the surface, if the most corrosion resistant phase has good corrosion behavior in the medium (UNS S32205 grades), the corrosion rate can be effectively slowed down, in spite of the microstructural defects.

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“…Austenitic stainless steels are extensively used in many fields of manufacturing because of their superior mechanical and functional properties such as high ductility, high strength, acceptable weldability and superb resistance against corrosion [1][2][3][4][5][6][7][8]. Additionally, they have an exceptional toughness and a high heat resistance, wherefore they can successfully be used from cryogenic to red-hot temperatures [9].…”

Section: Introductionmentioning

confidence: 99%

Investigations on small-scaled welded structures of austenitic stainless steel

Reisgen¹,

Willms²,

Schäfer³

et al. 2020

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The present study describes the process characteristics of the Cold-Metal-Transfer (CMT) Pin-Welding by welding structures on austenitic stainless steel (AISI 304) and characterizes the corresponding mechanical properties. Pin-Welding technology enables the possibility of welding small-scaled structures out of the welding wire. The mechanical properties and microstructures of the welded structures were investigated on different pin formations. Experimental samples extracted from the welded structure were subjected to tensile and hardness tests and microstructural examinations. Tensile test results were obtained lower than the welding wire owing to the process heat input, but both presented similar proportional results. The structures hardness formed out of wire diameter of 0.8 mm and 1.2 mm was obtained in an interval between 200-250 HV. Because the base metal has nearly similar hardness values, the whole structure exhibits a stable hardness distribution after the welding process.

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Use of EPR test to study the degree of sensitization in resistance spot welding joints of AISI 304 austenitic stainless steel

Cited by 36 publications

References 44 publications

Study of influence of gamma prime and eta phases on corrosion behaviour of A286 superalloy by using electrochemical potentiokinetic techniques

Study of influence of gamma prime and eta phases on corrosion behaviour of A286 superalloy by using electrochemical potentiokinetic techniques

Selective corrosion of duplex stainless steel bars in acid. Part 2: Effect of the surface strain and numerical analysis

Investigations on small-scaled welded structures of austenitic stainless steel

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