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Independence of EPR and PAP tests performed on resistance spot welding joints

AuthorsAhedo, Virginia; Martín, Óscar; Santos, José Ignacio ; Tiedra Frontaura, Pilar de; Galán, José Manuel
KeywordsPitting potential
Resistance spot welding
Reactivation charge
Electrochemical potentiokinetic reactivation test
Potentiodynamic anodic polarisation test
Maximal information coefficient
Distance correlation
AISI 304 stainless steel
Issue Date2017
PublisherTaylor & Francis
CitationCorrosion Engineering Science and Technology 52: 418- 424 (2017)
AbstractIn the present paper, the possible relationships among the variables of the potentiodynamic anodic polarisation (PAP) test and the electrochemical potentiokinetic reactivation (EPR) test, both performed on resistance spot welding joints of AISI 304 stainless steel, are investigated. Results show that PAP variables are statistically independent from those of EPR, which implies independence between the pitting corrosion behaviour and the degree of sensitisation of the material. Parameters from PAP test are dependent among them, but this association is found noisy since the current density along the passive zone is not exactly constant. The parameters from the EPR test are confirmed as very related, presenting a linear relationship and a high coefficient of determination.
Publisher version (URL)https://doi.org/10.1080/1478422X.2017.1319148
Identifiersdoi: 10.1080/1478422X.2017.1319148
e-issn: 1743-2782
issn: 1478-422X
Appears in Collections:(IMF) Artículos
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