galvanic couple


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galvanic couple

[gal′van·ik ′kəp·əl]
(electricity)
A pair of unlike substances, such as metals, which generate a voltage when brought in contact with an electrolyte.
References in periodicals archive ?
Titanium alloy implants/prostheses processed under hydrogen-containing environments and under conditions in which galvanic couples or cathodic charging (impressed current) causes hydrogen to be evolved on metal surfaces may cause hydrogen induced cracking (HIC) [36-37] and the impairment of ductility of implant/prostheses permanently and irreversibly.
Therefore, despite the existence of a galvanic couple, the incrustation of copper alloy to the substrate did not impair the paintings performance (groups B and E) in comparison with the systems with surface preparation by steel tools (groups A and D).
This suggests that the potential difference generated by the galvanic couple is greater for the Cu-AA2024-T3 pair than the Cu-Ni-AA2024-T3 pair (Figure 10).