Galvanic Couple Posted on 13th November 20151st September 2020 by ThePD (The Project Definition) A Galvanic Couple is a pair of dissimilar metal substances in contact with an electrolyte. Click to share on Twitter (Opens in new window)Click to share on Facebook (Opens in new window)Click to share on LinkedIn (Opens in new window) Related Posted in Technology and tagged corrosion. ThePD (The Project Definition) ThePD has been developing the Preferred Project Definitions based on the actual project execution and operation experiences and knowledge with the Project Language, and sharing with you daily basis.