Flange Joint Galvanic Decoupling to Reduce Hot Water Tank Corrosion

The patent introduces a galvanically inert intermediary material (such as plastic or rubber) that is inserted between the heating flange and the storage container. This intermediary material acts as a mediator that prevents direct contact between dissimilar metals, thereby eliminating the electrochemical corrosion pathway while still allowing the different materials to be used for their respective functional optimizations.

The patent combines the sealing function and the galvanic isolation function into a single integrated sealing element. This sealing element simultaneously provides the necessary seal between the heating flange and storage container while also serving as the galvanically inert barrier that prevents corrosion. By merging these two functions into one component, the design avoids the need for separate insulating elements, thereby maintaining assembly simplicity while achieving corrosion protection.

The patent designs the closure body to serve multiple functions simultaneously: it provides the sealing function, acts as the galvanically inert barrier for corrosion protection, and serves as the mounting surface for the heating element and other components. By making the closure body a multi-functional universal component, the design achieves corrosion resistance through galvanic decoupling without significantly increasing structural complexity, as the same component performs multiple roles that would otherwise require separate parts.