Aluminum Corner Element Insulating Washers Prevent Galvanic Corrosion

The patent introduces insulating washers made of plastic or other insulating material as intermediaries between the steel tubular elements and aluminum profiles. These washers prevent direct electrical contact between the dissimilar metals, thereby eliminating the galvanic corrosion pathway while maintaining the structural connection. The insulating washer acts as a mediator that allows mechanical load transfer without enabling electrochemical degradation.

The insulating washer serves as a mediator that simplifies assembly by providing a pre-formed interface between dissimilar metals, eliminating the need for complex corrosion prevention measures during assembly. For disassembly, the insulating washer prevents corrosion-induced jamming, allowing bolts to be removed cleanly without seizing. The mediator thus improves both assembly and disassembly operations.

The insulating washer is designed to perform multiple functions simultaneously: it provides electrical insulation to prevent galvanic corrosion, serves as a mechanical bearing surface for the bolt, distributes load across the contact interface, and prevents direct metal-to-metal contact. By consolidating these functions into a single component, the patent minimizes the increase in device complexity while achieving reliable corrosion prevention.

The insulating washer acts as a protective mediator between the aluminum profile and steel tubular element, preventing the electrochemical reaction that would cause corrosion of the aluminum. This allows the lightweight aluminum structure to maintain its corrosion resistance by eliminating the galvanic couple, while preserving the weight advantage of using aluminum instead of steel for the goal framework.