Automotive door hinges are exposed to the elements, creating risk for corrosion. This white paper documents two great solutions which allow for superior corrosion resistance, without further issues.
For hinge applications that need a high level of protection against corrosion, Saint-Gobain have created a simple solution. Using a NORGLIDE® Hinge Bearing that contains no bronze and has a steel backing layer that is clad in aluminium creates a hinge assembly that can survive salt spray chamber testing for over 1000 hours with no red rust. This means that the hinge torque will stay within the typical OEM torque specifications for the life of the vehicle.
Another benefit for hinges offered by SAINT-GOBAIN is a NORGLIDE® Bearing that provides a more efficient e-painting process. To reduce e-painting time, moving parts can be assembled and painted together, as long as the hinges between the moving parts are able to pass current from one part to another. However, if the hinge is fully conductive, then it will be fully painted over, then the paint will bridge across the mating components, creating a paint-bridge. When the parts are moved for the first time the paint-bridges will break, allowing the paint flake away causing debris and corrosion.
An elegant solution that eliminates paint-bridges is the introduction of conductive notches protruding from a non-conductive sliding surface. The non-conductive surface eliminates paint-bridges at the interface between the sliding surfaces while the notches expose the metal backing layer, allowing the necessary current flow between the mating components so they will both be painted.