Abstract: A heat exchanger assembly for an automotive vehicle includes at least one tube having an internal layer and an external layer. The external layer is an aluminum based material, and the internal layer is a stainless steel based material. At least one turbulator is disposed inside the tube and is formed of a stainless steel based material.

Abstract: A heat exchanger assembly for an automotive vehicle is provided. The heat exchanger includes at least one tube having a housing and at least one turbulator disposed inside the tube. The turbulator has an exposed surface. A corrosion resistant, thermally conductive, nonelectrolytic metallic alloy is deposited on the inner surface of the housing of the tube, and is also deposited on the exposed surface of the turbulator.

Abstract: A rotational element for a wheel comprises a cast iron segment and an anti-lock brake system exciter ring adhering to the cast iron segment as a cast-in insert. The anti-lock brake system exciter ring is made of a material having greater corrosion resistance and a higher melting point than the cast iron. The exciter ring includes at least a first tang penetrating the cast iron segment. The exciter ring is preferably made from ferritic stainless steel. For disk brake systems the rotational element serves as a disk brake rotor. In vehicles using drum brakes the rotational element serves as a wheel hub.