Abstract: A tube for a heat exchanger including a tube structure made of lightweight metal alloy and having an inner surface and an outer surface. The tube further includes: a first layer of material on the outer surface of the tube structure, the first layer having different chemical composition than the tube structure, a second layer of material on the first layer of material, the second layer having different chemical composition than the tube structure and the first layer. The first layer includes metallic material having a lower galvanic potential than the tube structure. The first layer includes the deposition of zinc particles within the first layer. The deposition of zinc is not less than 3 g/m2 and not more than 7 g/m2. The second layer includes an aluminum silicon compound. The deposition of aluminum silicon compound within the second layer is not less than 14 g/m2 and not more than 16 g/m2.

Abstract: A heat exchanger for exchanging heat between a first fluid and a second fluid is disclosed in accordance with an embodiment of the present invention. The heat exchanger includes a first manifold, a second manifold, a bundle of heat exchange elements and a housing. The bundle of heat exchange elements for the first fluid axially extend and provide a fluidal communication between the manifolds. The housing for the second fluid encapsulates at least part of the heat exchange elements to form a fluid tight channel for the second fluid. The housing further includes at least one sacrificial component being of material having lower galvanic potential than the remaining components.