Wärmeübertrager, insbesondere Verdampfer für eine Kraftfahrzeug-Klimaanlage

摘要

The invention concerns a plasmapolymer surface coating which is deposited by low-temperature plasmapolymerization with the addition of a gaseous monomer and comprises a plurality of layers which are applied in abrupt or gradual succession. The invention further concerns a coating process for providing this coating, and a heat exchanger coated therewith. According to the invention, the plasmapolymer surface coating comprises an inner layer (8a) with covalent adhesion-promoting bonds, a central layer (8b) which is impervious to water vapour and forms in a closely cross-linked manner, and an outer layer (8c) which behaves hydrophilically and whose formation employs an oxygen, chlorine or fluorine-containing monomer gas flow. A multipurpose multilayer coating is thus produced which internally has an adhesion-promoting nature and externally has a hydrophilic nature which additionally provides anti-corrosion protection. Finally, the invention concerns the use of the coating, for example, for the external coating of evaporators for vehicle air-conditioning systems.