Method for protecting heat exchanger tubes made of aluminum against erosion and/or corrosion
AssigneeSociete Anonyme des Usines Chausson
InventorJean-Pierre Moranne
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Abstract
To prevent the erosion caused by cavitation phenomena between a turbulence member and a tube of a tubular heat exchanger, as well as the corrosion by differential aeration in thin intervals between the tube of aluminum containing alloy and an elastomeric gasket, aluminum silicon platings are provided on the two walls of the tube.
Claims4
Heat exchanger comprising tubes made of an aluminum containing alloy, a perforated tube plate forming tube passages in which are mounted the tubes, elastomeric tightness sockets inserted between said tubes and said tube passages, said tubes having an inner surface and an outer surface with at least one of the inner surface and outer surface being coated with a layer of aluminum-silicon alloy containing from 5 to 12% silicon.
Dependencies are inferred from the claim text.