Coating for heat exchanger material

Abstract

The invention relates to a material for a heat exchanger, that is capable of being in contact with a heat carrier fluid, said material including two or three layers and said material thus including a web (3) covered with a coating layer (2) in direct contact with said fluid, wherein said coating layer (2) is to be brazed, characterised in that the coating layer contains between 1.2 and 1.8 mass % of zinc and between 0.9 and 1.8 mass % of manganese and / or between 0.05 and 0.25 mass % of zirconium, and in that it further contains between 0.3 and 1 mass % of silicon, and / or between 0.3 and 0.9 mass % of iron and / or between 0.1 and 0.4 mass % of copper and / or magnesium in an amount lower than 0.05 mass % and / or between 0.05 and 0.25 mass % of titanium.

Description

technical field [0001] The invention relates to the field of heat exchangers and in particular to a heat exchanger through which a fluid passes. Background technique [0002] Pipes for heat exchangers are currently known, the ends of which are usually respectively fixed to two header tanks. These tubes form the exchange bundle of the heat exchanger. In practice, a heat transfer / calorific fluid (usually a liquid of coolant type) flows inside the tubes and exchanges heat with another fluid (usually air) flowing outside the tubes. [0003] Fluids, especially when used primarily in liquid form in vehicles, are often corrosive to the metals that make up the pipes. Usually, the core of the pipe's wall, that is to say its core, is coated with a coating for contact with the fluid and as a sacrificial protection layer, in particular against chlorides. Thus, the coating is corroded, while the core of the pipe's wall is not attacked. The coating includes approximately 1% by weight ...

AI Technical Summary

Problems solved by technology

Finally, the addition of material obviously has a cost, even higher, because the structure of the coating has a specific structure due to its specialized chemical function

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