Heat exchanger

Details Heat exchanger Heat exchanger

C - Chemistry, Metallurgy

22

C

C22C 21/00 (2006.01) B32B 15/01 (2006.01) F28F 21/08 (2006.01)

Patent

CA 2235921

A new aluminium alloy containing (in wt.%): 0.2 - 0.5 Fe; 0.7 - 1.2 Si; 1.2 - 1.6 Mn; up to 0.3 Mg; up to 0.5 Cu; up to 0.2 Zn; up to 0.1 Ti is used to make the fins of heat exchangers particularly car radiators. The finstock has high post braze strength and thermal conductivity, and has a sufficiently electronegative potential as to be capable of acting as a sacrificial anode for the heat exchanger tubes. By virtue of the absence of Sn, In and Cr, these heat exchangers can be scrapped and melted for re-use.

Nouvel alliage d'aluminium contenant en pourcentages en poids: Fe 0,2-0,5; Si 0,7-1,2; Mn 1,2-1,6, Mg 0,3 maximum; Cu 0,5 maximum; Zn 0,2 maximum; Ti 0,1 maximum. Ledit alliage est utilisé pour fabriquer les ailettes d'échangeurs de chaleur, en particulier, des radiateurs d'automobiles. L'ensemble d'ailettes possède une résistance postérieure au brasage et une conductivité thermique élevées, ainsi qu'un potentiel électrique négatif suffisant pour pouvoir servir d'anode réactive pour les tuyaux de l'échangeur de chaleur. Grâce à l'absence de Sn, In et Cr, on peut récupérer ces échangeurs de chaleur et les fondre afin de les réutiliser.

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