B - Operations – Transporting – 23 – K
Patent
B - Operations, Transporting
23
K
B23K 35/02 (2006.01) B23K 35/28 (2006.01) B32B 15/01 (2006.01) C22C 21/02 (2006.01) F28D 21/00 (2006.01)
Patent
CA 2726650
The invention relates to a brazing metal sheet consisting of an aluminum alloy core sheet coated on at least one surface with a cladding layer forming a sacrificial anode, and is characterized in that said cladding layer consists of an aluminum alloy having a chemical composition, as expressed in weight percent, of: Si: > 2.0 7.0 Fe < 0.5 Cu < 1.0 Mn: 1.0 2.0 Mg < 0.5 Zn: 1.0 3.0 Cr < 0.25 Ni < 1.5 Ti < 0.25 Co < 1.5 V, In, Sn, Zr, Sc < 0.25 each; other elements < 0.05 each, and 0.15 total. The invention also relates to a heat exchanger tube produced by the bending and brazing of a brazing metal sheet, the sacrificial anode-forming cladding layer of which constitutes the inner coating of the tube, or the inner liner.
L'invention a pour objet une tôle de brasage constituée d'une tôle d'âme en alliage d'aluminium revêtue sur au moins une face d'une couche de placage formant anode sacrificielle, caractérisée en ce que ladite couche de placage est constituée d'un alliage d'aluminium de composition chimique, exprimée en pourcentages pondéraux: Si : > 2,0 - 7,0 Fe < 0,5 Cu < 1,0 Mn : 1,0 - 2,0 Mg < 0,5 Zn : 1,0 - 3,0 Cr < 0,25 Ni < 1,5 Ti < 0,25 Co < 1,5 V, In, Sn, Zr, Sc < 0,25 chacun, autres éléments < 0,05 chacun et 0,15 au total. L'invention a également pour objet un tube d'échangeur thermique réalisé par pliage et brasage à partir d'une tôle de brasage dont la couche de placage formant anode sacrificielle constitue le revêtement intérieur du tube ou inner-liner .
Henry Sylvain
Perrin Elodie
Alcan International Limited
Alcan Rhenalu Sas
Norton Rose Or S.e.n.c.r.l. S.r.l./llp
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