C - Chemistry – Metallurgy – 23 – C
Patent
C - Chemistry, Metallurgy
23
C
C23C 22/42 (2006.01) C23C 22/44 (2006.01) C23F 11/18 (2006.01)
Patent
CA 2333558
An anticorrosion treatment of an aluminium/zinc alloy surface is disclosed. The treatment includes the steps of forming on the alloy surface a coating of a solution which contain 5-40 grams of molybdenum per litre of the solution, 2-29 % by volume of a phosphoric acid, and a surface etchant. The treatment also includes drying the coating to form a dried coating having a loading of molybdenum of at least mg/m2 of the dried coating and of phosphorus of at least 15 mg/m2 of the dried coating.
L'invention concerne un traitement anticorrosion pour une surface en alliage de zinc/aluminium. Le traitement consiste à former, sur la surface de l'alliage, un revêtement d'une solution comprenant 5-40 grammes de molybdène par litre de solution, 2-19 % en volume d'un acide phosphorique, et un réactif de surface. Le traitement consiste également à sécher le revêtement de manière à former un revêtement séché, possédant une charge de molybdène d'au moins 10g/m<2> du revêtement séché et une charge de phosphore d'au moins 15g/m<2> du revêtement séché.
Bhp Steel (jla) Pty. Ltd.
Norton Rose Or S.e.n.c.r.l. S.r.l./llp
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