Coating processes – Direct application of electrical – magnetic – wave – or... – Sonic or ultrasonic
Patent
1995-06-07
1996-06-25
Utech, Benjamin
Coating processes
Direct application of electrical, magnetic, wave, or...
Sonic or ultrasonic
427601, 427433, 4274342, 427436, 4274432, B06B 100
Patent
active
055298168
ABSTRACT:
An improved process is provided for forming a zinc-base alloy coating on an aluminum alloy profile, such as a tube or microtube used in the assembling and brazing of a heat exchanger which is suitable for automotive applications. The process of the present invention is a continuous, high speed coating technique which can utilize aluminum alloy profiles on which an aluminum oxide layer is present. Accordingly, the present invention encompasses an operation by which the aluminum oxide layer is removed so as to enable the zinc-base alloy to metallurgically adhere to the surface of the aluminum alloy profile. The process of this invention also is capable of closely controlling the thickness of the zinc-base alloy coating, such that a sufficient but minimal amount of coating is present to furnish corrosion protection as well as provide sufficient filler metal for a subsequent soldering or low temperature brazing operation.
REFERENCES:
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patent: 3942705 (1976-03-01), Barbay
patent: 3969544 (1976-07-01), Obeda
patent: 4042725 (1977-08-01), Nomaki et al.
patent: 4891275 (1990-01-01), Knoll
patent: 5316206 (1994-05-01), Syslak et al.
Folkedal Leiv A.
Morley Edward J.
Sartini Ramond J.
Syslak Morten
Hartman Domenica N. S.
Hartman Gary M.
Norsk Hydro a.s.
Utech Benjamin
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