A New Cladding Alloy for Coolant-Side Corrosion Protection of Vacuum-Brazed Aluminum Radiators

Scott AC

doi:10.1520/STP32972S

SYMPOSIA PAPER Published: 01 January 1986

STP32972S

A New Cladding Alloy for Coolant-Side Corrosion Protection of Vacuum-Brazed Aluminum Radiators

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K805, a nonvolatile aluminum-tin cladding alloy, was developed to provide coolant-side corrosion protection in vacuum-brazed aluminum automobile radiators and heat exchangers. Its performance was evaluated in laboratory glassware corrosion tests of coupon specimens, and a 80 470-km (50 000-mile) simulated service test of vacuum-brazed production automobile radiators. The alloy provided adequate cathodic protection to 3000-series core alloys in corrosive water and depleted glycol automotive coolants. The performance of K805 cladding is compared to that of aluminum-zinc cladding alloys (for example, 7072), the protective properties of which are degraded in vacuum-brazing applications because of the volatility of zinc.

Author Information

AC, Scott

Kaiser Aluminum and Chemical Corp., Center for Technology, Pleasanton, CA

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Details

Developed by Committee: D15

Pages: 27–43

DOI: 10.1520/STP32972S

ISBN-EB: 978-0-8031-4959-5

ISBN-13: 978-0-8031-0432-7

A New Cladding Alloy for Coolant-Side Corrosion Protection of Vacuum-Brazed Aluminum Radiators

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