Use of ASTM Standard Practice for Modified Salt Spray (Fog) Testing G85, Annex A2 Cyclic Acidified Salt Fog Testing, for Rapid Screening of Inorganic Coatings on Aluminum 1100 Alloy Fins for Heat Exchangers

BW Lifka; PK Vandenburgh

doi:10.1520/STP14042S

SYMPOSIA PAPER Published: 01 January 1995

STP14042S

Use of ASTM Standard Practice for Modified Salt Spray (Fog) Testing G85, Annex A2 Cyclic Acidified Salt Fog Testing, for Rapid Screening of Inorganic Coatings on Aluminum 1100 Alloy Fins for Heat Exchangers

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Aluminum 1100 alloy fins in small heat exchangers are press fit onto copper tubing and require a protective coating to prevent excessive galvanic corrosion. This program was conducted to determine whether use of the ASTM Standard Practice for Cyclic Acidified Salt (Fog) Testing (G 85-A2), could effectively screen experimental, candidate coatings in a relatively short time. Two weeks of exposure, utilizing only unassembled panels, identified coatings that provided excellent protection. This compares very favorable with the existent quality control test that requires exposure of assembled units for 1000 hours (almost 6 weeks) exposure to the less corrosive, ASTM Standard Test Method of Salt Spray (Fog) Testing (B 117).

Author Information

Lifka, BW

Alcoa Technical Center, New Kensington, PA

Vandenburgh, PK

Alloy Technology Division, Alcoa Technical Center, Alcoa Center, PA

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Details

Developed by Committee: G01

Pages: 115–124

DOI: 10.1520/STP14042S

ISBN-EB: 978-0-8031-5301-1

ISBN-13: 978-0-8031-2014-3

Use of ASTM Standard Practice for Modified Salt Spray (Fog) Testing G85, Annex A2 Cyclic Acidified Salt Fog Testing, for Rapid Screening of Inorganic Coatings on Aluminum 1100 Alloy Fins for Heat Exchangers

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