Atmospheric Corrosion Behavior of Aluminum-Zinc Alloy-Coated Steel

JC Zoccola; HE Townsend; AR Borzillo; JB Horton

doi:10.1520/STP27323S

SYMPOSIA PAPER Published: 01 January 1978

STP27323S

Atmospheric Corrosion Behavior of Aluminum-Zinc Alloy-Coated Steel

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The influence of the aluminum content of hot-dip aluminum-zinc alloy coatings on their corrosion behavior was studied by means of salt-spray and atmospheric corrosion tests. The objective was to develop an improved aluminum-zinc alloy coating on steel that would be more durable than galvanized coatings and that would be more protective to cut edges and areas of mechanical damage than hot-dip aluminum coatings. The optimum alloy was found to be 55 weight percent aluminum-zinc. This new alloy coating is two to four times as corrosion-resistant as a galvanized coating of similar thickness. Furthermore, for the galvanic protection of cut edges of sheet in some environments, this coating proved to be superior to aluminum coatings.

Author Information

Zoccola, JC

Bethlehem Steel Corp., Bethlehem, Pa

Townsend, HE

Bethlehem Steel Corp., Bethlehem, Pa

Borzillo, AR

Bethlehem Steel Corp., Bethlehem, Pa

Horton, JB

Bethlehem Steel Corp., Bethlehem, Pa

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Details

Developed by Committee: G01

Pages: 165–184

DOI: 10.1520/STP27323S

ISBN-EB: 978-0-8031-4717-1

ISBN-13: 978-0-8031-0286-6

Atmospheric Corrosion Behavior of Aluminum-Zinc Alloy-Coated Steel

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