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ASM Handbook

Surface Engineering

Edited by
C.M. Cotell
C.M. Cotell
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J.A. Sprague
J.A. Sprague
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F.A. Smidt, Jr.
F.A. Smidt, Jr.
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ASM International
Volume
5
ISBN electronic:
978-1-62708-170-2
Publication date:
1994
Book Chapter

Dip, Barrier, and Chemical Conversion Coatings

By
Alan Gibson
Alan Gibson
ARMCO Inc.
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Published:
1994

Abstract

This article focuses on the various techniques for removing contaminants in the surface preparation of steel for hot-dip coatings: wet cleaning methods, including alkaline cleaning, electrolytic cleaning, chemical pickling, and electrolytic pickling; flame cleaning and furnace-atmosphere techniques, such as Sendzimir oxidation/reduction method; other specialized methods, namely, fluxes, mechanical cleaning, and ultrasonic methods; or a combination of these.

Abstract

This article discusses the processes involved in continuous hotdip coating of steel sheets, namely, hot and cold line processing, surface preparation, and post treatment. It outlines the properties and microstructures of metals and their alloys used in this process. The coatings considered in this article include metal coatings, such as zinc coatings, and alloy coatings, such as zinc-iron, types 1 and 2 aluminum, Zn-5AI, Zn-55AI, and lead-tin coatings.

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Alan Gibson, 1994. "Dip, Barrier, and Chemical Conversion Coatings", Surface Engineering, C.M. Cotell, J.A. Sprague, F.A. Smidt, Jr.

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