Protected metal article
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United States of America Patent
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Dec 13, 1988
Issued Date -
N/A
app pub date -
Oct 5, 1987
filing date -
Apr 10, 1986
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A culvert having a corrosion resistant composite coating and a method of producing the corrosion resistant composite coating. The coating method is for use in a coventional hot dip coating line of the type wherein a steel strip, having been appropriately pretreated so as to be at or above the coating temperature and have its surface free of oxides, is caused to pass through a bath of molten coating metal. A fibrous aramid paper is bonded to the surface of the steel strip by pressing the fibers into the molten coating layer immediately after the steel strip exits the coating bath. The steel strip may be fabricated into construction products such as culvert which may be further protected with bituminous type coatings.
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