PICKLING METHOD FOR PROFILES, ROLLED STRIPS, AND SHEETS MADE OF ALUMINIUM ALLOYS
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United States of America Patent
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Issued Date -
Oct 1, 2020
app pub date -
Jun 12, 2020
filing date -
Dec 12, 2017
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Abstract
In a method for cleaning a non-machined aluminum alloy product involving alkaline degreasing and treatment thereof after alkaline pickling with an acidic solution, the aluminum alloy product undergoes (a) initial acid cleaning before alkaline degreasing or (b) alkaline degreasing, followed by a subsequent acid rinse, alkaline treatment anew and an additional acid rinse thereafter. The aluminum alloy product may be a rolled aluminum alloy strip, a rolled aluminum alloy sheet and an aluminum alloy profile.
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