Permanganate based conversion coating compositions
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United States of America Patent
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Aug 9, 2022
Grant Date -
Nov 12, 2020
app pub date -
Jun 1, 2020
filing date -
May 14, 2013
priority date (Note) -
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Abstract
A composition for application to a substrate comprising a carrier, a permanganate ion source, and a corrosion inhibitor comprising a rare earth ion, an alkali metal ion, an alkaline earth metal ion, and/or a transition metal ion is disclosed. A substrate or article including the composition for application to a substrate, and a method of treating a substrate comprising applying the composition to a substrate to form a permanganate treated surface of the substrate, and applying a lithium containing composition on the permanganate treated surface are also disclosed.
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