SACRIFICIAL ANODIC COATINGS FOR MAGNESIUM ALLOYS
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United States of America Patent
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Issued Date -
Jul 28, 2011
app pub date -
Jan 27, 2010
filing date -
Jan 27, 2010
priority date (Note) -
Abandoned
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Abstract
Elemental magnesium coatings and methods of applying them to surfaces of magnesium-based alloy articles of manufacture are described. Such coatings may be chosen to be anodic to magnesium and may thus, when applied to magnesium articles, be sacrificial and afford corrosion protection to the articles. The utility of such coatings may be enhanced by supplementing them with a barrier coating such as a passive magnesium-containing alloy, a conversion or anodic coating or paint overlying the sacrificial coating. Methods of applying sacrificial coatings to a magnesium-based alloy article are described and include physical vapor deposition on the article, electrodeposition on the article and dipping the article in molten alloy.
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