Cathodic protective coating on magnesium or its alloys
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United States of America Patent
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Sep 18, 2001
Issued Date -
N/A
app pub date -
Jun 20, 2000
filing date -
Oct 21, 1997
priority date (Note) -
Expired
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Abstract
A method is provided for treating a magnesium-containing article to form a cathodic protective coating on such article. This is done by electrochemically treating the article, acting as a cathode, in an alkaline solution, preferably at a temperature of between 40 and 80.degree. C., with a cathodic current density of 5-200 mA/cm.sup.2. The treatment produces a magnesium-containing article having a protective coating of magnesium hydride of predetermined thickness with a high count of hydrogen particles.
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