Cathodic protective coating on magnesium or its alloys and...

Details Cathodic protective coating on magnesium or its alloys and... Cathodic protective coating on magnesium or its alloys and...

C - Chemistry, Metallurgy

25

D

204/24.3

C25D 11/00 (2006.01)

Patent

CA 2218983

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°C, with a cathodic current density of 5-200 mA/cm2. The treatment produces a magnesium-containing article having a protective coating of magnesium hydride of predetermined thickness with a high count of hydrogen particles.

Divulgation d'une méthode pour traiter un article contenant du magnésium afin de former un revêtement de protection cathodique sur celui-ci. On réalise ceci en traitant électrochimiquement cet article, qui agit comme cathode, dans une solution alcaline, de préférence à une température située entre 40 et 80 .degré.C, à l'aide d'un courant cathodique de densité allant de 5 à 200 mA/cm2. Grâce à ce traitement, on produit un article contenant du magnésium recouvert d'un revêtement protecteur d'hydrure de magnésium, d'épaisseur prédéterminée, et comptant beaucoup de particules hydrogénées.

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