US2009266715A1PendingUtilityA1

Anodization process for coating of magnesium surfaces

64
Individually held — no corporate assignee on recordPriority: Nov 12, 2004Filed: Mar 2, 2009Published: Oct 29, 2009
Est. expiryNov 12, 2024(expired)· nominal 20-yr term from priority
Inventors:Earl R. WoolseyWilliam Gorman
C25D 11/30
64
PatentIndex Score
0
Cited by
0
References
0
Claims

Abstract

A composition that includes at least one alkali metal hydroxide, at least one alkali metal silicate, at least one alkali metal fluoride, and hydrogen peroxide. The invention also includes a method of applying an anodic coating on at least a portion of a surface of a magnesium-containing article that includes the steps of electrically connecting the article with a power source, absorbing a composition with an absorbent applicator, which is in contact with a cathode, supplying a voltage from the power source, and contacting the absorbent applicator with the article, wherein the composition comprises at least one alkali metal hydroxide, at least one alkali metal silicate, at least one alkali metal fluoride and hydrogen peroxide.

Claims

exact text as granted — not AI-modified
1 .- 15 . (canceled) 
   
   
       16 . A method of applying an anodic coating on at least a portion of a surface of a magnesium-containing article comprising:
 electrically connecting the article with a power source;   absorbing a composition with an absorbent applicator, which is in contact with a cathode;   supplying a voltage from the power source; and   contacting the absorbent applicator with the article, wherein   the composition comprises at least one alkali metal hydroxide, at least one alkali metal silicate, at least one alkali metal fluoride, and hydrogen peroxide.   
   
   
       17 . The method of  claim 16 , wherein the uncoated article is electrically connected to the power source through an anode. 
   
   
       18 . The method of  claim 16 , wherein said step of absorbing the composition with the absorbent applicator is accomplished by dipping the absorbent applicator into a container holding the composition. 
   
   
       19 . The method of  claim 16 , wherein the supplied voltage is less than or equal to about 100 V. 
   
   
       20 . The method of  claim 16 , wherein the supplied voltage is less than or equal to about 50 V. 
   
   
       21 . The method of  claim 16 , further comprising moving the absorbent applicator across the surface of the article to be coated. 
   
   
       22 . The method of  claim 16 , further comprising repeating the steps of absorbing a composition with an absorbent applicator, which is in contact with a cathode and contacting the absorbent applicator with the article. 
   
   
       23 . The method of  claim 16 , wherein the composition comprises sodium hydroxide, sodium silicate, sodium fluoride, and hydrogen peroxide. 
   
   
       24 . The method of  claim 16 , wherein said article further comprises steel. 
   
   
       25 .- 28 . (canceled) 
   
   
       29 . A method of applying an anodic coating on at least a portion of a surface of an article, the article including a magnesium-containing portion and a dissimilar metal or metals attached to the magnesium-containing portion, the method comprising:
 electrically connecting the article with a power source;   absorbing a composition with an absorbent applicator, which is in contact with a cathode;   supplying a voltage from the power source; and   contacting the absorbent applicator with the article, wherein   
     the composition comprises:
 at least one alkali metal hydroxide having a concentration of about 0.5 M to about 5 M; 
 at least one alkali metal silicate having a concentration of about 50 g/L to about 440 g/L; 
 at least one alkali metal fluoride having a concentration of about 0.01 M to about 0.5 M; and 
 hydrogen peroxide having a concentration of about 0.2 M to about 3.0 M. 
 
   
   
       30 . The method of  claim 29 , wherein the supplied voltage is less than or equal to about 100 V. 
   
   
       31 . The method of  claim 29 , wherein the supplied voltage is less than or equal to about 50 V. 
   
   
       32 . The method of  claim 29 , wherein the dissimilar metal or metals is a ferrous metal. 
   
   
       33 . The method of  claim 29 , wherein the dissimilar metal is steel. 
   
   
       34 . The method of  claim 16 , wherein the article further comprises a ferrous metal.

Join the waitlist — get patent alerts

Track US2009266715A1 — get alerts on status changes and closely related new filings.

We store only your email — no account needed. See our privacy policy.