Maryland's Defense Patent Database

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Active aluminum rich coatings

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NAWCAD

Chromate-free corrosion-inhibiting coating compositions comprising film-forming binders and galvanic aluminum alloy powders prepared in an oxygen (oxidizing), nitrogen (inert) or nitrogen-hydrogen (reducing) atmosphere having particle sizes ranging up to 100 microns. The aluminum alloy powders having the formula: aluminum-zinc-X (AlZnX) wherein X is an element selected from the group consisting of indium, gallium, tin and bismuth. Improvement in corrosion protection is obtained by the addition of chemical inhibitors such as an azole or talcite clay to the coating which further inhibits the self-corrosion of the aluminum alloy and extends the corrosion protection of the metal substrate being protected.

Inventors: 
Matzdorf, Craig; Nickerson, William
Patent Number: 
Technical domain: 
Materials and Coatings
FIle Date: 
2011-01-21
Grant Date: 
2012-09-11
Grant time: 
599 days
Grant time percentile rank: 
10
Claim count percentile rank: 
7
Citations percentile rank: 
1
'Cited by' percentile rank: 
1
Assignee: 
US NAVY