The Boeing Company

Chun-Ming Wong

Matthias P Schriever

Yukimori Moji

A controlled method of anodizing aluminum comprises formation of an aqueous solution of sulfuric and boric acids, immersion of a workpiece in the solution maintained at about room temperature and controlled application of voltage to achieve a current density not greater than about 10 Amperes per square foot. Aluminum oxide coatings in the weight range of from about 200 to 600 milligrams per square foot applied in this manner have properties as good as or superior to coatings applied in traditional hexavalent chromium anodizing solutions.

Method for anodizing aluminum

A laminate of a plurality of thermosetting resin films are joined together with a thermosetting resin to impart a peel strength between films of about 1 to 3 pounds per inch of width.

Growing community of inventors

Seattle, WA, United States of America

Chun-Ming Wong