Howmet Aerospace Inc.

Ryan N Scott

James M Marinelli

Michael Scott Flint

Nicola Menegazzo

Jennifer L Giocondi

Kelly M Weiler

John R Mcallister

Kirsten L Genson

John L Keener

David M Keltz

Christopher M Fiorina

Metallic substrate treatment methods and articles comprising a phosphonate functionalized layer are provided. The method comprises contacting a metallic substrate comprising at least one of aluminum and an aluminum alloy with a fluid to form a phosphonate functionalized layer on at least a region of the metallic substrate. The fluid comprises at least one of a phosphonate containing acid and a derivative thereof. At least one of the phosphonate containing acid and the derivative thereof comprises a pKa of a first acidic proton. The fluid comprises a pH at least 0.5 pH value greater than the pKa of the first acidic proton. The article comprises a metallic substrate comprising aluminum or an aluminum alloy and a phosphonate functionalized layer on at least a region of the metallic substrate.

Metallic substrate treatment methods and articles comprising a phosphonate functionalized layer

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Plum, PA, United States of America

Ryan N Scott