Alcoa Inc.

Aluminum Company of America

Alcca Inc.

Joseph P Harenski

Roger W Kaufold

Larry F Wieserman

Neville C Whittle

Brian James Morrissey

Robert L Shadwick, Jr

Susanne Marie Opalka

Gary A Nitowski

Joseph D Guthrie

Patricia Stewart

Paula L Kolek

Calvin Bates

Jamal Righi

Norman J Panseri

Daniel W Severa

Sally A Jankosky

Daniel C Johnson

An aluminum alloy article is cleaned to remove oxides and organic matter from a coatable surface, coated with a composition comprising an organic resin and a fluorine compound, and then heated to an elevated temperature to decompose the organic resin and at least a portion of the fluorine compound. After heating the coated surface is left with a protective oxyfluoride film that prevents blistering and hydrogen pickup and promotes hydrogen degassing from the article.

Protective fluoride coatings for aluminum alloy articles

A coating for a mold surface of a casting mold includes a metallic bond coat bonded to the mold surface and having a continuous, uniform thickness of between about 0.002 to 0.005 inch on the mold surface. A topcoat of yttria stabilized zirconia is located on top of the metallic bond coat and has a continuous, uniform thickness of between about 0.005 to 0.030 inch. The topcoat has a porosity between 5-15%. The topcoat has a surface layer having a thickness of between about 0.001 to 0.002 inch and a porosity of less than 1%.

Mold coating

A method of treating a surface of a stacked aluminum alloy ingot during a heating process. Spacer blocks are positioned adjacent aluminum alloy ingots to form a stack, wherein the spacer block has a support surface contacting a contact surface of the aluminum alloy ingot, and at least one of the support surface and the contact surface include a fluorine containing material. The stack is heated to at least a temperature at which the fluorine containing material decomposes or vaporizes such that a layer of a fluorinated oxide compound is formed at the interfaces between the ingots and the spacer blocks.

Treatment of ingots or spacer blocks in stacked aluminum ingots

A spacer member in a furnace including an aluminum tube containing a ceramic material. The ceramic material provides high compressive strength and the composite product resists high temperature creep.

Ceramic core spacer blocks for high temperature preheat cycles

Aluminum alloy sheet is provided with a primer layer comprising a reaction product of aluminum oxide or hydroxide and a vinylphosphonic acid-acrylic acid copolymer, coated with a polymer coating composition containing polyvinyl chloride or an epoxy. The polymer coated aluminum alloy sheet is shaped into container bodies for food containers or container end panels for aluminum food and beverage containers.

Copolymer primer for aluminum alloy food and beverage containers

Steel tooling for die-casting low iron content aluminum alloys is surface treated with a layer of CrN applied to a thickness of at least 4 microns, and preferably 5-10 microns, by physical vapor deposition (PVD), and preferably a steered are evaporation PVD process. The CrN protects the steel tooling from dissolution and erosion by the highly active molten aluminum.

CRN coated die-casting tools for casting low aluminum iron alloys and

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Export, PA, United States of America

Joseph P Harenski