The Boeing Company

Uxoa Izagirre-Etxeberria

Francisco Jesus Cano-Iranzo

Patricia Santa Coloma-Mozo

Oihana Zubillaga-Alcorta

Nieves Lapena-Rey

Nieves Lapena

Nieves Lapeña-rey

Francisco Jesús Cano-Iranzo

A chromium-free conversion coating is prepared by the addition of inorganic metallic salts and one or more silanes to dispersions of conducting polymers which are then exposed to alloys of aluminum or other metals. Advantageously, the performance of the coating is comparable to that of conventional chromium-based methods for a number of aluminum alloys having particular significance in the manufacture of aircraft.

Chromium-free conversion coating

A chromium-free conversion coating is prepared by the addition of inorganic salts to dispersions of conducting polymers which are then exposed to alloys of aluminum or other metals. Advantageously, the performance of the coating is comparable to that of known Cr (chromium)-based methods for a number of aluminum alloys having particular significance in the manufacture of aircraft.

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Zumaia, Spain

Uxoa Izagirre-Etxeberria