Session Details

Session 9: Aerospace/Defense/Military Zinc Nickel Advancements

Abstract Number:

131

This presentation will describe the identification and ‎development of a new class of corrosion ‎inhibitive pigment for use ‎in organic coatings for the protection of zinc nickel plated steel ‎and the ‎results of testing to date. This new primer; which is VOC ‎and REACh compliant, can substitute ‎chromate primers without ‎any compromise on corrosion resistance.‎

Topics:

Aerospace / Defense / Military

Aerospace materials are undergoing an accelerated evolution to meet new marketplace and ‎‎regulatory restrictions on hazardous materials, including the elimination of chromates (Cr ‎‎6+) from ‎all chemical processes utilized currently in industry. In the area of high strength ‎steel structures, ‎considerable progress has been made in the development and qualification ‎of zinc nickel protective ‎plating to replace cadmium and titanium-cadmium plating systems.‎

While these new alloy plating technologies fulfill their requirements for protection of the ‎underlying ‎steel, the zinc nickel plating itself requires a compatible organic finish to deliver ‎the full set of ‎requirements for the component.‎

It is known that most of existing aerospace primers have chromates in their composition. ‎Commercial ‎chromated free primers exist but have a marginal performance when used over ‎high strength steel ‎and Zn-Ni plating. This introduces significant risk of corrosion for the ‎aerospace industry and for on ‎landing gears in particular.‎

Our work describes the identification and development of a new class of corrosion inhibitive ‎pigment ‎for use in organic coatings for the protection of zinc nickel plated steel, and the ‎results of testing to ‎date. This new primer which is VOC and REACh compliant can substitute ‎chromate primers without ‎any compromise on corrosion resistance.‎

CHROMATE-FREE PRIMER USING EcoSkyTM PIGMENT FOR ZnNi PLATED HIGH-STRENGTH ‎STEEL

Marilea Manzini, Ph.D.

Fellow in Materials and Process Technology / Mechanical Systems

Collins Aerospace