Zn-Ni Plating as a Cadmium Alternative

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Zn-Ni Plating as a Cadmium Alternative

Sato, Eri / Iobe, Hajime / Saito, Hidefumi / Takada, Koji / Yamada, Masamichi / Yoshida, Michimasa / Ishihara, Taichi / Taniguchi, Tetsuo

Abstract

In a 2-year program sponsored by SJAC, an aqueous electroplating process using alkaline Zn-Ni with trivalent chromium post treatment is under evaluation for high strength steel for aircraft application as an alternative to cadmium. Commercial Zn-15%Ni rack/barrel plating solutions are basis for plating aircraft parts or fasteners. Brightener was reduced from the original formula to form porous plating that enables bake-out of hydrogen to avoid hydrogen embrittlement condition. Properties of the deposit, such as appearance, adhesion, un-scribed corrosion resistance, and galvanic corrosion resistance in contact with Al alloy, were evaluated. Coefficient of friction was compared with Cd plating by torque-tension measurements. Evaluation of the plating for scribed corrosion resistance, primer adhesion, etc. will continue in FY2007.

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Document information

Title :

Zn-Ni Plating as a Cadmium Alternative

Additional title:

Sae Technical Papers

Contributors:

Sato, Eri (author) / Iobe, Hajime (author) / Saito, Hidefumi (author) / Takada, Koji (author) / Yamada, Masamichi (author) / Yoshida, Michimasa (author) / Ishihara, Taichi (author) / Taniguchi, Tetsuo (author)

Conference:

Aerospace Technology Conference and Exposition ; 2007

Published in:

Sae Technical Paper Series

Publication date :

2007-09-17

ISSN :

2688-3627 , 0148-7191

DOI :

https://doi.org/10.4271/2007-01-3837

Type of media :

Conference paper