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Induction hardening quenchant causes electroplating stains

We are doing Induction Hardening (Quenchant ~5% Polymer solution) and Tempering (~380 °C) for Gears(Material C 45)followed by Zinc plating with Yellow passivation. We observe many Gears with stain mark / patches left due to evaporation of Quenchant. Could somebody suggest pre-cleaning in Plating process or cleaning between Induction Hardening and Tempering by which the situation could be improved?

A.Ramadoss
Auto components - Coimbatore, Tamilnadu, India
2004

I am interested to your article please give me more information.

Bogie Fajar s
- Jakarta, Indonesia
2005

You have to remove the scales that caused by heat treating by brushing or shut blast prior to electroplating.

Reza Rezaei
- Yazd, Iran
August 24, 2008

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