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Conductivity drop with top coat over Zinc - Nickel Plating

2007

We, a pioneer in auto electricals in India, look for the following clarifications.

1) What could be the conductivity drop among the Zinc - Nickel plated part (mild steel) with trivalent Clear (Blue), trivalent yellow & trivalent yellow?

2) What could be the conductivity drop with Inorganic topcoat, Organic topcoat over the above respective passivation?

Does any one having the data which gives better idea as the component is critical in electromagnetic application. Also, Please do let us know what is the best choice of plating/coating for electromagnetic/corrosion resistance (720 hours after heat treatment) applications?

Thanks in advance.

Parthasarathy Narasimhun
auto electricals - Chennai, Tamilnadu, India

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