Re: [EE] Nickel plated brass vs Zinc plated steel

On Wed, 29 Jan 2025, Brent Brown wrote:

> Hi,
>
> An M18 inductive proximity sensor that I buy from a reputable brand has a Nickel
> plated brass body, and is (or at least it used to be) supplied with a pair of Nickel
> plated brass mounting nuts.
>
> They have now begun supplying the Nickel plated brass sensor with Zinc plated
> steel mounting nuts. On questioning they quote increases in the price of brass and
> worries about supply as the reasons for the change. Fair enough, possibly.
>
> I am happy with my original choice of nickel plated brass in providing a suitable level
> of corrosion resistance in this application, but I'm less than happy with Zinc coated
> steel. My main question though is, are Nickel/Zinc even galvanically compatible?

according to this table NO!

https://www.qsl.net/n9zia/electrochemical.html

Regards
Sergio