High strength dielectric washer?

Hercules28 · Oct 29, 2020

Hi all,

I am looking for a high strength dielectric washer (>100ksi yield)
I have a test setup of Inconel to Steel in a Salt Spray chamber.

I am aware of the potential for galvanic action and I am looking for a high strength dielectric. The force between Inconel and Steel will be max ~100ksi

Any Ideas?

I also read in the forum about LanoCote and Tef Gel as coatings.
this is a 10 day test so it doesn't have to last forever.

The Inconel is required for strength and to also not corrode in the salt spray.
I can consider alternatives to the Inconel..however they need to be very strong and not corrode.

What I am testing is the Steel under stress. Inconel is used to create stress.

Thanks,

Herc

SwinnyGG · Oct 29, 2020

Ceramic washers are readily available and have good dialectric properties. They can be fragile though, especially if used on surfaces that aren't well finished.

EdStainless · Oct 29, 2020

Ceramic is the only way to go with this.
How dielectric do you need?
Reach out to the CoorTek guys for info.

= = = = = = = = = = = = = = = = = = = =
P.E. Metallurgy, consulting work welcomed

Hercules28 · Oct 30, 2020

Thanks, I really don't know how to specify the dielectric strength needed.
Just want to break the electrical contact so I don't get galvanic action.

I will look into and let you know how it worked.

Thanks again!

stevenal · Nov 2, 2020

See chart near bottom of page

Talking mV here. You don't need high dielectric strength, just non-conducting.

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High strength dielectric washer?

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