Spring plate protection and color.

[ILXLR8]

I have 3 spring plate questions.
I see some spring plates are black and some are yellow cadmium plated.

What is the proper factory color for a 76 912E or 76 911?
What is the best way to protect the spring plate for long term ownership?
If you had a choice to powder coat or cadmium plate (either yellow or black) for the same price, what would you do?

Thanks!

[911tracker85]

I had mine yellow zinc plated.

[911tracker85]

if you decide to go black, you may want to consider cerakote. I had that done to my fan, housing, and oil tank. beautiful finish and is supposed to be much tougher than PC. and a much thinner coating than PC.

getting ready to ship him more stuff to replate.

good luck on your project.

[Trackrash]

Jumping in here. What are people using to keep their yellow plating shiny? Mine, either zinc or cad, dull out after a year or two.

[Ctopher]

Originally Posted by Trackrash

Jumping in here. What are people using to keep their yellow plating shiny? Mine, either zinc or cad, dull out after a year or two.

I was thinking when I do my hardware I was going to have some parts clear cerakote applied to keep them bright, shiny and durable. The downside is you protect the sacrificial metal from doing what it’s supposed to do. So I was only planning to do larger items like spring plate, cover and probably calipers with the clear.


CTopher

[ILXLR8]

Thanks everyone for the info! Some of you may have seen other posts looking for details to assist me in my 912E restoration.
I am trying to sort thru things and plan to send parts for yellow cad and also black powder. Not sure about black cad yet. I want to re-plate the caliper bolts so was maybe thinking spring plates as well. If all I have are the bolts, I may ship them out to a small batch shop rather than the local that has minimums.
I know that adjustable spring plates were yellow cad. My 76 looked black, but hard to tell what was color and what was age, dirt, etc.
I was a tad bit concerned about powder. Not sure it it may effect adjustment thru time. Maybe the plastic compresses and then causes a looseness in the spring-plate adjusting hardware?

[Ctopher]

Originally Posted by ILXLR8

I was a tad bit concerned about powder. Not sure it it may effect adjustment thru time. Maybe the plastic compresses and then causes a looseness in the spring-plate adjusting hardware?

Powder doesn’t compress, it’ll crush and flake off and allow corrosion underneath. And what I’ve seen, once it starts it seems to continue.


CTopher

[911pcars]

CAD and zinc coatings are sacrificial, meaning they will disappear before the base metal starts to corrode. CAD lasts longer than zinc. Ceramics, like Cerakote, should last longer. There's also a high gloss and matte clear.



Sherwood
(no affiliation)