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MG TD TF 1500 - Protect inside of horns from rust

I took the Lucas Windtone horns off of my TF to clean and paint. Good news, they still work. I removed the rust from the diaphragm, but it is pitted. The original plating on the base plate, diaphragm, and armature is failing.

How can I protect them?

> Will galvanized paint protect the base plate any better than enamel?
> Is it advisable to zinc plate the diaphragm and armature (DIY)? Can't leave in acid bath very long. Must completely neutralize beneath the armature.
> If not zinc plating, is there any other way to prevent the diaphragm from rusting?

Thanks for your help,

Lonnie
TF711





LM Cook

Consider using gun bluing on the plate. The ones I have see appeared to be blued.
Bruce Cunha

Thanks Bruce. Bluing may be a good choice for the diaphragm. Even cold bluing is better than nothing.

Looks like the baseplate is zinc plated or has a protective paint.

Lonnie
TF7211
LM Cook

Hi Lonnie

If you need some replacement parts I have a bin full of TD/TF horns.

Gary
gl krukoski

When I restore the Windtone horns, I usually coat the internals in lacquer after removing all rust. Not too much on the diaphragm otherwise it will dampen the sound. It usually works for longer than I will own the car.
Lew Palmer

Gary - I’ll call you if I screw up my horns while trying to restore them. Good to know I have a replacement standing by.

Lew - I zinc plated one of the diaphragms a few minutes ago. Looks pretty good. Now comes the hard part ... cleaning and protecting the base plate. Lacquer may be the answer. Won’t know how well I did until I assemble and test.

Lonnie
TF7211
LM Cook

Here's an update on my horns.

I cleaned the rust off of the base plate as well as I could then brush plated bottom of the base plate with zinc. I feel that the base plate and the diaphragm are protected better than if painted.

Lonnie
TF7211
LM Cook

This thread was discussed between 15/10/2020 and 17/10/2020

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