Rusted transformers

[Cstell]

Just curious how rusted transformers could affect tone. Is there a way to safely remove it or is it best to leave it be? Any input would be appreciated!

Chris

 

[MonstersOfTheMidway]

A little rust is usually not a bad thing, so in that case I'd just leave it alone.

Do you have any pictures of the rusted transformer in question?

 

[anitoli]

Exterior rust on the lamination's has no effect on tone whatsoever. Ignore it.

 

[Chris-in-LA]

Rust! I used to live by the beach. No problems so far.

 

[paul-e-mann]

But if the op wanted couldnt he clean the rust off and paint the transformer with varnish?

 

[ampeq]

But if the op wanted couldnt he clean the rust off and paint the transformer with varnish?

Yep. The only way this would be a problem is if the rust was separating the plates. To go that far it would be IN the ocean.

 

[paul-e-mann]

Yep. The only way this would be a problem is if the rust was separating the plates. To go that far it would be IN the ocean.

Maybe some electronic cleaner and a stiff toothbrush could get the rust off without making too much of a mess.

 

[ampeq]

Maybe some electronic cleaner and a stiff toothbrush could get the rust off without making too much of a mess.

3M Scotch Brite works best. I would do it dry though, rust is like a cancer. Unless you completely remove it, it will never stop. And you don’t want it to run down between the plates where it can start to separate them. I think a lot of transformers have a little surface rust because they are raw steel usually. I have a huge one on the floor of my shop a guy gave me that is almost new and it’s rusty too.

 

[EADGBE]

Yes leave the rust alone. https://www.mercurymagnetics.com/transformer-rust-friend-or-foe/

 

[paul-e-mann]

Yes leave the rust alone. https://www.mercurymagnetics.com/transformer-rust-friend-or-foe/

This is the answer!

 

[Chris-in-LA]

I knew it, rust means mojo

 

[Old Punker]

This is the answer!

I've heard the same thing, I wouldn't try to remove it.

 

[Matthews Guitars]

If it really bugs you use a NYLON bristle brush to remove loose rust. Then paint it black if you want it to look nice.

What you don't want to do is cause the laminations to become electrically connected to each other. They have an insulating oxide layer on them that keeps them electrically isolated, and if you brush off the rust with a steel bristle brush, you might cause them to connect to each other which will increase hysteresis losses in the transformer.

 

[Old Punker]

If it really bugs you use a NYLON bristle brush to remove loose rust. Then paint it black if you want it to look nice.

What you don't want to do is cause the laminations to become electrically connected to each other. They have an insulating oxide layer on them that keeps them electrically isolated, and if you brush off the rust with a steel bristle brush, you might cause them to connect to each other which will increase hysteresis losses in the transformer.

Had to look that one up...