Hello all, I am building some custom output transformers from old iron. It is slightly rusty, is it worth removing, and if so, any recommendations on best way. Preferably without sanding.
Thanks for any feed back.
Jason
Thanks for any feed back.
Jason
I've used a wire brush, then a coat of phosphate rust converter, followed by a second coat of same or a coat of spray paint
^ Absolutely true! In addition, rust means bulging, the lams' total volume increases, you'll expect issues while packing the correct number of lams into the bobbin.
OTOH, just surface rust on a complete lamination stack isn't any problem at all, electrically spoken.
Best regards!
OTOH, just surface rust on a complete lamination stack isn't any problem at all, electrically spoken.
Best regards!
Thanks!
Due to it's high content of phosphoric acid, Coca Cola is said to be an excellent rust remover also. Anyway, due to it's even higher content of sugar the hygroscopic residues call for just more rust...
Best regards!
Due to it's high content of phosphoric acid, Coca Cola is said to be an excellent rust remover also. Anyway, due to it's even higher content of sugar the hygroscopic residues call for just more rust...
Best regards!
...btw, stolen from another thread:
Best regards!
Best regards!
OT laminations need to have an insulating layer/coating at least on one side to avoid eddy currents.
If you remove the rust you'll likely remove the coating.
If you remove the rust you'll likely remove the coating.
Years ago i welded pipes of all sorts and sizes, they were black steel, after welding i put the pipes into large vessels containing heated acid off sorts, after 24 hours they were totally clean and shipped of to galvanization
Yeah maybe I'll strip them, vinegar. Then dip in a lacquer, or something very thin? Would also prevent future rust.
Vinegar is an acid and acids cause corrosion.
So the vinegar treatment should be followed by a neutralising bath in water dissolved baking soda before lacquering.
So the vinegar treatment should be followed by a neutralising bath in water dissolved baking soda before lacquering.
The solution is vinegar 😁.
Jokes aside, is vinegar low enough in ph ? Sulfuric acid or phosphorus solution, phosphorus solution turns rust into a black coating that prevents rust.
Jokes aside, is vinegar low enough in ph ? Sulfuric acid or phosphorus solution, phosphorus solution turns rust into a black coating that prevents rust.
Vinegar ( = diluted acetic acid) is known to attack a number of metals and cause corrosion.
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True, hopefully attacking the rust first. Then neutralize and treat for corrosion. The vinegar is acting very slowly, which is good, but its quite a bit of surface area. I wonder if black oxide would be a good idea? And another question, does the hardness of the material change its sound? I could easily harden the plates to any hardness. Soft, to tool steal.