hello
On the subject of the oxidation of iron (or steel) we must attend to what they say chemicals, not what they say people with the best intentions, but wrong
The oxide is a foreign body in the iron surface, t promotes further oxidation. No passive oxide,. but in the hidden, still working, slowly and without apuroo
Any attack with acid for it to be softer (boric) also attacks the metal.
When we look at a rusty piece, and we feel that this motionless, rust still working below What happens is that the process is slow, but not 100 or 200 years, everything was reduced to dust
Two metos that do not attack the metal, reduce rust and so prevent
subsequent oxidation are electrolysis and zinc-soda method. It is the method used in the sea salvage iron and recommended by Museologists
Affectionately. Fernando K
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