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Old 24th May 2018, 08:36 PM   #24
Fernando K
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Join Date: Apr 2010
Posts: 663
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Hello everyone

The only way to remove the oxide is the electrolysis and the zinc-soda method, without attacking the base metal (iron or steel). It is the method used in the museums (besides the ultra-sound) and in the objects recovered from the sea

Affectionately. Fernando
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