Corrosion of Type 347 Stainless Steel in the Uranium-Derby Pickle Bath
Description:
Abstract: In one of the final stages of the process at the Mallinckrodt Uranium Refining Center, a 45 per cent nitric acid solution at about 170 F is used to pickle the calcined magnesium fluoride scale off the uranium derbies. The increase in the fluoride-ion content of the bath tends to promote corrosion of the Type 347 stainless tanks. This attack becomes excessive if 0.3 g/liter of fluoride ion or more is present. It was found that if aluminum ion is added to the solution the corrosiveness …
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Date:
July 14, 1954
Creator:
Peoples, R. S.; Fink, F. W.; Stewart, O. M. & Braun, W. J.