Process for removing phosphosilicate coatings

Cleaning and liquid contact with solids – Processes – For metallic – siliceous – or calcareous basework – including...

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134 42, B08B 308

Patent

active

040100421

ABSTRACT:
A phosphosilicate coating is removed from a metallic substrate by contacting the coating with an aqueous solution containing an alkali metal fluoride. The solution is maintained in contact with the coating for a time sufficient to remove the coating without harming the substrate.

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patent: 3642549 (1972-02-01), Couture et al.
patent: 3703419 (1972-11-01), Esler et al.
patent: 3798074 (1974-03-01), Esler et al.

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