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C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
C23F1/00—Etching metallic material by chemical means
C23F1/46—Regeneration of etching compositions
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Chemical & Material Sciences
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Chemical Kinetics & Catalysis
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General Chemical & Material Sciences
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Engineering & Computer Science
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Materials Engineering
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Mechanical Engineering
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Metallurgy
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Organic Chemistry
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Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals
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Procede de purification de solutions contenant des carbonate, sulfate, eventuellement hydroxyde de sodium ou potassium, ainsi que l'un au moins des metaux, vanadium, uranium, molybdene