Bath for chemical polishing of steel surfaces

C - Chemistry – Metallurgy – 09 – K

Patent

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149/19

C09K 13/06 (2006.01) C23F 3/06 (2006.01)

Patent

CA 1153675

PRECIS DE LA DIVULGATION: L'invention concerne un bain pour le polissage chimique de surfaces en acier. Le bain comprend, en solution aqueuse, d'une part un mélange (1-6N) d'acides phosphorique, chlorhydrique et nitrique dont les normalités, divisées par la normalité globale du mélange, sont respecti- vement comprises entre 0,05 et 0,80, 0,15 et 0,90, 0,001 et 0,80 et, d'autre part, un éther de cellulose, du chlorure d'alkylpyridinium et de l'acide sulfosalicylique dont les concentrations (g/l) sont respectivement comprises entre 0,3 et 0,7, 0,15 et 0,45, 0,15 et 0,40 fois la norma- lité du mélange d'acides. Le bain s'applique notamment au polissage chimique de surfaces en acier allié au chrome et au nickel.

352610

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