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3. Electrolytic pickling
This type of pickling is generally used on stainless steels, which are continuously treated (strip). The principle is simple: the product to be pickled is subjected to anodic and/or cathodic polarization. The objectives are manifold:
accelerated proton penetration of the oxide layer (under the effect of the electric field),
reduction of "higher" oxides (calamines) to iron protoxide,
action of gaseous evolution (oxygen + hydrogen) at the metal interface, resulting from alternating anodic and cathodic polarization, and promoting desquamation of the scale layer,
better control of stripping conditions,
productivity gains
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Electrolytic pickling
Demetallization or stripping of coated materials
Bibliography
Standards and norms
- Les équipements de protection individuelle (EPI). Règles d'utilisation INRS. - ED 6077 - 2013
Regulations
Arrêté ministériel du 30 juin 2006 relatif aux prescriptions générales applicables aux installations relevant du régime de l'autorisation au titre de la rubrique 3260 de la nomenclature des installations classées pour la protection de l'environnement – JORF n° 205 du 5 septembre 2006.
REACH regulation, Registration, Evaluation, Authorization and Restriction of Chemicals (regulation no. 1907/2006)...
Patents
German patent No. 1061151
European Patent EP 2438210B1 – 11.04.2012 – Method for regenerating a solution used for pickling or chemically milling titanium – Cros C. and Bares P. – Airbus operating SAS and Mecaprotec Ind.
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