5. Hydrogen and paint stripping
In the course of its metallurgical history, during processing and in use, a metallic material such as steel is subjected to various sources of hydrogen. For the record, a "finished" part has undergone hydrogen-generating chemical and/or electrolytic treatments during its transformation. While the volume of hydrogen produced can be reduced, it cannot be totally avoided during so-called "preparation" chemical and/or electrolytic treatments, such as cathodic degreasing or acid pickling, nor during any subsequent electroplating or conversion phase. Consideration of the preparation sequence shows that anodic alkaline degreasing, between acid pickling and electroplating proper, oxidizes the hydrogen occluded in the subsurface after pickling, thereby minimizing metal sensitivity prior to deposition.
Hydrogen-steel interaction can cause significant material degradation...
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Hydrogen and paint stripping
Health and safety – Effluent treatment
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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