CONTINUOUS COIL PRETREATMENT PROCESS

• Main Authors: BULL, MICHAEL, MACFARLANE, THERESA ELIZABETH
• Format: Patent
• Language: English; French
• Published: 16.06.2020
• Subjects: CHEMICAL SURFACE TREATMENT; CHEMISTRY; CLEANING OR DEGREASING OF METALLIC MATERIAL BY CHEMICALMETHODS OTHER THAN ELECTROLYSIS; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY IONIMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING MATERIAL WITH METALLIC MATERIAL; COATING METALLIC MATERIAL; DIFFUSION TREATMENT OF METALLIC MATERIAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL; METALLURGY; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLICMATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASSC23 AND AT LEAST ONEPROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25; NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION

Described herein is a continuous coil pretreatment process used to treat the surface of an aluminum alloy sheet or coil for subsequent deposition of an acidic organophosphorus compound. The process can include applying a cleaner to a surface of an aluminum sheet or a coil; etching the surface of the aluminum sheet or the coil with an acidic solution; rinsing the surface of the aluminum sheet or the coil with deionized water; applying to the surface of the aluminum sheet or the coil a solution of an acidic organophosphorus compound; rinsing the surface of the aluminum sheet or the coil with deionized water; and drying the surface of the aluminum sheet or the coil. L'invention concerne un procédé de prétraitement de bobine continue utilisé pour traiter la surface d'une feuille d'alliage d'aluminium ou d'une bobine pour permettre un dépôt ultérieur d'un composé organophosphoré acide. Le procédé peut consister à appliquer un agent nettoyant sur une surface d'une feuille d'aluminium ou d'une bobine ; graver la surface de la feuille d'aluminium ou de la bobine avec une solution acide ; rincer la surface de la feuille d'aluminium ou de la bobine avec de l'eau déionisée ; appliquer sur la surface de la feuille d'aluminium ou de la bobine une solution d'un composé organophosphoré acide ; rincer la surface de la feuille d'aluminium ou de la bobine avec de l'eau déionisée ; et sécher la surface de la feuille d'aluminium ou de la bobine.