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Read the articleAUTHORS
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Marie-Pierre GIGANDET: Senior Lecturer at the University of Franche-Comté - Member of Institut des traitements de surface de Franche-Comté - Laboratoire de Chimie des Matériaux et Interfaces (LCMI) - Corrosion, surface treatment and electrochemical systems cluster - Université de Franche-Comté
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Lionel THIERY: Head of Research and DevelopmentCoventya SAS, Clichy
INTRODUCTION
Hexavalent chromium-based conversion coatings have been used for over 60 years for their excellent anti-corrosion properties, particularly for galvanized steel systems, and also for their excellent paint adhesion.
However, for reasons of environmental and human protection, these treatments are set to disappear. More or less interesting substitutes are emerging, but are still at the laboratory research stage, while others, such as trivalent chromium, are now being industrialized. These multiple avenues are in full development and will enable hexavalent chromium to be replaced in the next few years.
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Hexavalent chromium-free conversion treatments
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