Carbonation of Mg Powder to Enhance the Corrosion Resistance of Mg-Rich Primers

• Main Authors: Pathak, Shashi S., Blanton, Michael D., Mendon, Sharathkumar K., Rawlins, James W.
• Format: Text
• Language: unknown
• Published: The Aquila Digital Community 2010
• Subjects: Magnesium; SEM; XRD; Atmospheric corrosion; Paint Coatings; Chemistry; Physical Sciences and Mathematics; Carbonic acid
• Online Access: https://aquila.usm.edu/fac_pubs/988; http://logon.lynx.lib.usm.edu/login?url=http://ac.els-cdn.com/S0010938X10003823/1-s2.0-S0010938X10003823-main.pdf?_tid=744c655a-8d9f-11e2-923e-00000aab0f6b&acdnat=1363372856_fe6f7aab5b3ccf37ebd6ea38514b6660

This paper is a continuation of our investigation into the characteristic dichotomy of Mg-rich primers between accelerated salt-fog testing and natural weathering. Our earlier study suggested that magnesium powder reacted with atmospheric CO(2) to form a protective carbonate layer on its surface. In this study, magnesium powder was treated with aqueous carbonic acid to accelerate magnesium carbonate development. The treated magnesium powder was formulated into a Mg-rich primer and evaluated for its corrosion resistance. The Mg-rich primer formulated with the treated Mg powder performed better in the salt-fog test than the control primer based on untreated Mg powder. (C) 2010 Elsevier Ltd. All rights reserved.