Carbonation of Mg powder to enhance the corrosion resistance of Mg-rich primers

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• 作者：Shashi S. Pathak ; Michael D. Blanton ; Sharathkumar K. Mendon ; James W. Rawlins
• 关键词：A. Magnesium ; B. SEM ; B. XRD ; C. Atmospheric corrosion ; C. Paint coatings
• 刊名：Corrosion Science
• 出版年：2010
• 出版时间：November 2010
• 年：2010
• 卷：52
• 期：11
• 页码：3782-3792
• 全文大小：2542 K

文摘

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 CO₂ 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.