Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1471017 | Corrosion Science | 2010 | 11 Pages |
Abstract
Magnesium-rich primers perform very well on outdoor exposure and actual test conditions, yet fail rapidly in accelerated corrosion testing (salt spray test – ASTM B117). To investigate the behavioral dichotomy, Mg-rich primers exposed to salt spray testing and natural weathering were characterized at periodic intervals. The results revealed the presence of a thin and porous magnesium hydroxide layer in primers exposed to salt spray, and in natural exposure, a thicker, protective magnesium carbonate layer was detected and characterized. Samples exposed to atmospheric carbon dioxide exhibit excellent corrosion resistance but salt spray conditions are not conducive to facilitate magnesium carbonate formation.
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
Shashi S. Pathak, Michael D. Blanton, Sharathkumar K. Mendon, James W. Rawlins,