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Comment Operations & Maintenance

Cr-free coatings

By Chemical Engineering |

A new primer technology for coating aluminum aircraft that uses magnesium instead of chromium has been developed by researchers at the North Dakota State University (Fargo; edlinks.chemengonline.com/5618-546). A commercial licensing agreement was signed last month between the university’s Research Foundation and the Aerospace Coatings business of Akzo Nobel N.V. (Arnhem, Netherlands; edlinks.chemengonline.com/6518-547), the first company to develop products incorporating the technology.

Although chromate-free primers have been around for many years, none provided the anticorrosive properties of chromate. In laboratory tests, the corrosion-inhibiting ability of NDSU’s magnesium-based system was comparable to chromate, according to Akzo Nobel.

 

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