Self-healing nanotechnology anticorrosion coatings as alternative to toxic chromium

28 Juli 2008

Remember the movie blockbuster Erin Brockovich? The film is based on a real world legal case that revolves around hexavalent chromium, also known as chromium (VI), used by the Pacific Gas and Electric Company (PG&E) to control corrosion in cooling towers in its Hinkley, CA compressor station. Chromium (VI), a natural metal, is known to be toxic and is recognized as a human carcinogen via inhalation. 

Researchers in Germany now have developed a novel method of multilayer anticorrosion protection including the surface pre-treatment by sonication and deposition of polyelectrolytes and inhibitors. This method results in the formation of a smart polymer nanonetwork for environmentally friendly organic inhibitors.

 "Our novel coating exhibits very high resistance to corrosion attack, long term stability in aggressive media and an environmentally friendly, easy and economical preparation procedure," Dr. Daria Andreeva tells Nanowerk. "We have demonstrated the general procedure for a surface important for the aircraft industry but it is similarly applicable for many types of surfaces, thus enabling many applications in advanced technologies."

By Michael Berger. Copyright 2008 Nanowerk LLC

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