Wednesday, December 10, 2008

Now, chromium-free coatings to protect cars against rust

A new chromium-free coating can help protect cars against rust, reveals new study.
Researchers at the Fraunhofer Institutes for Silicate Research ISC in W├╝rzburg and for Machine Tools and Forming Technology IWU in Chemnitz, developed an alternative anti-corrosion method based on nanocomposites as against the long-standing chromium plating prohibited since 2007.
The boffins along with colleagues at the Institute for Corrosion Protection Dresden GmbH had submerged steel sheets into a coating sol, applied a power coating and exposed them to various tests to produce the new nanomaterials.
While the steel sheets were kept in a chamber filled with atomized brine for 360 hours, or 15 days, at a temperature of 35 degrees, the metal sheets had also been placed in an environment chamber with a relative humidity of 100 percent for 240 hours, or 10 days.
ISC project manager Dr. Johanna Kron said: “These coatings protect most galvanized materials almost as well as commercial yellow chrome plating. Indeed, the new coatings are often even more effective than the chromium-free system and chromium(III) passivation currently on the market.”
The study also found that the chromium-free coated metal sheets, which were less than a thousandth of a millimeter thick, could be formed in exactly the same way as yellow chrome plated sheets.
Kron revealed that the corrosion-proofing system could be expected to hit the market in around five years. (ANI)

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