Material and manufacturing process produces corrosion inhibitor “comparable to chromate”

Corrosion inhibitors have a variety of applications and are commonly used to coat and protect steel products. To date, hexavalent chromate has been commonly applied as a common corrosion inhibitor, but will be prohibited in the EU from 2019.

The Swansea team’s breakthrough is applicable to coated steel products, and their efforts have been rewarded with the £25,000 Materials Science Venture Prize from The Worshipful Company of Armourers and Brasiers.

The new innovation contains a stored reservoir of corrosion inhibitor that works by channeling electrolyte anions into the coating, triggering the release of the inhibitor. The product has been tested with salt spray, the standard test for corrosion, outperforming hexavalent chromate.

“We believe we are well ahead of other chrome-free products,” said Dr Adrian Walters, IP & Project Manager, SPECIFIC IKC, an academic and industrial consortium led by Swansea University. “We have tested the leading competing products and none perform nearly as well as our product, which is comparable to chromate in performance and price.”