Corrosion inhibitors are commonly used in a wide range of sectors, including: coated steel products used to construct industrial, commercial and other buildings; aerospace and aircraft; and the car industry. The new method involves a stored reservoir of corrosion inhibitor. It works by channelling aggressive electrolyte anions into the coating, triggering the release of the inhibitor ‘on demand’, thus preventing corrosion.
The product has been tested with salt spray, the standard test for corrosion, outperforming hexavalent chromate.
Hexigone used a scanning Kelvin probe, specially built by the team, which can detect the state of the metal beneath a coating without touching it. This allowed them to test different products much more quickly, with each test taking around 24 hours, rather than 500 hours as was previously the case.