A new composite material which prevents metal corrosion in an environmentally friendly way, even under extreme conditions is presented. It can be used wherever metals are exposed to severe weather conditions, aggressive gases, media containing salt, heavy wear or high pressures.
The researchers from the INM- Leibniz Institute for New Materials will be presenting their results at the International Nanotechnology Exhibition and Conference nano tech 2015, Tokyo, Japan.
“This patented composite exhibits its action by spray application”, explains Carsten Becker-Willinger, Head of the Nanomers Program Division. “The key is the structuring of this layer – the protective particles arrange themselves like roof tiles. As in a wall, several layers of particles are placed on top of each other in an offset arrangement; the result is a self-organized, highly structured barrier”, says the chemical nanotechnology expert. The protective layer is just a few micrometers thick and prevents penetration by gases and electrolytes. It provides protection against corrosion caused by aggressive aqueous solutions, including for example salt solutions such as salt spray on roads and seawater, or aqueous acids such as acid rain. The protective layer is an effective barrier, even against corrosive gases or under pressure.
After thermal curing, the composite adheres to the metal substrate, is abrasion-stable and impact-resistant. As a result, it can withstand high mechanical stress. The coating passes the falling ball test with a steel hemispherical ball weighing 1.5 kg from a height of one meter without chipping or breaking and exhibits only slight deformation, which means that the new material can be used even in the presence of sand or mineral dust without wear and tear.
Read more: New composite protects from corrosion at high mechanical stress
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