New composite protects from corrosion at high mechanical stress

June 11, 2014
New composite coatings prevent corrosion caused by splash water or dirt; Source: Uwe Bellhäuser

Material researchers at the INM – Leibniz Institute for New Materials will be presenting a composite material which prevents metal corrosion in an environmentally friendly way, even under extreme conditions. It can be used wherever metals are exposed to severe weather conditions, aggressive gases, media containing salt, heavy wear or high pressures.

The INM from Saarbruecken will be one of the few German research institutions at the TechConnect World trade fair on 16 and 17 June in Washington DC, USA, where it will be presenting this and other results. Working in cooperation with the VDI Association of German Engineers it will be showcasing its latest developments at Stand 301 in the German Area.

"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.

The composite can be applied by spraying or other commonly used wet chemistry processes and cures at 150-200°C. It is suitable for steels, metal alloys and metals such as aluminum, magnesium and copper, and can be used to coat any shape of plates, pipes, gear wheels, tools or machine parts. The specially formulated mixture contains a solvent, a binder and nanoscale and platelet-like particles; it does not contain chromium VI or other heavy metals.

Explore further: Anti-microbial coatings with a long-term effect for surfaces

Related Stories

Anti-microbial coatings with a long-term effect for surfaces

June 10, 2014

Researchers at the INM – Leibniz Institute for New Materials have now produced antimicrobial abrasion-resistant coatings with both silver and copper colloids with a long-term effect that kill germs reliably and at the same ...

Ultra-high-strength metamaterial developed using graphene

August 26, 2013

New metamaterial has been developed exhibiting hundreds of times greater strength than pure metals. Researchers from KAIST have developed a composite nanomaterial. The nanomaterial consists of graphene inserted in copper ...

Skin with high rust protection factor

June 4, 2014

In industrialized countries, corrosion guzzles up to 4 percent of economic performance annually. Substances that protect metals effectively from its ravages are often damaging to the environment or have other disadvantages. ...

Graphene is thinnest known anti-corrosion coating

February 22, 2012

New research has established the "miracle material" called graphene as the world's thinnest known coating for protecting metals against corrosion. Their study on this potential new use of graphene appears in ACS Nano.

Recommended for you

Researchers develop eco-friendly, 4-in-1 catalyst

April 24, 2017

Brown University researchers have developed a new composite catalyst that can perform four separate chemical reactions in sequential order and in one container to produce compounds useful in making a wide range of pharmaceutical ...

Simple technique produces stronger polymers

April 24, 2017

Plastic, rubber, and many other useful materials are made of polymers—long chains arranged in a cross-linked network. At the molecular level, these polymer networks contain structural flaws that weaken them.

From abundant hydrocarbons to rare spin liquids

April 24, 2017

Fuel such as petrol is made up of hydrocarbons—a family of molecules consisting entirely of carbon and hydrogen. Pigment and dye, coal and tar are made up of hydrocarbons too.

Wood filter removes toxic dye from water

April 24, 2017

Engineers at the University of Maryland have developed a new use for wood: to filter water. Liangbing Hu of the Energy Research Center and his colleagues added nanoparticles to wood, then used it to filter toxic dyes from ...

Tiny 'cages' could keep vaccines safe at high temperatures

April 24, 2017

Vaccines and antibodies could be transported and stored without refrigeration by capturing them in tiny silica 'cages', a discovery which could make getting vital medicines to remote or dangerous places much easier, cheaper ...

0 comments

Please sign in to add a comment. Registration is free, and takes less than a minute. Read more

Click here to reset your password.
Sign in to get notified via email when new comments are made.