Forum für Wissenschaft, Industrie und Wirtschaft

Hauptsponsoren:     3M 


New Corrosion-resistant Polymers Developed to Replace Chromates


A new group of non-toxic, corrosion-resistant polymers developed by University of Rhode Island scientist Sze Yang will likely put a smile on the face of Erin Brockovich.

The polymers are designed as a replacement for chromates in paints and other coating systems. Chromates have been used commercially to protect metal from corrosion for 50 years but have recently been declared hazardous. Brockovich’s efforts to demonstrate that they caused widespread health problems in Hinckley, Cal. was made into the Academy Award-winning movie Erin Brockovich in 2000 starring Julia Roberts.

... mehr zu:
»Chromates »They

"There is now a worldwide push on to remove chromates because they are carcinogens," said Yang, a professor of chemistry and one of URI’s most prolific inventors. "Its use is gradually decreasing as replacements are found."

The new product is a two-strand, conducting polymer that can emulate the most important functions of chromates. Rather than serve as a barrier coating, which are ineffective when damaged by scratches, chromates and the new URI polymers inhibit the process of corrosion and are "self-healing." They promote the formation of a protective layer and therefore can resist scratch damage, pinholes, pitting, and stress cracking corrosion.

"Typical polymers are insulators, but conducting polymers allow electrons to move along the polymer chain," explained Yang, who collaborated on the research with Richard Brown, a URI professor of chemical engineering. "This ability to give and take electrons is essentially the same as what chromates do -- interrupt the electro-chemical process of corrosion formation."

Unlike other efforts to develop single-strand, corrosion-resistant conducting polymers, this low-cost polymer has a second strand that provides space for a variety of modifications to its physical structure, making it more malleable and adaptable for many application processes, including spraying, dipping or spin coating.

Major potential markets include coating of aluminum alloys for aircraft, aluminum and steel for the automotive industry, and concrete-reinforcing bars for bridges, highways and buildings. The polymers are effective as a low-cost, minor additive to paint, and can be soluble in commercial paint solvents and used in water-based epoxies. It also is effective for surface treatments, steel coil coating, and as a corrosion resistant primer under other resin-coating systems.

Corrosion is a chemical process that causes rust and the deterioration of metals and other materials. "We can usually see rust easily, but the bigger problem is the dangerous weakening effects of corrosion that we can’t see," Yang said.

In addition to their anti-corrosive properties, the new polymers are also effective as a coating to prevent the buildup of electrostatic charges. They can be used in a wide variety of ways, from surgical wards and computer chip "clean rooms" where static can interfere with operations and production, to applications on rugs, electrical appliances and many other products that naturally become charged with static electricity. They can be especially useful in operations where combustible materials are in use, as discharges of static in these circumstances can be a significant hazard.

Yang and Brown have been issued two patents and have four others pending on various versions of the new conducting polymers. Laboratory studies have been completed on the polymer syntheses, on some test coating formulations, and corrosion tests of coatings on aluminum and steel. With the research complete, the co-inventors are now seeking collaborators to commercialize the polymers.

| newswise
Weitere Informationen:

Weitere Berichte zu: Chromates They

Weitere Nachrichten aus der Kategorie Materialwissenschaften:

nachricht Gefühlvoll zupacken
16.03.2018 | Fraunhofer-Institut für Produktionstechnik und Automatisierung IPA

nachricht Schnelle Oberflächen
15.03.2018 | Max-Planck-Institut für Polymerforschung

Alle Nachrichten aus der Kategorie: Materialwissenschaften >>>

Die aktuellsten Pressemeldungen zum Suchbegriff Innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Bewegungskontrolle mit Fotopigmenten

Forscher der Universität Göttingen entdecken zusätzliche Funktion von Opsinen

Die Fotorezeptoren in den Augen von Tieren fangen Licht mithilfe von Fotopigmenten ein. Forscher der Universität Göttingen haben nun entdeckt, dass diese...

Im Focus: Locomotion control with photopigments

Researchers from Göttingen University discover additional function of opsins

Animal photoreceptors capture light with photopigments. Researchers from the University of Göttingen have now discovered that these photopigments fulfill an...

Im Focus: Neue Methode der Röntgenholographie

Röntgenholographie im Flug - Eine neue Methode der Röntgenholographie erzeugt Bilder von Partikeln in der Gasphase

Wissenschaftlerinnen und Wissenschaftler in der Arbeitsgruppe von Prof. Thomas Möller am Institut für Optik und Atomare Physik der TU Berlin ist es gemeinsam...

Im Focus: Surveying the Arctic: Tracking down carbon particles

Researchers embark on aerial campaign over Northeast Greenland

On 15 March, the AWI research aeroplane Polar 5 will depart for Greenland. Concentrating on the furthest northeast region of the island, an international team...

Im Focus: Unique Insights into the Antarctic Ice Shelf System

Data collected on ocean-ice interactions in the little-researched regions of the far south

The world’s second-largest ice shelf was the destination for a Polarstern expedition that ended in Punta Arenas, Chile on 14th March 2018. Oceanographers from...

Alle Focus-News des Innovations-reports >>>



Industrie & Wirtschaft

Ultraschneller Funk und Chip Design bei der DATE-Konferenz 2018 in Dresden

16.03.2018 | Veranstaltungen

Arktis, Antarktis und Hochgebirge unter Druck

16.03.2018 | Veranstaltungen

Internationale Spring-Campus-Konferenz an der Freien Universität Berlin vom 9. bis 13. April 2018

15.03.2018 | Veranstaltungen

Wissenschaft & Forschung
Weitere VideoLinks im Überblick >>>
Aktuelle Beiträge

Per Erbgut-Schalter Alzheimer aufhalten

16.03.2018 | Biowissenschaften Chemie

Mobiler Roboter pflegt Fassadenbegrünung

16.03.2018 | Biowissenschaften Chemie

UV-Kugel macht Lackieren einfach und schnell

16.03.2018 | Verfahrenstechnologie

Weitere B2B-VideoLinks
im innovations-report
in Kooperation mit academics