Session 6: Protective Coatings
Chair: Prof. Robert Akid, Hallam Sheffield University, GBThis session puts a focus on protective coatings for anti-corrosion uses. As legislation and customer demands force the industry to replace chromium and reduce solvents in anti-corrosive coatings, a lot of solutions have been developed. A new eco-friendly corrosion inhibitor for universal use as well as an outdoor and accelerated testing of Mg-rich primers for chromate-free corrosion protection of aerospace alloys will be presented. Other subjects are pigment grade corrosion inhibitors and sol-gel technology.
| << Previous Session | Next Session >> |
Monday Afternoon 15.00 – 17.00 h
Room St. Petersburg
| 6.2 15.00 – 15.30 h New eco-friendly corrosion inhibitor for universal use Xavier Llovensá, Nubiola Inorganic Pigments, ES This paper presents a new technology to produce a non-toxic Zinc free anticorrosive pigment. It is based on active nano particles deposited on an inert surface and it is designed for obtaining positive synergies and achieving high anticorrosion protection. The presentation compares the anticorrosion performance in different binders of a new eco friendly pigment vs. the standard and commoditized Zinc Phosphate. It shows in both water and solvent borne systems, how anti-corrosion protection improves. Besides, no hazardous warning label is required at all.  15.30 – 16.00 h Networking: Refreshments & Coffee Break | ||
| 6.3 16.00 – 16.30 h Hybrid sol-gel corrosion inhibitors: A novel approach to corrosion inhibitors for coatings Dr. Tony Gichuhi, Halox, US Corrosion inhibitors provide an indispensable function to protective coatings. Heavy metal based corrosion inhibitors were widely acclaimed as the best materials to provide corrosion protection to coatings. The performance of a coating under corrosive conditions requires that corrosion inhibitors provide sustainable protection during the coatings lifetime. Today, the industry is challenged to be more conscious of the impact toxic metals have on human health and other ecosystems. Sol-gel technology offers an eco-friendly alternative to the use of toxic metals (Cr, Cd, Pb, Zn). This paper highlights research in new sol-gel based corrosion inhibitors for use in paint as well as for use in the pre-treatment of bare metals (steel, aluminum, silver). Sol-gel technology particularly affords superior corrosion protection in thin film coatings (< 25 microns dry). This technology is applicable to water- and solvent-borne finishes, high gloss direct-to-metal coatings, conventional primers, acrylic clear coats, fast drying lacquers, wash primers, anti-fingerprint and conversion coatings. | ||
| 6.4 16.30 – 17.00 h Self-healing corrosion protection through sol-gel technology Dr. Luca Prezzi, SAFE Marine Nanotechnologies, IT Today’s steel surface technology is still based on concepts that date back into the 20th century and includes metallic (galvanized steel), inorganic oxides layers (phosphates, chromates) or other weldable primers. Such layers are applied in industrial conditions and many layers are needed to overcome the problem of pinholes and pores. Today’s surface technology is optimized for given substrates and involves difficult multiple layer applications as well as hazardous chemistry without taking advantage of those reactions that lead to the destruction of the interface. In the present study it was shown that the presence of molybdates in organic-inorganic hybrid networks allows the entrapped “doping anions” to be released at a controlled rate. When such materials are used as coatings for ferrous metal substrates the molybdate anions migrate to the interface coating-metal providing an enhanced mechanism for the passivation of the metal substrate tough including self-reparing features into the polymeric network. | ||
| << Previous Session | Next Session >> |
