An academic research institution from Bulgaria, with a strong background in organic chemistry and interdisciplinary research, has developed heavy duty hybrid zinc coatings of significantly superior corrosion resistance to standard coatings.
Zinc coatings contain galvanic deposits of polyaniline nanoparticles, where the polyaniline is deposited concomitantly with the zinc in standard galvanic baths. The presence of polyaniline, which alone is a potent corrosion inhibitor itself, leads to a significant increase in the corrosion resistance of the coatings. For example, in 5% NaCl in water solution a standard zinc coating is destroyed within 25 days, while the hybrid coating endures more than 65 days. Despite its organic nature, polyaniline is resistant to high temperatures and UV radiation, and the presence of polyaniline particles in the hybrid zinc coatings has no adverse impact on its mechanical properties.
A novel method for producing such coating was developed, allowing one-step process of obtaining the hybrid coating. Suitably formulated polyaniline is added to a slightly acidic electrolyte for zinc deposition, which allows the organic particles to be deposited simultaneously with the zinc, with the process run in a standard galvanic bath, without additional equipment required.
The team is looking for international partners in order to disseminate and/or improve the developed solution. Commercial agreements with technical assistance are sought under which acquisition (transfer) of the composition of the proposed electrolyte for the galvanic deposition of the hybrid coatings, and the detailed technical parameters, included in this know-how is envisaged, supported by technical consultancy by the developer for its efficient use. It is also possible to conclude other types of contracts depending on the need of the potential partner and the negotiations, e.g. research cooperation agreement.