Periodic Reporting for period 1 - EcoGemCoat (Smart anticorrosion coatings based on nanocontainers loaded with novel, eco-friendly cationic gemini surfactants as efficient corrosion inhibitors for carbon steel in seawater.)
Reporting period: 2018-09-03 to 2020-09-02
Corrosion inhibitors are chemical compounds which can prevent corrosion of metals. Entrapping them in nanocontainers and afterwards incorporating the loaded nanomaterials into protective functional coatings (smart coatings) can lead to a more effective, long-lasting corrosion protection.
In this context, EcoGemCoat project aimed at the development of smart anticorrosion coatings based on nanocontainers loaded with corrosion inhibitors for carbon steel with a potential application in marine and offshore industry.
The overall objectives of the project were:
• Preparation of inhibitors;
• Testing of inhibitors;
• Preparation of smart coatings;
• Corrosion, mechanical and environmental test of coatings;
• Gaining new skills and developing researcher’s career;
• Dissemination and communication of the project results.
The main results of EcoGemCoat are as follows:
• Ecotoxicity tests of the synthesised gemini surfactants towards marine microorganisms were obtained (WP 2). The tests showed that cationic gemini surfactants are less toxic than the monomeric surfactant CTAB and that they can be a more environmentally friendly substitute in various applications.
• The synthesised corrosion inhibitors (gemini surfactants) were tested in order to prevent corrosion of carbon steel in sodium chloride solution (WP 2). The tests showed that they are not the most effective, but their inhibition efficiency (IE) is 20% higher than IE for the monomeric surfactant DTAC.
• Novel gemini surfactant-based silica nanocapsules (Si_QSB) with lower toxicity were successfully synthesised and characterised (WP 3).
• Replacement of CTAB, which is commonly used as a template surfactant for silica nanocapsules synthesis, with less toxic gemini surfactant QSB2-12 is consistent with Safe-by-Design approaches for the synthesis of functional nanomaterials (WP 3).
• Ecotoxicity tests of coatings with free corrosion inhibitor (QSB2-12) and novel silica nanocapsules (Si_QSB) incorporated were carried out (WP 4).
• Development of the Fellow’s career which included gaining new skills, participation in conferences and a winter school, teaching activities at the University of Aveiro, supervision activities, writing scientific publications and grant proposals, project management and communications activities, was achieved.
The project results were presented in 3 international conferences (one presentation was awarded with Best oral presentation prize), published in scientific journals and conference proceedings, as well as presented to research groups (University of Aveiro and University of Manchester) during seminars. Communication to general public included participation and organization of workshops, webinars, exhibitions and an open lab day. News about EcoGemCoat progress were also spread on social media (Facebook and Twitter).
All the communication activities undertaken in the frame of the project supported an investment in education and spreading information about corrosion and its detrimental impact. Additionally, the workshop organised for Polish children living in Portugal supports the respect for Polish language and promotes interculturality.