Smart coating for metal surfaces significant change

May 5, 2021

Corrosion and corrosion protection represent one of the biggest challenges in all worldwide industries and therefore, corrosion-resistant coatings and their development are critical for the protection of metals and metallic components.

Metal constructions, machines, pipelines, tanks, and similar equipment are all in danger of suffering from corrosion effects unless they are regularly controlled and maintained. Metals and metallic structures can be protected from corrosion in many ways such as using corrosion inhibitors, cathodic protection, and protective coatings.innovative and new smart nano-based coatings are being extensively used for many reasons. They protect the surface against corrosion and contamination. The main goal of the coating improvement was to increase the adhesion and coating capacity as well as to reduce the coating permeability and water uptake also to create a complete corrosion resistance film coating and ultimately to commercialize the coating(Eternal).

The polyaspartic coating polymer base was improved by adding nanosilica. The coating film formed by a reaction between the polyaspartic ester and an aliphatic polyisocyanate as a crosslinker is highly stable, hard, and extremely resistant against weathering and abrasion. One of the important materials in the chemical structure of the polyaspartic coating was nano SiO2 modified with amino groups, with a diameter of 10–20 nm. polyaspartic coating (Eternal) is applied directly to the carbon steel surface in a thin layer showed excellent protection against chemical and mechanical damages. according to the test results, Eternal reduces the number of layers to be applied compared to the conventional coating systems, has high resistance, ultra-low volatile organic compound (VOC) content, and consequently reduces maintenance costs and environmental impact of the coating process. high coating impedance (>10E9 Ωcm2) was retained throughout the period of 10704 h of exposure to 3% NaCl solution. so, the results indicate that using nanosilica with other suitable pigments and additives in the coating formulation provides a resilient coating with good prospects of attaining a long lifetime.

The comparison results of Eternal with the conventional protective coating systems for highly corrosive environments such as marine splash zones were demonstrated. there is a huge difference in the results. these results prove that this coating could improve its structure and the aging rate is completely controlled. The result of this project has been published in the scientific journal Acta Chimica Slovenica (DOI: 10.17344/acsi.2018.4187).

Dr. Arezoo Assarian who has innovated the coating (Eternal) has accomplished her research project and demonstration in the research and development department at Eninco Engineering B.V. based in the Netherlands. Dr. Assarian’s main goal is to transfer new technology to the protective coating industries, to produce high-quality coatings that could be available in the market, and to create a new generation of coatings with high performance and efficiency. she hopes that the new technology will significantly reduce the damages to the environment caused by using the chemical materials.

This innovation can be used to reduce corrosion costs and increase the protection of metal surfaces in drilling oil, shipbuilding, platforms, metal construction, power plants, petrochemicals, pipeline transmission lines, and all heavy-duty industries.


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