Panorama Technology,es
In order to minimize metal corrosion rate are used organic coatings and inorganic, whose key strategy is based on a physical barrier, but efficiency is compromised by exposure time, as aggressive agents penetrate through the pores and defective areas of the coating. To increase corrosion protection, inhibitors are added. However, Direct addition of corrosion inhibitors in coating matrix can lead to degradation of coating, The inactivation of the inhibitor, and a quick release inhibitor, if the inhibitor is soluble.
Technology Description
The present invention describes the production of corrosion inhibitor reservoirs based on encapsulation via sol-gel process of polyphenolic compounds., such as tannins and anthocyanins. Specifically, the present invention comprises a process for producing reservoirs of corrosion inhibitors based on encapsulation via sol-gel process of polyphenolic compounds that allows the maintenance of the characteristics of polyphenolic compounds, for use in coating to protect against corrosion, capable of reducing or delaying the advancement of corrosion on metal surfaces where its effect can be seen. The present invention is located in the fields of Engineering and Chemistry.
Problem solved
The invention provides an improvement in protection against corrosion of metal surfaces due to the incorporation of reservoirs of corrosion inhibitors produced by the sol-gel process with silica precursors. These reservoirs are obtained through a simple and fast synthesis process that is easy to implement industrially.
Applications
The main application of this technology is to reduce or delay the advancement of corrosion on metal surfaces where its effect can be seen.. Furthermore, the material produced is applicable for systems that require a controlled release, such as oral drugs, coated biomedical devices, dispersion agent for delivery to target molecules agriculture, various toiletries and food products, materials and biocides / or pest resistant, antibacterial coatings / antiviral, which are not included in the examples.
Advantages
The main advantage of the present invention is to provide corrosion inhibitor storage materials that are low cost and easily produced.. These storage materials, By being based on silica and derivatives, They have high surface area and porosity, ensuring release of corrosion inhibitors in the coatings formed on the metal surface and, subsequent diffusion into the water and electrolytes to penetrate the coatings, thereby promoting uniform distribution of the inhibitor throughout the metal surface. Depending on the properties of the silica matrix, the release of corrosion inhibitor is relatively fast. A controlled release system is important to facilitate the release of the inhibitor at a desired rate and extend the corrosion protection. Such storage materials can become delivery systems for controlled chemical and physical changes in the silica matrix, and using substances that interact with the corrosion inhibitors to delay its release.
Technology Readiness Level (TRL – Technology Readiness Level)
Status and opportunity
Patent published by INPI under application number BR 10 2019 003038-0.
The patent can be found in full at Lume bylink.
Inventors
João Henrique dos Santos Zimnoch
Viviane Dalmoro
Cristiane Santos
