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Corrosion

Challanges

Corrosion is defined as the gradual deterioration of metallic materials and their properties, and occurs when the metal reacts with the surrounding environment to form rust or another chemical compound. In general, atmospheric air, humidity, rain, and aqueous solutions (chemical products) are the environments that are most frequently associated with corrosion problems.

Anticorrosive coatings are regularly used for protection against corrosion, humidity and fouling of installations, machinery and equipment. At a commercial level, there is a wide variety of anticorrosive coatings based on different additives and resins, their efficiency is generally associated with an increase in cost. However, the coatings still have low thermal and corrosion resistance and especially limited chemical resistance.

Common metal protection technologies include cathodic protection, corrosion inhibitor protection, metal coating and surface organic coating. These three methods have the problems of high cost of use, pollution to environment and limited application environment. The surface organic coating method is the most commonly used and effective metal protection method, which is to cover the metal surface with an organic protective film to avoid direct contact between the metal and the corrosive medium in the environment, so as to reduce the chance of chemical or electrochemical reaction of the metal.

However, a considerable part of the traditional organic coating contains toxic heavy metals such as chromate, lead and zinc, which has certain safety risks and environmental pollution risks. It not only consumes a large amount of non-renewable energy, but also is extremely unfavorable for the sustainable development of society and economy.

THE NEXT GENERATION ANTI CORROSIVE INGREDIENTS

Graphene is currently the most revolutionary nanotechnological additive in the coatings and paints industry. The incorporation of graphene as an additive in coatings produces coatings with extraordinary protection against corrosion. Graphene creates pathways that are very tortuous, preventing water and oxygen molecules and/or chemical agents from diffusing to the surface of metal-based materials, resulting in metal protection against oxidation and corrosion. Graphene effectively provides a barrier between the metal and oxygen due to its particulate size and surface area.

Finally, graphene strengthens the surface bond between the coating and the metal substrate. This system works together to help prevent any water particles from reaching the metal.

Coatings reinforced with Aerofen Graphene Based Products provide many performance and anti-corrosion benefits, including:

Higher performance than existing coating technologies on the market today Fewer applied coating layers are required for greater benefits Zinc reduction in formulations Chemical resistance

Graphene and graphene oxide-enhanced anticorrosive coatings will replace traditional zinc-based coatings, which have several drawbacks, such as short life, high content of volatile organic compounds (VOCs), slow curing, high cost, sedimentation in storage.

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