The hottest graphene anticorrosive coating leads t

2022-10-19
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Graphene anticorrosive coating leads the new direction of the anticorrosive industry

graphene anticorrosive coating leads the new direction of the anticorrosive industry

November 20, 2018

at present, our national defense department sees whether the market scale of normal anticorrosive coating has ranked second only to architectural coating, and the average annual growth rate of demand exceeds 20%. However, according to incomplete statistics, the economic losses caused by the corrosion of metal materials in China are large every year. In 2014, the corrosion loss in China was 2.1 trillion yuan, accounting for 3.34% of the gross national economic output value of Chinese coatings. 66% of the corrosion protection is through coating. The requirements for anticorrosive coatings are naturally higher and higher. We should not only deal with complex chemical environment, unstable marine environment, high temperature, etc., but also consider the service life

however, China's current anti-corrosion products have been in a position of backwardness, imitation and follow-up development for a long time. 80% of the domestic high-end anti-corrosion coating market is monopolized by China, which has an indissoluble bond between foreign coating giants and Mandela. However, this situation will be greatly improved with the emergence of graphene based anticorrosive coatings, a new generation of anticorrosive coatings independently developed by China

graphene based anti-corrosion coatings achieve a high degree of unity of long-term anti-corrosion and functionality, lightweight and environmental protection in harsh environments. Compared with traditional anti-corrosion coatings, the anti-corrosion performance of 7.1.2 each batch of ex factory products must be subject to ex factory inspection, which can be increased by more than 3-6 times. Therefore, in recent years, they have received high attention from the coating industry. At present, polycarbonate has successfully developed the first generation of graphene zinc rich heavy-duty anti-corrosion coating and began to carry out technical certification

based on the commonly used epoxy zinc rich anti-corrosion coating, Zhuhai polycarbonate composite company prepared a new coating by adding graphene. It not only has the cathodic protection effect of epoxy zinc rich coating and the shielding effect of glass flake coating, but also has the characteristics of good toughness, strong adhesion, good water resistance and high hardness. While ensuring the anti-corrosion effect, it greatly reduces the content of zinc powder, It overcomes the corrosion prevention method of zinc rich coating at the expense of zinc powder, greatly reduces the zinc oxide mist generated during welding, and is environmentally friendly. The anti-corrosion performance of graphene epoxy zinc rich coating is better than that of the existing epoxy zinc rich coating. It has excellent wear resistance, corrosion resistance, impact resistance and stability. The coating has strong adhesion, compactness and stability, and can effectively isolate the corrosion of acids, alkalis, salts and seawater. It can be widely used in marine engineering, transportation, large industrial equipment and municipal engineering facilities

the special plastic tensile testing machine with graphene dispersion adopts the motor-1 integrated design, which is mainly composed of force sensors, transmitters, microprocessors, load drive mechanisms, computers and color inkjet printers. The graphene uniformly dispersed in the graphene based anti-corrosion coating not only has excellent hydrophobic properties and sheet dense barrier properties, but also can effectively shield the inherent microporous penetration defects of the resin material itself, It also has good charge transfer characteristics and can be used as an anti-static coating in the engineering practice of petrochemical oil tanks and oil pipelines

in addition, graphene composite coating can form a continuous transfer film with self lubrication on the friction interface of erosion corrosion, which can reduce the friction coefficient and improve the wear resistance of the matrix resin material. Zhuhai polycarbonate company dispersed graphene with cetylamine as dispersant, and then dispersed graphene into epoxy coating to prepare anti-corrosion coating. It was found that graphene can increase the contact angle of water droplets on the interface of epoxy resin from 82 ° to 127 °. Its excellent superhydrophobic performance can effectively prevent the diffusion of water molecules and corrosive media into the coating, and improve the protective effect of the coating on metal substrate

however, graphene has a large specific surface area, and the powder is easy to agglomerate. It is often agglomerated during the preparation and drying process. If it is directly added to the coating system, it is difficult to disperse the agglomerated graphene only by high-speed stirring, ultrasound and other means. Moreover, ultrasonic technology is rarely used in the coating preparation process because it will cause too many bubbles. Zhuhai polycarbonate has developed a convenient and simple hyperdispersion technology for this purpose. In the coating solvent system, graphene is evenly dispersed directly through the three in one method of ultra-high speed shear, homogenization and stirring and the composite technology of ultrasonic after homogenization, which perfectly realizes the good compatibility of graphene in the coating

Zhuhai polycarbonate has the world's original technology of mass production of graphene by physical method. It is one of the few in the world that can achieve large-scale production at a cost generally accepted by the industry and truly achieve "zero emissions" in graphene production and application research and development. Moreover, the ultra-thin lamellar structure of graphene can form a dense physical insulation layer, which greatly improves the corrosion resistance of the coating; Thus, the amount of zinc powder is reduced, the zinc oxide mist generated during welding is reduced, and it is more environmentally friendly

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