| Metal corrosion is an inevitable problem, each year corrosion causes the direct economy loss as high as 1 trillion dollars, in numerous anticorrosion method, the coating is the most widely used and effectively. Solventless epoxy anti-corrosion coating is a kind of environment friendly coating which is still in development and applied in many fields, but in recent years, solventless epoxy anti-corrosion coating is more strict, which needs higher requirements. This paper studies the solventless epoxy anti-corrosion coating curing agent, prepares the anti-corrosion composite material applied in pipe-proof, and the mechanism of polyaniline in solventless epoxy anti-corrosion coating is also investigated.1、A novel kind of epoxy resin curing agents-cardanol modified phenolic amides was synthesized based on the Mannich reaction. Infrared spectroscopy(FTIR), differential scanning calorimetry(DSC), dynamic mechanical analysis(DMA), mechanical test, salt spray test, scanning eletron microscopy(SEM) and electrochemical test were carried out to characterize the properties of the epoxy coating cured by cardanol-aldehyde amide, and the results show that compared with cardanol-aldehyde amine, cardanol-aldehyde amide has a similar curing speed, the different types of acid to synthesize cardanol-aldehyde amide has a significant effect on its mechanical properties and corrosion protection properties, cardanol-aldehyde modified amine curing agent has excellent barrier property to medium and excellent anticorrosion property.2、cardanol-aldehyde amide was used as the curing agent of the solventless epoxy anti-corrosion coating, "three-oil and two-cloth" anti-corrosion composite materials composed of glass fiber cloth and solventless epoxy anti-corrosion coating were prepared, Infrared spectroscopy(FTIR), differential scanning calorimetry(DSC), dynamic mechanical analysis(DMA), mechanical test and salt spray test were carried out to characterize the properties of the composite material, and the results show that cardanol-aldehyde amide curing activiation energy is 52.4/mol, which can be cured in room temperature, the room temperature and balance modulus of the anti-corrosion compsite material is 5000Mpa and 2000MPa, which is 12.5 and 44 times compared with the solventless epoxy coating, at the same time, the tensile strength of the anti-corrosion composite material is 4.4 times to the solventless epoxy coating, the salt fog resistance of the anti-corrosion composite material is 10000h.3、Polyaniline and aniline and 5-aminosalicylic acid copolymer prepared by our own group as the anti-corrosion additives. Scanning eletron microscopy(SEM), transmission electron microscopy(TEM), electrochemical test and salt spray test were carried out to study the different types of anti-corrosion additive for the anti-corrosionproperities of the solventless epoxy anti-corrosion coating, the results show that polyaniline do not have anti-corrosion performance under neutral and alkaline environment, containing 1% aniline and 5- aminosalicylic acid copolymer solventless epoxy anti-corrosion coating still remains excellent anti-corrosion performance under neutral and alkaline environment. |
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