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Corrosion resistance of FRP products

Source: Time:2020-08-11 11:18:41 瀏覽次數:

?The corrosion resistance of FRP products mainly depends on the function of the resin. The fewer functional groups in the resin, the lower the activity and the more stable the resin. For example, ester groups are easily dissolved in alkaline water
      The corrosion resistance of FRP products mainly depends on the function of the resin. The fewer functional groups in the resin, the lower the activity and the more stable the resin. For example, ester groups are easily dissolved in alkaline water, amide groups are easily dissolved in acid, C-O and C-N are easily hydrolyzed, and C-H is easily oxidized. These are chemical effects. Secondly, it is also related to glass fiber, fillers, curing agents and surface treatment agents. In addition to chemical or physical effects on the glass fiber and resin, the chemical medium also has an effect on the interface bonding, resulting in damage to the function of the glass fiber reinforced plastic.

      Generally, only the strength of glass fiber in FRP is calculated, and only the strength in the direction of force is calculated. The laying direction of the glass fiber should be considered. The resin is only regarded as the spatial orientation fixation of the glass fiber, regardless of its dedication to strength. Such accounting tends to be safe. The smaller the diameter of the glass fiber, the higher the strength of FRP products.
      The alkali-free fiber has high tensile strength because of the high molding temperature and fast hardening speed. There are also the influence of the quality of the glass liquid on the strength of the glass fiber, the influence of the molding conditions on the strength of the glass fiber, the influence of the appearance treatment on the strength, the influence of the storage moment on the strength, the influence of the load moment on the strength, if you want to accurately control the strength of FRP products In addition to the built-in skeleton steel structure of the product, the above factors must be fully considered.

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