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1. Physical barrier effect
The density of the resin matrix: After the resin (such as epoxy, unsaturated polyester, phenolic, etc.) is cured, a continuous and dense protective layer is formed, effectively preventing corrosive media (acids, bases, salts, solvents, etc.) from penetrating into the material interior.
Fiber-reinforced structure: Glass fibers are evenly distributed throughout the resin as the framework, which not only enhances mechanical strength but also extends the penetration path of corrosive media through the interwoven structure.
2. Chemical Stability
Resin corrosion resistance: Different resins have varying degrees of tolerance to corrosive media:
Epoxy resin: Resistant to strong acids, strong bases and organic solvents.
Unsaturated polyester resin: Suitable for general acidic and alkaline environments.
Phenolic resin: Resistant to high temperatures and strong acids.
The inertness of glass fibers: The chemical properties of glass fibers themselves are stable. When encapsulated in resin, they do not come into direct contact with most media and thus avoid corrosion.
3. Electrochemical inertness
Non-conductivity: Fiberglass-reinforced plastic is an insulating material and does not undergo electrochemical corrosion (such as in primary battery reactions or galvanic corrosion) like metals do.
No oxidation issue: Resistant to corrosion and aging (a protective layer needs to be added under ultraviolet light), especially suitable for humid, salt spray and other environments.
4. Structural Integrity
Seamless Design: Formed through winding, molding, etc., this design minimizes joints and gaps, preventing medium leakage.
Anti-permeation process: The surface can be coated with a gel coat layer or a fluorocarbon coating, which further enhances the sealing performance and weather resistance.
5. Application Scenarios and Advantages
Typical applications: Chemical storage tanks, pipelines, chimneys, desulfurization towers, sewage treatment equipment, etc.
Advantages: Lightweight and high strength, long service life (up to 20 years or more), low maintenance cost, and it can replace metals such as stainless steel and titanium alloy.
The key factors affecting the anti-corrosion performance
1. Resin selection: The type of resin should be selected based on the specific corrosive environment (medium type, concentration, temperature).
2. Process quality: Manufacturing defects (such as bubbles, delamination) can reduce the anti-corrosion effect.
3. Usage conditions: High temperatures or mechanical impacts may damage the resin layer, so special reinforcement measures are required.
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