The anti-corrosion coating on the outer surface of petrochemical valves in coastal cities has a short lifespan
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The image below shows that the anti-corrosion coatings on the outer surfaces of petrochemical valves in coastal cities have a short lifespan; acrylic anti-corrosion coatings are typically used, but they fail after less than 3 years. Check if there are any better protection methods.
Coastal areas have high salt levels and high humidity, which indeed pose a strong corrosive threat to anti-corrosion coatings. The acrylic coating fails in less than three years, indicating that it cannot withstand such an environment. The following more durable options can be considered: 1. **Epoxy zinc-rich primer + polyurethane topcoat**: This combination offers strong rust resistance and good salt spray resistance, with a typical service life of 5-8 years. 2. **Fluorocarbon coating**: It offers excellent weather resistance, is UV-resistant and corrosion-resistant, with a lifespan of over 10 years, but it is slightly more expensive. 3. **Hot-dip zinc/aluminum coating + sealing coat**: A metal coating combined with a sealing treatment, especially suitable for harsh environments, offering highly durable corrosion protection. If corrosion is particularly severe, **external current cathodic protection** can also be applied in combination with coatings for even better results. Regular inspection and repair can also extend the overall lifespan. If necessary, you can consult a professional anti-corrosion company to assess the specific environment before determining a plan. .
No matter where, corrosion prevention is a tough task