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Adhesivos

Epoxy anti-corrosion coating

Paint or coating based on epoxy resin that protects metal surfaces against electrochemical corrosion, chemicals, water and marine environments. Systems: zinc-rich epoxy primer (galvanic protection), high-build epoxy intermediate (100–300 µm DFT), coal-tar epoxy (immersion service). Application temperature: 5–40 °C; dry film thickness: 100–500 µm. Brands: Sherwin-Williams, Jotun, Belzona 1321, Loctite PC 7255.

What you need to know

  • Paint or coating based on epoxy resin that protects metal surfaces against electrochemical corrosion, chemicals, water and marine environments.
  • Systems: zinc-rich epoxy primer (galvanic protection), high-build epoxy intermediate (100–300 µm DFT), coal-tar epoxy (immersion service).
  • Application temperature: 5–40 °C; dry film thickness: 100–500 µm.
  • Brands: Sherwin-Williams, Jotun, Belzona 1321, Loctite PC 7255.

Full definition

Epoxy anti-corrosion coatings are advanced protective layers formulated from epoxy resins, primarily designed to safeguard metal surfaces from various forms of corrosion, including electrochemical, chemical, and environmental degradation. These coatings are popular in industrial applications due to their excellent adhesion, durability, and resistance to harsh conditions. They are capable of withstanding exposure to water, chemicals, and marine environments, making them ideal for use in sectors such as marine, oil and gas, and heavy manufacturing. The effectiveness of these coatings is often enhanced through the use of specialized formulations, such as zinc-rich epoxy primers that provide galvanic protection. This type of primer contains zinc particles that sacrifice themselves to protect the underlying metal, preventing rust and extending the lifespan of metal structures.

The application of epoxy anti-corrosion coatings requires careful attention to detail, particularly regarding the surface preparation and application conditions. The typical dry film thickness (DFT) for these coatings ranges between 100 to 500 µm, depending on the specific application and environmental exposure expected. High-build epoxy intermediates can achieve a DFT of 100-300 µm, providing robust protection against corrosion. The ideal application temperature for these coatings is between 5–40 °C, ensuring proper curing and film formation. Curing times can vary, but it is critical to follow the manufacturer's specifications to achieve optimal performance.

Moreover, epoxy coatings can be categorized into different types, such as coal-tar epoxy, which is particularly effective for immersion service due to its outstanding resistance to water and chemicals. These coatings can be used in various applications, including pipelines, storage tanks, and offshore structures. By preventing corrosion, these coatings not only protect the structural integrity of metal surfaces but also minimize maintenance costs and downtime associated with corrosion-related repairs.

What you need to know

  • What you need to know: Epoxy coatings are formulated to protect metal surfaces from electrochemical corrosion and harsh environmental conditions.
  • Typical dry film thickness (DFT) ranges from 100 to 500 µm; high-build intermediates can achieve 100–300 µm.
  • Application temperature for epoxy coatings is typically between 5–40 °C to ensure proper curing.
  • Zinc-rich epoxy primers provide galvanic protection, sacrificing zinc to protect underlying metals.
  • Coal-tar epoxy is ideal for immersion service, offering exceptional resistance to water and chemicals.

Industrial applications

  • 1Marine environments where metal surfaces are exposed to saltwater, requiring high corrosion resistance.
  • 2Oil and gas pipelines that need protective coatings to withstand harsh chemicals and external conditions.
  • 3Storage tanks for chemicals and petroleum products requiring robust protection against corrosion.
  • 4Heavy manufacturing facilities that rely on machinery and equipment exposed to moisture and abrasive materials.
  • 5Offshore structures needing durable coatings to maintain structural integrity in extreme conditions.

Common mistakes

  • ✕Failing to properly prepare the surface before application, which can lead to poor adhesion and early coating failure.
  • ✕Not adhering to the recommended application temperature, resulting in improper curing and compromised performance.
  • ✕Overlooking the required dry film thickness, which can reduce the coating's effectiveness and lifespan.
  • ✕Neglecting to follow the manufacturer's instructions for mixing and application, leading to inconsistencies in the coating.
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Pro tip

Ensure thorough surface preparation and follow the manufacturer's application guidelines to achieve optimal adhesion and durability.

Suppliers of industrial adhesives in Mexico

AguascalientesVer Hule Industrial
Ciudad JuárezVer Hule Industrial
Ciudad de MéxicoVer Hule Industrial
GuadalajaraVer Hule Industrial
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