Use and Types of Zinc Rich Primers in Sealing

A zinc rich primer finds major application in steel surfaces. These surfaces are protected from corrosion, moisture and rust. How are they made? Zinc primers are made from zinc-rich coatings. These primers contain high levels of zinc dust, which prevents ferrous surfaces like steel from corroding. This primer's primary feature is to provide sacrificial cathodic protective protection to the steel substrate.

Zinc primers along with the Coal Tar Epoxy offer the same protection against corrosion as other epoxies and general paints. They use electricity to do the same. High humidity, high moisture, and high salinity environments, such as bridges, coastal plants, oil refineries, and other structures, can cause corrosion. Zinc-based primers are available.

Types of Zinc Primers - Organic and Inorganic

  1. Organic Zinc Primers
  • For the purpose of coating, organic zinc primers are made with Coal Tar Epoxy and urethane. These coatings are used in many industries, including construction, oil, energy, marine, and others. These environments are susceptible to high levels of corrosion.
  • Steel structures such as oil machinery, ships, power stations, chemical plants and chemical plants are all made of steel. These primers are recommended. To provide reliable protection, these coatings need a top coat. These primers can be applied using brushes, rollers, air spray or airless spray.
  • Over-application of coating can lead to coating failure and cracks. These failures are most commonly seen in corners and welds.
  1. Inorganic Zinc Primers
  • Most commonly, zinc primers made from inorganic zinc are used to protect against weathering.
  • They can be used as a single coat or as a primer to apply organic top coatings.
  • Inorganic zinc primers contain a higher level of zinc than organic ones. This undercoating protects several steel-based equipment and machines.
  • These coatings don't require top coatings, unlike organic Zinc primers.
  • Inorganic primer coatings, silicate acts as a binder.

Difference between Inorganic and Organic Zinc Primers

  1. Organic primers are made with epoxy, urethane and butyl as the binder. Inorganic primers, on the other hand, use zinc silicate binder.
  2. Organic primers work at lower temperatures, i.e. While organic primers can only work at 120 degrees celsius (or less), inorganic primers can perform at higher temperatures, up to 400 degrees celsius.
  3. Organic zinc primers are less resistant to sunlight, abrasion and solvents. Inorganic primers, on the other hand, are extremely resistant to these materials.
  4. Inorganic primers last for much longer than organic primers. An organic primer can last between 13 and 13.5 years in a coastal area. Inorganic primers can last for up to 15 years.

Conclusion

IWL India manufactures the Coal Tar Epoxy, which is specifically designed to protect pipelines against corrosion. Check out the website for more information about our extensive range of coatings and bitumen waterproofing membranes. We hope you will find this information useful.

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