Hot Zinc Spray (HZS) is a process of applying a layer of zinc coating onto metal surfaces using a spray gun. This process is becoming increasingly popular as an alternative to hot dip galvanising, and for good reason. In this blog post, we will explore the advantages of HZS and why it may be a better choice for your metal coating needs.

Firstly, let’s discuss the process of HZS. This process involves heating zinc wire in a spray gun until it reaches its melting point. The molten zinc is then sprayed onto the metal surface, creating a layer of zinc coating. This layer is highly durable and provides excellent protection against corrosion and other forms of environmental damage.

  • Preparation: The metal surface to be coated is cleaned and prepped to remove any dirt, rust, or other contaminants that may interfere with the bonding of the zinc coating. This is typically done using a process called abrasive blasting, which involves using high-pressure air or shot / sand to blast the surface clean.
  • Application: Once the surface is prepped, the zinc wire is heated in a spray gun until it reaches its melting point. The molten zinc is then sprayed onto the metal surface using the spray gun. The spray gun is typically held about 6-12 inches away from the surface to ensure an even coating.
  • Finishing: After the zinc coating has been applied, it is allowed to cool and solidify. The surface may then be finished or polished to achieve the desired appearance or texture. The finished product is a metal surface that is protected against corrosion and other forms of environmental damage by a durable layer of zinc coating.
NSP The process of Hot Zinc Spray

One of the biggest advantages of HZS over hot dip galvanising is its versatility. HZS can be applied to a wide range of metal surfaces, including complex shapes and structures. This is because HZS is a spray-on process, which allows for greater precision and control when applying the coating. In contrast, hot dip galvanising requires the metal to be fully submerged in a bath of molten zinc. This can be difficult or impossible for complex shapes or structures.

Another advantage of HZS is its ability to create a more uniform coating. When using hot dip galvanising, the thickness of the zinc coating can vary depending on the shape and size of the metal being coated. HZS, on the other hand, allows for a more consistent coating thickness, ensuring that the entire surface of the metal is equally protected.

HZS is also faster and more efficient than hot dip galvanising. The spray-on process means that HZS can be completed in a fraction of the time it takes to hot dip galvanise. This is because the metal does not need to be submerged in a bath of molten zinc, which can be a time-consuming process. HZS also uses less energy than hot dip galvanising, which can be beneficial for companies looking to reduce their carbon footprint.

In addition, HZS can be more cost-effective than hot dip galvanising. While the initial cost of the spray gun and other equipment may be higher than the cost of a hot dip galvanising tank, the overall cost can be lower due to the speed and efficiency of the HZS process. This can be especially beneficial for companies with high-volume coating needs.

Finally, HZS provides a superior finish compared to hot dip galvanising. The spray-on process creates a smooth, even coating that is free of drips and other imperfections. This is in contrast to hot dip galvanising, which can sometimes result in a rough or uneven coating. The smooth finish of HZS can be particularly important for metal surfaces that will be visible or require a high level of aesthetics.

In conclusion, Hot Zinc Spray (HZS) is an excellent alternative to hot dip galvanising for metal coating needs. Its versatility, uniformity, speed, efficiency, cost-effectiveness, and superior finish make it an attractive option for companies looking to protect their metal surfaces from environmental damage and corrosion. Whether you are looking to coat complex shapes or structures, or simply want a high-quality, long-lasting finish for your metal surfaces, HZS is a great choice. We are experts at NSP Coatings, so get in touch today and get a free quote.