In the competitive market of industrial coating, the pursuit of cost-cutting measures often leads to compromised quality, leaving customers with subpar products. This article aims to shed light on the importance of thorough surface preparation processes like shot blasting, and the benefits of hot zinc spray and zinc primers in corrosion protection. We will also discuss the unethical practices prevalent in the industry, where some operators skip crucial steps but still charge for them.

The Crucial Role of Proper Surface Preparation in Coating1

The Importance of Shot Blasting in Coating

Shot blasting is an essential preparatory step in the coating process. It involves propelling abrasive material against a surface under high pressure to thoroughly clean and prepare it for coating.

Benefits of Shot Blasting:
Removes Rust and Impurities: It effectively eliminates rust, scale, and other contaminants from the metal surface.

Creates a Smooth Surface Profile:
This ensures better adhesion of the coating, leading to a more durable finish.

Detects Surface Flaws:
Shot blasting can expose underlying defects in the metal, allowing for timely corrective measures.

Failing to perform shot blasting can result in poor coating adhesion, leading to premature peeling and flaking.

Hot Zinc Spray for Superior Corrosion Protection

Hot Zinc Spray (HZS) is an advanced method of applying a zinc coating to metal surfaces for corrosion protection. The process involves spraying molten zinc onto the prepared surface, creating a protective barrier.

Advantages of Hot Zinc Spray: Long-term Corrosion Resistance: Zinc acts as a sacrificial layer, corroding in place of the underlying metal.

Versatility: HZS can be applied to complex shapes and sizes.

Durability: It forms a tough, abrasion-resistant coating, ideal for harsh environments.

The Crucial Role of Proper Surface Preparation in Coating2

Zinc Primers as an Effective Alternative

Zinc primers, containing high levels of metallic zinc dust, provide significant corrosion protection as a part of the coating system.

Why Zinc Primers?

Cathodic Protection: They protect the metal cathodically, similar to HZS.

Ease of Application: Zinc primers can be applied like regular paint, making them suitable for various applications.

Cost-Effective: They offer a more economical option while still providing substantial corrosion resistance.

Exposing Industry Shortcuts

Unfortunately, the industry is not devoid of unscrupulous practices. Some operators skip essential steps like shot blasting and the application of zinc-based coatings, yet charge customers for these processes. This deceit not only leads to inferior products but also poses risks like structural failures and increased maintenance costs.

The Consequences

Compromised Safety: Inadequate surface preparation can lead to coating failures, risking the integrity of the structure.

Financial Loss: Customers end up paying for services they never receive, resulting in financial losses and potential future repair costs.

Damaged Reputation: Such practices damage the industry’s reputation, undermining the trust of clients and consumers.

The Crucial Role of Proper Surface Preparation in Coating3


At NSP Coatings, our commitment to integrity and quality over the past 24 years has been unwavering. We believe in the importance of thorough surface preparation, whether through shot blasting, hot zinc spray, or zinc primers, to ensure the longevity and durability of our coatings. Our stance against unethical shortcuts in the industry is firm, as we strive to maintain transparency and deliver true value to our customers. Remember, in the world of industrial coatings, what lies beneath is as important as the final coat itself.