Due to its general strength and durability, steel is a common choice for stairs in commercial and industrial environments. However, not all steel is created equal.

Carbon steel, blunt and flat, is also prone to corrosion. Carbon steel is usually coated with powder to increase its durability and appearance. In other cases, shiny and bright stainless steel can be used for certain applications.

What is the difference between powder-coating steel and stainless steel?

The difference between stainless steel and powder-coated steel lies in the metals and processes used to make them. Powder coatings add a durable protective epoxy or polymer layer to the steel, while stainless steel adds metal additives to the composition of the steel to improve durability and corrosion resistance.

Powder-coated steel typically comprises iron, carbon, and other susceptible materials that are prone to rusting. To combat corrosion, the base steel undergoes a protective treatment involving the application of finely ground pigment and resin particles. The process begins with the electrostatic application of dry powder onto the steel surface, followed by heating in a curing furnace to facilitate curing. Through the use of static electricity, the paint and resin acquire an electrostatic charge before being sprayed onto the charged steel, ensuring proper adhesion. Ultimately, the powder coating is melted uniformly and cooled to form a thin, robust film that provides comprehensive coverage and durability to the steel.

Stainless steel is a steel alloy with a similar manufacturing process to carbon steel. However, the addition of elements such as chromium, nickel, nitrogen, and molybdenum to iron and carbon provides stainless steel with inherent corrosion resistance. The presence of chromium is essential in the production of stainless steel, requiring a minimum content of 10.5% to achieve stainless properties. When exposed to oxygen in the environment, chromium in stainless steel forms a thin oxide film, which acts as a protective barrier against rust. Consequently, stainless steel does not require additional coatings to safeguard it from corrosion.