Different types of steel finishes

In the construction industry, the finishes applied to metal surfaces are pivotal, not just for aesthetics but also for durability and protection against corrosion. Among the array of finishing techniques available, sandblasting, shot blasting, powder coating, galvanisation, and traditional painting stand out as methods that contribute to both the aesthetics and longevity of steel structures. Let’s have a look at the most popular types of steel finishes we work with.

Types of steel finishes we use at MAH Steel

Sandblasting, also known as abrasive blasting, is a surface preparation technique. It involves the high-velocity projection of fine particles, typically sand or other abrasives, against the steel surface. This method effectively removes rust, scale, and old coatings. Thus leaves a clean and textured surface ready for further treatment. Sandblasting not only eliminates contaminants but also creates a textured surface, enhancing adhesion for subsequent finishes. It is ideal for surface restoration and paint removal.

Similar to sandblasting, shot blasting employs spherical beads or metallic shots as the abrasive material. This method excels in cleaning and refining steel surfaces, providing a uniform texture and profile. Shot blasting achieves a consistent surface texture, removes rust, mill scale, and contaminants. Besides, it enhances adhesion for subsequent finishes. It is often used as a pre-treatment before applying coatings or paint.

Traditional painting and coatings continue to be popular methods for enhancing the appearance of steel surfaces while providing a protective barrier against the elements. Various types of paints and coatings, including epoxy, polyurethane, and enamel, offer different levels of durability and resistance. Intumescent and fire-resistant paint are also used.

Galvanisation steps in as the shield against corrosion, involving coating steel with a layer of zinc. This can be achieved through hot-dip galvanising, where steel is immersed in molten zinc, or electro-galvanising. The latter involves applying zinc through electrolysis. Galvanised steel is renowned for its robust corrosion resistance and excellent durability, and is commonly used in outdoor and marine applications. Read more types of steel galvanisation in our steel galvanising blog!

Moving on to powder coating, this dry finishing process involves electrostatically applying a fine powder to a steel surface and curing it under heat. The result is a smooth, durable, and vibrant finish improves aesthetics. It also provides excellent resistance against corrosion, chemicals, and UV rays. Powder coating offers a wide range of color options and finishes, provides a durable and resistant coating, and is environmentally friendly with minimal waste.

Finally yet importantly

In choosing a steel finish, factors such as intended use, environmental conditions, and desired aesthetics come into play. Sandblasting and shot blasting prepare the steel surface for subsequent finishes, while powder coating, galvanisation, and traditional painting offer varying degrees of durability and visual appeal. Each method serves a unique purpose in ensuring that steel structures not only withstand the test of time but also showcase a remarkable finish.

At MAH Steel, we work with all types of steel finishings. No matter if it’s only a small project or a big residential job, drop us a line. We’ll come back to you in no time!