What are the main purposes of metal surface finishing?
Metal surface finishing in manufacturing and engineering involves altering or treating the surface of metal. The aim is to not only improve its appearance but also improve its properties, durability, and performance.
Protecting against corrosion
Selecting the appropriate surface finishing method requires careful consideration of different factors, such as the type of metal, the intended use of the part, the environmental conditions it will face, and the available budget.
One of the main purposes of surface finishing is to protect metals from corrosion. Exposure to moisture, chemicals, or different environmental conditions can cause metals to deteriorate over time. Electroplating, anodising, or applying protective coatings can create a barrier that prevents or slows down the corrosion, extending the lifespan of the component so it can keep its structural integrity
Advanced aerospace surface treatments by specialists such as https://www.poeton.co.uk/about/industries/aerospace-defence/ are often used to improve corrosion resistance.
Increasing hardness and wear resistance
Different metals respond differently to surface treatments, so it is essential to match the finishing process to the right material’s properties. Surface finishing also improves the mechanical performance of metals. Treatments such as heat treatment, nitriding, or hard coatings improve hardness and the metals’ resistance to wear. This is especially important for tools, machinery parts, and car components that are exposed to repeated friction, impact, or high loads.
Improving aesthetics
Beyond functional benefits, surface finishing significantly improves the aesthetics of metal products. Polishing, buffing, and decorative coatings give metals a smooth, shiny, or textured surface. In many consumer and decorative applications, appearance is just as important as performance.
