Surface finishing is essential in engineering and manufacturing, improving performance and longevity as well as visual appeal. Here are some surface treatments commonly used in industries including aerospace, automotive and construction
Mechanical Finishing
This provides the foundation for many processes. Polishing removes fine scratches to create a smooth, glossy surface, often improving corrosion resistance. Alternatives such as sandblasting or shot peening roughen or compress surfaces, either preparing them for coatings or improving fatigue strength. Brushed finishes deliver a satin look that disguises minor flaws while enhancing aesthetics.
Chemical Surface Treatments
Such processes rely on controlled reactions. Black oxide forms a thin protective film on steel, improving corrosion resistance and creating a dark, uniform colour. Phosphating, common in automotive and machinery parts, enhances coating adhesion and wear resistance. Passivation is a process that protects stainless steel by forming an inert surface layer.
Electrochemical Processes
These treatments add metallic layers for durability or conductivity. Zinc plating offers cost-effective rust protection, while nickel and chrome plating combine wear resistance with decorative appeal. Anodising, especially for aluminium, creates a hard oxide film that can also be dyed in vibrant colours.
Aerospace is one industry that is constantly looking for improved solutions. At present, anodising is one of the most common aerospace surface treatments, requiring the expertise of specialists such as https://www.poeton.co.uk/about/industries/aerospace-defence.
Coating systems
Coating extends both appearance and function. Powder coating and PTFE coatings add resistance to impact, corrosion, or friction, while diamond-like carbon delivers exceptional hardness. Finally, physical vapour deposition produces ultra-thin, high-performance films for tools, aerospace, and medical components.
