7. Surface finishes options for stainless steel machined parts
For CNC machining stainless steel post-processing, there are four surface treatments mostly used.
7.1 Stainless steel brushing
Stainless steel brushing is a surface treatment that involves stretching, friction or other processes on the surface of stainless steel to create a series of fine and slender textures or stripes. Brushing stainless steel can modify its look and surface structure. Brushing can be categorized into mechanical brushing, chemical cleaning, electrolytic cleaning, friction cleaning, and rotating cleaning.
The benefits of brushing stainless steel include boosting aesthetic allure, minimizing glow, concealing scratches, improving rust resistance, and enhancing tactile feel.
Brushed stainless steel is commonly used in the manufacturing of ornamental materials, furnishings, buildings, auto, and other industries.
7.2 Stainless-steel electropolishing
Stainless steel electropolishing is a surface area treatment that using an electrolytic response to its surface area finish, modifying the surface problem, and boosting the surface level of smoothness and brightness.
In the electropolishing process, the stainless-steel work surface is submersed in an electrolyte option and acts as the anode, permitting electric current to move. Through electrolytic responses, metal on the surface liquifies and re-deposits, resulting in raised surface area smoothness and the removal of issues, oxide layers, and various other disproportions.
Stainless steel surfaces treated with electropolishing commonly display higher reflectivity, a smoother texture, and boosted rust resistance.
Electropolishing stainless steel is extensively used in making industry and ornamental industries.
7.3 Stainless steel polishing
Stainless steel polishing is the surface treatment of stainless steel through mechanical or chemical methods to enhance its smoothness, glossiness, and overall visual quality.
The purpose of polishing is to remove defects, oxide layers, scratches, and other unevenness on stainless steel surfaces, creating a brighter and more decorative appearance.
Stainless steel polishing can be classified into mechanical polishing and chemical polishing.
Mechanical polishing involves using mechanical equipment such as grinders, polishers, or sandpaper to rub and grind the surface of stainless steel.
Chemical polishing involves applying chemical substances such as polishing agents or acidic solutions to the surface of stainless steel to dissolve and remove oxide layers and dirt.
After polishing, the surface of stainless steel is typically smoother and glossier, resembling a mirror-like effect. This treatment not only enhances the visual quality of stainless steel but also improves its corrosion resistance.
Polished stainless steel is suitable for applications with high surface requirements, such as decoration, furniture manufacturing, and medical instruments.
7.4 Stainless steel sandblasting
Stainless steel sandblasting is the surface treatment of projecting sand grains, or other particles onto the surface of stainless steel to create a matte, abrasive, or rough effect, altering its appearance and texture.
The purpose of sandblasting includes eliminating the gloss on the surface of stainless steel, creating a visual effect of sanding, while also concealing surface imperfections and scratches.