Blog Category:Surface Finishes

Oxidize brass antiquing methods create a controlled aged surface on brass by darkening the outer copper-rich layer and, when needed, polishing high points back to a warm metallic highlight. For CNC machined brass parts, this finish is more than a decorative color. It affects how grooves, threads, engraving, edges, knurled areas, and flat machined faces […]

Brass parts are often selected for CNC machining because they cut cleanly, hold fine details, and provide a warm metallic appearance. However, a freshly machined brass surface can show tool marks, handling stains, burr traces, and directional cutting lines. Brass sandblasting is used when engineers need a more uniform matte texture without changing the part […]

Aluminum corrosion removal is not simply a matter of making a metal surface look brighter. The cleaning method must distinguish harmless natural oxide from active attack, remove contamination without excessive etching, protect dimensional features, and prepare the part for service or a new finish. This guide explains how corrosion develops on aluminum parts, how to […]

Chrome plating may need to be removed when it peels, pits, cracks, looks uneven, hides corrosion, or makes a precision feature oversize. For CNC machined parts, removal is not merely a cleaning task. The coating may be part of the final diameter, surface roughness, wear system, or sealing function. A successful repair must remove the […]

Sandblasting is a mechanical surface treatment that propels abrasive particles toward a part at controlled speed. On CNC machined components, it is commonly selected to remove light oxidation, reduce visible tool marks, create a uniform matte texture, or prepare a surface for a later coating. The process appears simple, but the final result depends on […]

Polished titanium is produced by progressively removing machining marks and microscopic peaks until the surface becomes smoother and more reflective. It is used on visible CNC components, cleanable parts, low-friction contact areas, and products where a refined metallic appearance matters. However, polishing is not only cosmetic. It removes material, can soften edges, exposes defects left […]

Black nickel plating gives machined metal parts a dark metallic appearance while adding a thin protective coating. It is commonly considered for visible components, low-reflectivity surfaces, control parts, instrument assemblies, electronics housings, and decorative mechanical products. However, “black nickel” is not one universally identical finish. Suppliers may use different underlayers, blackening chemistries, sealers, and deposition […]

Zinc plating is one of the most common surface finishes for steel CNC machined parts because it is affordable, bright, and useful against everyday corrosion. The direct answer is yes: zinc plated parts can rust, but they usually rust much more slowly than bare steel. The zinc layer acts as a sacrificial coating, so the […]

Black anodizing is one of the most requested surface finishes for CNC machined aluminum parts because it combines a clean dark appearance with better corrosion resistance, improved surface durability, and relatively small dimensional change. For buyers, engineers, and product designers, the challenge is not simply asking for “black anodize.” The final result depends on alloy […]

Galvanizing is a zinc-based surface treatment used to protect steel from corrosion, but it is often misunderstood. Many buyers ask whether galvanized steel can rust, why a white powder appears on the surface, and whether this finish is suitable for precision CNC machined parts. The practical answer is that galvanized steel can eventually rust, especially […]

Polishing titanium is a surface finishing method that removes machining marks, fine scratches, burr traces, and microscopic peaks from titanium parts. For CNC machined titanium components, polishing is not only about making the surface look brighter. It can reduce friction, improve cleanability, prepare visible surfaces for premium products, and help parts meet a specified surface […]

Dark bronze anodized aluminum is a protective and decorative finish used mainly on aluminum CNC machined parts when a product needs a darker architectural look, improved corrosion resistance, better surface hardness, and a more premium appearance than raw aluminum. It is not just a paint color. The finish is created by building a controlled aluminum […]

Yes, aluminium can be chrome plated, but it requires a controlled plating route rather than a simple direct coating. Aluminum forms an oxide film quickly, so reliable chrome plating normally needs cleaning, activation, and intermediate layers before the final chromium layer. For CNC machined parts, this finish can create a bright silver look, improve wear […]

Nickel plating and zinc plating are two common metal finishing options used after CNC machining, especially for steel, brass, copper alloys, and selected functional components. Buyers often compare them because both can improve corrosion resistance and appearance, yet they solve different problems. Zinc plating is usually chosen for economical rust protection on steel parts, while […]

Black oxide and zinc plating are two common surface treatments for steel CNC machined parts. They are often compared because both can improve appearance and provide some level of surface protection, but they do not work the same way. Black oxide is usually selected for a dark, low-glare finish with minimal dimensional change. Zinc plating […]