Surface Finishing Services for Sheet Metal

Anodizing is an electrochemical process used mainly for aluminum parts. The metal part is submerged in an acid bath and an electric current creates a thin, hard oxide layer on its surface. This protective oxide coating improves the metal’s hardness and greatly increases resistance to corrosion and wear. Anodizing can also add color – the oxide layer is porous and can be dyed in various colors before sealing, which is perfect for decorative finishes. We provide anodizing in China for your aluminum components to enhance their performance and appearance. An anodized finish is ideal for parts that need protection in harsh environments (for example, marine hardware or outdoor devices) or a sleek colored surface for consumer electronics. It’s a common choice for items like computer housings, appliances, architectural aluminum, and equipment exposed to weather.

Electroplating applies a thin metal coating onto a part by using an electrical current in a plating solution. In simple terms, the part is placed in a bath and electricity deposits a layer of another metal (such as zinc, nickel, or chrome) onto its surface. We offer metal plating in China, including zinc plating, nickel plating, chrome plating, and others, to enhance corrosion resistance or add specific properties to your parts. For example, a steel bracket can be zinc-plated to prevent rust, or an electronic connector can be gold-plated for better conductivity. Plating is a versatile finish – almost any metal part that conducts electricity can be electroplated to improve its performance or lifespan. This method is widely used for increasing durability, preventing oxidation, and even for decorative chrome finishes on parts in industries like automotive and electronics.

Polishing is a finishing method where we buff or chemically treat the metal surface to make it smoother and often shiny like a mirror. Our metal polishing services remove fine scratches and blemishes, creating a bright, reflective finish that is ideal for decorative or high-cleanliness parts. Polishing does not add any coating; instead, it refines the existing surface for improved appearance and smoothness. For instance, stainless steel components in medical or kitchen applications are frequently polished to a mirror or satin finish for aesthetics and easy cleaning. Polishing enhances the visual appeal of metal products and is commonly used for items like kitchenware, medical devices, and automotive parts to achieve the desired smoothness and luster. If you need your metal parts to shine or be ultra-smooth, our polishing service can achieve that.

Brushing (brushed finish) is a technique that gives metal a uniform satin texture with fine linear grain. We use abrasive pads or brushes to rub the metal surface in one direction, which removes a tiny layer of material and creates visible brush lines (grain). The result is a matte finish with subtle streaks, often seen on stainless steel appliances or aluminum panels for a modern look. A brushed finish not only looks stylish but also helps hide fingerprints and minor scratches on the surface. This makes brushing popular for parts that will be touched or seen frequently, such as control panels, appliance fronts, electronics enclosures, and decorative trims. We can apply brushed finishes to stainless steel, aluminum, and other metals to give your parts a clean, consistent texture as per your design needs.

Sandblasting is a surface preparation technique that involves blasting abrasive materials at high pressure onto the surface of a metal part to clean, roughen, or smooth it. This process is often used to prepare metals for other finishes, such as painting or coating. It creates a textured finish, cleans surface contaminants, and increases adhesion for coatings. Sandblasting is ideal for surface preparation, industrial equipment, and sculptures.

Chemical coating involves the application of a thin layer of chemicals to the metal surface to provide corrosion resistance, lubricity, or improved adhesion for paint and other coatings. This finish enhances the metal’s durability and is often used as a preparatory step for other finishes. It provides added protection against rust and corrosion, improves bonding for paint or adhesives. Chemical coating is ideal for automotive, manufacturing, and heavy equipment industries.

Galvanizing is the process of coating steel or iron with a layer of zinc to protect it from rust and corrosion. This highly effective process creates a durable finish that can withstand harsh environmental conditions, including extreme weather and exposure to chemicals. Benefits of galvanizing are superior corrosion resistance, long-lasting protection, and minimal maintenance. Galvanizing is ideal for outdoor applications, structural components, and piping.

Both paint and powder coating are effective methods for finishing metal parts, with each having unique advantages. Powder coating is a durable, long-lasting finish, while paint can be used for a wider variety of colors and textures. Choosing between the two depends on the specific requirements of your project, such as durability and aesthetic preferences. Painting is suitable for more intricate designs with variety of colors. It gives greater look for metal furniture, outdoor signage, and decorative elements.