As a professional metal parts custom manufacturer established in 1996, Kailai Machinery Co., Ltd. has always been committed to providing customers with high-precision metal stamping, stretching, welding and diversified surface treatment services. In the field of metal processing, surface treatment is not only related to the aesthetics of the product, but also a key factor in determining its corrosion resistance, wear resistance and service life. This article will introduce in detail the surface treatment processes applicable to different materials and their core advantages and disadvantages, helping customers to accurately select the best solution.

The following are common metal materials and adapted surface treatment processes

1. Stainless steel parts

- Electropolishing: remove microscopic burrs, improve surface finish, and enhance corrosion resistance, especially suitable for medical devices and food-grade equipment.

Disadvantages: high cost and limited effect on complex geometric shapes.

- Passivation: remove free iron particles through nitric acid or citric acid solution to form a dense oxide film, significantly improve salt spray resistance, suitable for marine environment applications

Disadvantages: Improper treatment may lead to local corrosion, and process parameters need to be strictly controlled.

2. Aluminum alloy parts

- Anodizing: Produces a porous oxide layer that can be dyed (such as black and gold), with a hardness of up to HV800, suitable for consumer electronic housings and aerospace parts.

Disadvantages: Limited color selection (bright colors are difficult to achieve), and high power consumption leads to high costs.

- Electroless Nickel Plating: Uniformly covers complex geometric shapes, has better wear resistance than electroplating, and is suitable for high-precision parts such as hydraulic valve blocks.

Disadvantages: The plating solution contains phosphorus, and waste liquid treatment must meet environmental protection requirements.

3. Carbon steel and alloy steel parts

- Hot-Dip Galvanizing: The coating is thick (50-150μm) and has strong corrosion resistance. It is suitable for outdoor structural parts such as transmission towers and guardrails.

Disadvantages: The surface is rough, prone to defects such as zinc slag and leakage plating, and high-temperature processes may cause deformation of the workpiece.

- Electroplating Zinc: Uniform coating (3-5μm), low cost, suitable for precision fasteners.

Disadvantages: Poor corrosion resistance, prone to hydrogen embrittlement, not suitable for high-strength bolts.

- Powder Coating: Environmentally friendly and solvent-free, optional matte/high gloss effect, outdoor weather resistance of more than 10 years, suitable for engineering machinery housing.

Disadvantages: High requirements for pre-treatment, general ability to cover defects.

Differentiation advantages of Kailai Machinery

- 28 years of process precipitation: Exclusive mastery of hot-dip galvanized aluminum control technology (0.005%-0.020%Al), reducing zinc ash generation.

- One-stop service: Full process control from stamping to surface treatment to avoid multi-link collaboration errors.

- Environmental compliance: Chrome-Free Pretreatment and low-pollution electroplating process are used to comply with EU RoHS standards.

Choosing Kailai Machinery, you get not only metal parts, but also industrial artworks that stand the test of time. Welcome to visit the official website or call 0086-535-2293337 to get customized solutions!