Precision Machining and Post-Processing of Hardware Parts: Nitriding, Anodizing, Sandblasting, and Electrocoating

The processing of metal parts does not end with CNC cutting. The post-processing technology determines the corrosion resistance, surface hardness, and appearance of the parts. Dongguan Yiruida Technology Co., Ltd. provides comprehensive metal processing and post-processing services from aluminum alloys to stainless steel and magnesium alloys, meeting the strict requirements of industries such as automotive, aerospace, and medical.

Processable Metal Materials

Aluminum Alloy (6061, 7075, 5052)
Stainless Steel (304, 316L)
Magnesium Alloy, Brass, Copper
High-Strength Steel S550MC

Detailed Explanation of Post-Processing Technology

1. Anodizing

Applies only to aluminum alloys.
Increases surface hardness (up to HV300 or higher) and improves corrosion resistance.
Available colors: natural color, black, red, blue, etc.
Sandblasting + Anodizing: First sandblast to remove tool marks, then anodize to achieve a matte texture.

2. Nitriding

Applies to stainless steel and alloy steel.
Forms a hardened layer on the part surface (HV800-1200), improving wear resistance.
Suitable for gears, shafts, and mold parts.

3. Electrocoating + Powder Coating

Electrocoating: Uniform coverage, excellent rust prevention, usually black.
Powder Coating: Thick coating, impact resistance, rich colors.
Suitable for structural parts such as S550MC, like car chassis components.

4. Sandblasting

Removes oxide scale and tool marks, achieving a uniform matte surface.
Can be used as pretreatment for anodizing or electrocoating.

5. Natural Finish

Maintains the original metal color, only deburring and cleaning are done.

Typical Application Cases

Aerospace Bracket: 7075 Aluminum Alloy CNC Machining + Sandblasting + Hard Anodizing
Medical Surgical Instruments: Stainless Steel CNC Machining + Nitriding + Polishing
Automotive Suspension Parts: S550MC Stamping + Electrocoating + Powder Coating