Aluminum nuts yellow oxide

Features & Benefits
  • 耐腐蝕性 – Protects against oxidation and harsh environments.

  • Aesthetic & Identification – Bright yellow for color-coding or decorative uses.

  • Electrical Conductivity – Chromate coatings retain conductivity; anodizing does not.

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螺栓與螺帽的鎖緊與開口採用非標準設計,搭配
使用非標準工具來解決打開和緊固問題。一般而言,其他
wrenches cannot be inserted. In the appearance design of nuts and bolts, non-standard slotting,
開口或五角、七角、九角或客製化對應槽工具
起到了很好的防盜效果

冷镦加工是一种少切削或无切削的压力加工新工艺
金屬。它是一種利用金屬在下列因素作用下產生塑性變形的加工方法
外力作用下,在模具的幫助下,重新分配和轉移金屬的體積,以形成
所需的零件或坯料。冷镦工艺最适合生产标准的
螺栓、螺絲、螺帽、鉚釘和銷等緊固件

An Aluminum nuts yellow oxide is a fastener that has been treated with a yellow-colored surface finish, typically through anodizing 或 chemical conversion coating, to enhance both its appearance and performance. Below is a detailed breakdown:


1. Material

  • Made from aluminum (common grades: 6061, 2024, or 7075 for strength and lightweight properties).

2. Yellow Oxidation Process

Anodized Yellow

  • Anodizing Type II (Sulfuric Acid Anodizing) – Creates a porous oxide layer, which is then dyed yellow before sealing.

  • Hard Anodizing (Type III) – Produces a thicker, more wear-resistant layer, sometimes with a gold-like yellow hue.

  • Electrolytic Coloring – Uses metallic salts (e.g., ferric ammonium oxalate) to produce a yellowish-bronze tone.

Chemical Conversion Coating (Alodine/Iridite)

  • A cheaper alternative to anodizing, producing a gold-yellow chromate layer (common in military/aerospace specs like MIL-DTL-5541).

  • Provides moderate corrosion resistance and improves paint adhesion.

3. Features & Benefits

  • 耐腐蝕性 – Protects against oxidation and harsh environments.

  • Aesthetic & Identification – Bright yellow for color-coding or decorative uses.

  • Electrical Conductivity – Chromate coatings retain conductivity; anodizing does not.

  • Lightweight – Ideal for applications where weight matters (e.g., aerospace, drones).

4. Common Applications

  • Aerospace & Defense – Yellow-chromated nuts for corrosion resistance (e.g., aircraft panels).

  • Electronics – Color-coded fasteners in PCBs or machinery.

  • Automotive & Bicycles – Custom/high-visibility components.

  • Marine Hardware – Saltwater-resistant yellow coatings.

5. Variations in Yellow Finish

  • Bright Yellow – Dyed anodizing for vibrant colors.

  • Gold-Yellow – Chromate conversion coating (common in MIL specs).

  • Matte or Glossy – Surface finish depends on pre-treatment (e.g., etching, polishing).

6. Limitations

  • Anodized Yellow – Less UV-stable; may fade over time unless sealed properly.

  • Chromate Yellow – Contains hexavalent chromium (restricted in some regions; alternatives like trivalent chromate exist).

  • Not for High-Stress Use – Aluminum nuts are weaker than steel in heavy-load scenarios.

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