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Blackening Treatment: A Subtle Shield with a Signature Look
Blackening (black oxide treatment) is a chemical conversion process that produces a sleek black surface on metal parts. It improves corrosion resistance, maintains precision dimensions, and enhances appearance.
| Categories | Surface Finishing |
|---|---|
| Brand | SOMI Custom Parts Manufacturer |
| Model | Blackening |
| Blackening Color | Black |
| Update Time | Jul 14,2025 |
Detail Information
โ๏ธ Blackening Treatment: A Subtle Shield with a Signature Look
๐งฉ What Is Blackening?
Blackening (black oxide treatment) is a chemical conversion process that produces a sleek black surface on metal parts. It improves corrosion resistance, maintains precision dimensions, and enhances appearance.
๐ Process Workflow
- Cleaning โ Remove grease and impurities
- Surface Activation โ Acid pickling for uniform reaction
- Black Oxide Bath โ Heated chemical reaction with metal surface
- Rinsing & Sealing โ Apply oil, wax, or polymer coating
- Drying & Inspection โ Quality check and finish validation
๐งช Common Types of Blackening
| Type | Description | Temperature |
|---|---|---|
| Hot Black Oxide | Traditional, high-corrosion resistance | ~140โ145ยฐC |
| Cold Blackening | Room temp, good for soft metals | ~20โ25ยฐC |
| Mid-Temp Blackening | Energy-efficient, reduced steam | ~95โ105ยฐC |
| Stainless Steel Oxidizing | Special chemistry for stainless | Varies |
๐จ Color & Finish Options
- Jet black (matte or glossy)
- Charcoal black
- Dark gray (varies with sealant)
- Satin finish (oil or wax enhanced)
๐ฏ Application Areas
- ๐ Automotive โ gears, brackets, bolts
- ๐ซ Firearms โ housings, barrels
- ๐งฐ Industrial Machinery โ tools, shafts
- ๐ฑ Electronics โ connectors, frames
- ๐ฝ๏ธ Consumer Goods โ kitchenware, accessories
๐ก Technical Features
- Minimal thickness (~1 micron)
- Corrosion resistance (with sealants)
- Low reflectivity and improved lubrication
- Eco-friendly variants available
๐ Pros vs. Cons
| Advantages | Limitations |
|---|---|
| Elegant appearance | Requires sealant for full protection |
| Dimensional accuracy | Not suitable for non-metals |
| Improved lubricity | Less wear resistance than coatings |
| Cost-effective | Post-treatment steps needed |
๐ ๏ธ Compatible Materials
Suitable: Carbon steel, alloy steel, stainless steel (with special bath), cast iron, copper alloys
Not Recommended: Plastics, aluminum (unless pre-treated), porous metals
๐ฌ SOMI's Surface Engineering Signature
At SOMI, blackening transforms ordinary metal components into sleek, high-performance parts. When function meets finish, the result is unmistakably SOMI.
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From concept to product
From prototyping to production, our production sites can handle all your manufacturing projects.
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