⚙️ Blackening Treatment: A Subtle Shield with a Signature Look

🧩 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.

🔁 Process Workflow

• Cleaning – Remove grease and impurities
• Surface Activation – Acid pickling for uniform reaction
• Black Oxide Bath – Heated chemical reaction with metal surface
• Rinsing & Sealing – Apply oil, wax, or polymer coating
• Drying & Inspection – Quality check and finish validation

🧪 Common Types of Blackening

🎨 Color & Finish Options

• Jet black (matte or glossy)
• Charcoal black
• Dark gray (varies with sealant)
• Satin finish (oil or wax enhanced)

🎯 Application Areas

• 🚗 Automotive – gears, brackets, bolts
• 🔫 Firearms – housings, barrels
• 🧰 Industrial Machinery – tools, shafts
• 📱 Electronics – connectors, frames
• 🍽️ Consumer Goods – kitchenware, accessories

💡 Technical Features

• Minimal thickness (~1 micron)
• Corrosion resistance (with sealants)
• Low reflectivity and improved lubrication
• Eco-friendly variants available

🔍 Pros vs. Cons

🛠️ 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

💬 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.