Legor OXIFEND100 – Concentrated Anti-Tarnish Passivation Solution for Silver and Copper Alloys (5L)

Legor OXIFEND100 – Concentrated Anti-Tarnish Passivation Solution for Silver and Copper Alloys (5L)

The Legor OXIFEND100 is a concentrated anti-tarnish passivation solution developed for use on metals with low natural corrosion resistance such as silver, brass, bronze, low-karat gold, and electroplated surfaces. It forms an invisible protective layer that shields against tarnishing caused by hydrogen sulphide, UV light, synthetic sweat, and humidity. When diluted at a 1:20 ratio, one 5L container yields 100 litres of ready-to-use solution. It can be applied by either immersion or electrolytic method, making it suitable for detailed items like chains and recessed components.

Product Details:

• Solution form: Concentrated liquid
• Colour: Whitish (turns clear when heated and diluted)
• pH: Acidic
• Shelf Life: 18 months
• Dilution ratio: 1:20 (5L prepares 100L ready-to-use solution)
• Application method: Immersion or electrolytic

Operating Parameters:

• Temperature: 50°C – 60°C (Optimal: 55°C)
• Treatment Time: 5 – 20 minutes (Optimal: 10 minutes)
• pH (ready-to-use): 5.0 – 7.0 (Optimal: 6.0)
• pH (electrolytic with T-SALT): 3.0 – 5.0
• Voltage (electrolytic): 4.0 – 5.0 (Optimal: 4.5V)
• Agitation: Moderate
• Electrolytic Use: Add 2.5g/L of T-SALT and use MMO anodes

Equipment Requirements:

• Materials: Pyrex glass, PVC, or polypropylene tanks
• Heaters: Pyrex, quartz, or PTFE
• Power Supply: DC current rectifier with low ripple
• Anode (electrolytic use): MMO
• Filtration: Magnetic driven filter pump with 50 µm cartridge
• Tank insulation: Recommended for consistent temperature

Pre-Treatment Recommendations:

• Clean items ultrasonically and degrease prior to passivation
• Use neutralisation steps and rinse thoroughly to prevent contamination

Post-Treatment Recommendations:

• Rinse in hot water (60°C – 70°C)
• Dry using hot air (50°C – 60°C)
• Avoid mechanical drying methods

Water Quality:

• Use demineralised water with conductivity below 3 µS/cm for dilution and maintenance

Maintenance Guidelines:

• Monitor refractive index (target: 4 – 6 Brix)
• When R.I. drops by 1 point, add 12.5ml/L of OXIFEND100
• Replace solution every 4–6 months or when naturally exhausted

Safety Documentation:

• Safety Data Sheet
• Technical Sheet

Specifications:

• Weight: 6.2 kg
• Shipping: Hazard Goods
• Brand: Legor
• Solution Type: Anti-Tarnish / Passivation
• MPN: OXIFEND100

Note: Product images are for reference only and may vary from the actual item.