How to Prevent Braided Wire Copper Bus Bar Oxidation

According to the State Grid's 2025 Electrical Equipment Fault Report, 28% of low-voltage busbar failures come from copper oxidation. A braided wire copper bus bar uses interwoven copper strands for flexible current transmission. But its exposed surface easily oxidizes. This article explores core anti-oxidation methods, effect verification, performance guarantees, application fields, and Xiamen APOLLO's solutions.

 

 

1. Surface Plating Treatment​

Apply tin or nickel plating to the busbar's surface. The plating thickness should be 2-5μm (per GB/T 4706.1-2024). This forms a dense protective layer. It blocks direct contact between copper and air. It reduces oxidation by 90%.​

 

2. High-Temperature Insulation Coating​

Brush a silicone-based insulation coating on copper stranded wire. The coating resists heat up to 180℃. It also has good adhesion. It not only prevents oxidation but also improves insulation. It suits high-temperature places like industrial ovens.​

 

3. Humidity Control in Installation Environment​

When installing a flexible braided copper busbar, keep ambient humidity below 65%. Use dehumidifiers in damp areas (e.g., coastal workshops). Lower humidity slows the chemical reaction between copper and moisture. It extends the busbar's anti-oxidation life by 5-8 years.

 

 

1. Neutral salt spray test: Put a copper braided busbars for electrical in a 5% NaCl solution at 35℃. No visible oxidation spots after 48 hours mean the anti-oxidation treatment meets standards. This simulates coastal or high-salt industrial environments.​

 

2. Contact resistance test: Measure the resistance of soft bare copper wires before and after 6 months of storage. A resistance increase ≤5% shows effective anti-oxidation. Oxidation would cause a sharp resistance rise.​

 

3. Oxide layer thickness test: Use a thickness gauge to check the oxide layer on copper stranded wire. A thickness ≤0.01mm after 12 months of use proves the anti-oxidation method works. Thick oxide layers block current transmission.

 

 

1. Conductivity Stability​

Anti-oxidation treatments (plating/coating) must not reduce conductivity. A flexible braided copper busbar should keep conductivity ≥98% IACS (per GB/T 5585.1-2017). This ensures oxidation prevention does not affect current transmission efficiency.​

 

2. Mechanical Flexibility Retention​

The braided structure's flexibility must stay the same. A copper braided busbars for electrical should withstand 10,000 bending cycles (bending angle ±90°). No plating peeling or coating cracking is allowed. Oxidation prevention should not harm the busbar's core flexible advantage.​

 

3. Corrosion Resistance in Harsh Environments​

After anti-oxidation treatment, soft bare copper wires should resist corrosion from weak acids (e.g., 10% acetic acid). No surface pitting after 24 hours of immersion means the treatment suits chemical workshops or polluted industrial areas.

 

 

1. Copper Strand Core Structure​

Each copper strand uses soft bare copper wires with a diameter of 0.1-0.3mm (per GB/T 5585.1-2017). These wires have high ductility, so they won't break during braiding. 7-19 such wires are twisted into one copper stranded wire, which forms the basic unit of the busbar's conductive core.​

 

2. Braided Layer Structure​

The braided layer is made by interweaving multiple copper stranded wires. The braid density is 80-95% (adjustable by demand). A flexible braided copper busbar with higher density has better conductivity and anti-oxidation performance-since fewer gaps let air contact the copper.​

 

3. Protective Layer Structure​

The outer protective layer (for anti-oxidation) has two types: 1) Tin/nickel plating (thickness 2-5μm) on the braided layer, which is suitable for dry industrial environments; 2) Silicone/epoxy coating (thickness 0.05-0.1mm) over the plating, which is for humid or chemical environments.​

 

4. Structure Parameter Matching​

The total cross-sectional area of the busbar is determined by the number of copper strands. For example, a copper braided busbars for electrical used in 500A circuits needs 20-25 copper stranded wires (each with 19 soft bare copper wires). This ensures the structure meets current-carrying and anti-oxidation requirements at the same time.

 

 

Xiamen APOLLO's braided wire copper bus bar uses 99.99% high-purity copper strands. Its anti-oxidation treatment combines 3μm tin plating and silicone coating. It passes 72-hour neutral salt spray tests. It keeps conductivity ≥98.5% IACS. It withstands 15,000 bending cycles without oxidation. The product meets certifications like ISO9001-2015, IATF16949, ROHS, REACH. It also meets standards like GB and UL.​

 

We offer custom services. We can adjust braid density (80-95%), strand diameter (0.1-0.3mm), and anti-oxidation coatings (silicone/epoxy). These adjustments suit NEV, industrial, or marine scenarios. Our global logistics covers air, land, and sea. Air shipping takes 3-5 days to Asian clients. Land shipping takes 7-15 days to neighboring regions. Sea shipping takes 15-20 days to European and American clients. Our 24-hour after-sales team provides on-site anti-oxidation inspection and installation guidance. We ensure clients get oxidation-free, reliable busbars.