In the wire and cable industry, many manufacturers focus solely on whether the material is “halogen-free,” often overlooking the corrosivity of the gases released during combustion. The IEC 60754 standard is the core “gatekeeper” for assessing this safety risk.
The Invisible Killer: Halogen Acid Gas
When halogen-containing cables burn, they release corrosive acid mists that harm respiratory tracts and destroy electronic equipment. IEC 60754 quantifies this risk through two dimensions:
- Quantity (IEC 60754-1): Measures the total halogen acid gas. To be classified as “halogen-free,” the content must be ≤ 5mg/g.
- Quality (IEC 60754-2): Evaluates corrosivity via pH and conductivity. Standard requirements are typically pH ≥ 4.3 and conductivity ≤ 10μS/mm.
Why Precision Matters
To ensure full compliance with international standards, a modern test apparatus must excel in these key areas:
1.Corrosion-Resistant Design: Core components (combustion tubes) must use high-purity quartz or borosilicate glass to prevent acid corrosion and gas leakage.
2.Efficient Gas Absorption: Built-in high-speed magnetic stirrers in the collection bottles create a vortex, maximizing the absorption efficiency of halogen acid gases and ensuring accurate pH and conductivity readings.
3.Intelligent User Interface: Large touchscreen panels with intuitive software allow operators to easily set parameters and monitor real-time curves, significantly lowering the technical barrier for lab staff.
Extended Knowledge: Halogen-Free ≠ Non-Toxic
It’s crucial to note that halogen-free cables are not necessarily non-toxic. Incomplete combustion can still produce carbon monoxide (CO). High-end applications (e.g., subways, nuclear plants) often require combining IEC 60754 with NES 713 (Toxicity Index) and IEC 61034 (Smoke Density) for a comprehensive safety assessment.
Conclusion
Equipping an IEC 60754 compliant apparatus is not just for passing inspections, but also the confidence to optimize R&D formulas and ensure product compliance.
Looking for a precise and easy-to-operate halogen acid gas testing solution? Contact us today for detailed specs and standard documents!