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Hazards of Burning Galvanized Steel: Risks & Health Impacts
Galvanized steel is coated with zinc. Burning or welding it releases toxic fumes and particulates.
Primary Hazards
- Metal fume fever – acute flu-like illness (chills, fever, myalgia, cough, dyspnea) from zinc oxide inhalation; onset 4–12h post-exposure, resolves 24–48h.
- Toxic metal exposure – lead, cadmium, chromium impurities in zinc coating; chronic exposure → neurotoxicity, nephrotoxicity, carcinogenicity.
- Respiratory irritation – cough, bronchitis, asthma exacerbation.
- Environmental contamination – heavy metals persist in soil, water, food chain.
- Fire/explosion risk – zinc dust can form explosive mixtures.
Safety Measures
- Avoid burning galvanized steel; use mechanical removal, chemical stripping, or cold cutting.
- If hot work unavoidable: local exhaust ventilation, supplied-air respirator (PAPR), PPE.
- Follow OSHA zinc oxide PEL (5 mg/m³ TWA).
- Dispose of residues as hazardous waste.
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