Metal inert gas (MIG) welding presents various hazards, including arc flash exposure, molten metal spray, dangerous metal vapors and noise hazards when grinding. However, by following these tips from
MIGWelding: The DIY Guide, some of these risks can be mitigated.
- Protect all skin from ultraviolet light generated during welding, including arms and legs which can become severely sunburned while welding. Wear heavy clothing because light layers can be burned through by molten blobs of metal spit out by the weld.
- Do not look directly at a welding arc, even for a short time, as this causes the arc flash to burn the cornea, resulting in severe pain.
- Warn others in the area before starting to weld and use a welding screen when there is potential for passersby.
- Zinc coatings should be removed from galvanized steel prior to welding, as fumes from these coatings can cause heavy metal poisoning, a flu like condition that lasts several days.
- All welding should be performed in a well-ventilated area to protect welders from fumes that emit chromium and ozone.
- If extraction is not ideal, wear a vapor mask.
- Perform a risk assessment of the area in which you weld. Molten metal can spit several feet away, and any objects or debris, such as sawdust, that can easily catch fire must be removed from the work area.
- Keep a fire extinguisher next to the exit door of your workspace. This extinguisher should be ready to use, with the plastic tie removed for immediate response to a potential fire.
- Wear ear protection when using grinders, hammers and drills.
- When grinding, wear goggles with impact-resistant lenses that do not have direct air breathing holes that may allow sparks to enter.
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