I note that both you and
@kevstar have been welding galvy recently.
Tis not something I would do, after having been told very firmly by a pro about the harm it can do.
And even grinding it off first should only be done in special conditions.
Hmm!
hope you both haven't suffered too much and nothing is long lasting.
I expect you'll both be OK as it wasn't "prolonged".
What happens when you weld galvanized steel?
When you expose galvanized steel to high temperatures during welding, the zinc coating evaporates, releasing toxic zinc oxide fumes and creating health and safety hazards.
Inhaling zinc oxide fumes can cause symptoms such as nausea, chills, fever, and muscle aches. These symptoms together are sometimes known as “metal fume fever”. Prolonged exposure to zinc fumes can cause serious health issues. Welding galvanized steel can also result in increased spatter and smoke, which can be hazardous and affect the quality of your work environment.
The quality of the welding job can also be affected. The presence of zinc during welding can create defects in the weld, such as porosity or inclusions, which weaken the joint.
Can you weld galvanized steel safely?
Although not recommended, you can still weld galvanized steel. However, it requires careful preparation and precautions to ensure your safety and the quality of the weld. Here are some steps to follow:
- Proper ventilation: Welding should always be done in a well-ventilated area, but it’s even more crucial when working with galvanized steel.
- Wear appropriate safety gear: Ensure you are wearing appropriate personal protective equipment (PPE), including a welding helmet, gloves, and respiratory protection.
- Clean the surface: Before welding, grind away the zinc coating from the areas you intend to weld. This prevents the release of zinc fumes and ensures better weld quality.
- Use low heat: Reduce heat input by using lower amperage and voltage settings on your welding equipment. This helps minimise the evaporation of zinc