Why should solvents and paints be kept away from welding areas, and what hazards can they pose?

• A. Dust can contaminate welds and weaken joints.
• B. They cause only odor hazards; use fans.
• C. Dust has no effect on safety during welding.
• D. Dust only affects visibility and can be ignored.

Answer: (C)

Solvents and paints near welding areas pose serious fire, explosion, and health hazards because they release flammable vapors and toxic fumes when heated or disturbed. The vapors can ignite from sparks, arcs, or hot metal, and in a confined space they can flash or even explode. Heating coatings or solvents also sends out fumes that irritate the eyes, nose, and throat and can affect breathing; prolonged exposure or high concentrations can be more dangerous. In addition, residues from solvents or oils on the workpiece surface can contaminate the weld, leading to poor weld quality such as porosity or weak joints. Even rags soaked with solvent can ignite spontaneously if not stored or disposed of properly. For safety, keep solvents and paints away from welding areas, ensure good ventilation, store them in approved containers, and remove any residues from the work area before welding.