Chemicals & Markers

The consumable chemistry around welding - protecting consumables, preparing and passivating surfaces, inspecting welds and marking out work.

Anti-spatter

Spray and gel-dip anti-spatter stop molten spatter bonding to nozzles, tips and the workpiece. Water-based formulations are the safer choice where the work will later be painted or coated, because solvent residues cause adhesion failures that show up after finishing, not before. Nozzle gel is for dipping the gun front end; spray is for the work and the fixturing.

Surface preparation and passivation

Stainless steel pickling paste removes the heat tint and the chromium-depleted layer left by welding. Skipping this step is why stainless fabrications rust along the weld line in service - the tint is not cosmetic, it is a corrosion site. Cold galvanizing compound restores zinc protection on galvanised steel after welding, which is otherwise a guaranteed rust point.

Weld inspection

Dye penetrant kits reveal surface-breaking cracks and porosity on non-porous materials. It is the cheapest inspection method available and takes minutes.

Markers

Paint markers and soapstone for layout on hot, oily and rough material where a pencil is useless.

Handle and store properly

Aerosols, solvents and pickling acids each have their own storage and ventilation requirements. Pickling paste in particular is an acid - read the data sheet, and do not improvise PPE around it.

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