How To Clean Metal After Welding. Several methods are commonly used to remove discoloration on stainless steel after welding electrochemical cleaning chemical pickling and mechanical grinding brushing are just few of them. The paste made from hydrofluoric acid and nitric acid is applied to the affected areas using a brush or spray then later removed and neutralized with a neutralizing agent.
You must remove the discolored layer to finish the steel. How do you clean after welding. Vinegar can be acidic at high temperatures and can cause corrosion.
It involves using a chemical pickling paste for cleaning after a welding job.
Mild steel does not require the surface to be super clean to get a good weld. Chemical cleaning is the most commonly used method for metal cleaning. The lemon dissolves the salt so it wont scratch the metal. The cleaning methods listed below can give better results.