Heavy Duty Weld Cleaning Electrolyte Size 5.2 Gallon For Use With Mfr No 54D114 54D214 Features Free From Hydrofluoric Acid And Nitric Acid NSF Registered For Food Plant Applications Removes Light Scaling Formulated For The Most Demanding TIG Spot And Pulsed MIG Weld Cleaning Applications Application Used With SURFOX System For Cleaning Weld Discoloration On Stainless Steel Standards NSF Registered ASTM A967 Certified Chemical Passivation for Stainless Steel