ACID: ETCHING,4GL, USE 0AKITE33=31

OAKITE® 33 is a liquid acidic compound designed for removing light grease, oils, shop dirt, flux, rust, oxides and heat scale and for preparing metals for painting. It is also used for cleaning and conditioning aluminum prior to surface conversion processing. Another application, recommended by stainless steel manufacturers, is the use of OAKITE® 33 for cleaning stainless steel to remove dirt and embedded soils in the metal.

APPLICATION

• By tank immersion - use at 5% to 25% by volume at 27° to 60°C (80° to 140°F) followed by rinsing and drying
• For Wipe-on-methods - use at 10% to 50% by volume at room temperature. Apply with rags or brushes, allow to soak for 2 to 20 minutes, rinse and wipe dry
• Solution Control: Concentrations are titrated using Gardotest Procedure 128. Sample Size: 1.0 mls Factor: 6.5

SPECIFICATIONS

• Chemical composition: phosphoric acid, solvents and surfactants
• Physical form: liquid
• Color: tan
• Odor: mild
• Specific gravity (approx): 1.345 at 20°C (68°F)
• Bulk density: 1345 g/l (11.2lb./gal)
• Viscosity: 34 to 40 cps at 20°C (68°F) Brookfield Spindle 1, 60 rpm
• Flash point (undiluted): none
• Hygroscopic tendency: slight
• Foaming tendency: moderate when circulated; severe when sprayed
• Recommended diluent: water
• Maximum solubility: complete
• Behavior in hard water: solubilizes hard water salts
• Rinsability: good with hot water; fair with cold water
• Biodegradable surfactants: yes
• Phosphate-free: no
• Normal working concentrations: 2 to 50% by volume
• Normal working temperatures: 27° to 60°C (80° to 140°F)
• pH at working concentrations: under 2.0 at 21°C (70°F)
• Effect of prolonged boiling: loss of solvent