FREICLEAN 72 is a liquid, alkaline, heavy duty cleaner for steel. The cleaner may be used for spray or immersion applications. FREICLEAN 72 is designed to remove phosphate and lubricant soils from steel work. Oily soils may be skimmed from the surface of the cleaning solution and stearate lubricant soils will not gel in the cleaning solution at ambient temperatures.
Liquid, alkaline, heavy duty cleaner for steel designed to remove phosphate and lubricant soils from steel work. Oily soils may be skimmed from the surface of the cleaning solution and stearate lubricant soils will not gel in the cleaning solution at ambient temperatures.
FREICLEAN 72 may be used at concentrations of 5 -10% by volume with operating temperatures of 150-200F. The normal processing time is 30-90 seconds for spray applications and 3-10 minutes for immersion applications. For optimum removal of heavy phosphate coatings, a concentration of 10% by volume at 190°F with immersion time of 5 minutes or more is recommended.
The concentration of the FREICLEAN 72 solution may be monitored by titration of the total alkali as follows:
Pipette a 2 ml sample of the FREICLEAN 72 solution into a suitable beaker or Erlenmeyer flask and add 4 drops of Indicating Solution 3 (Phenolphthalein). Titrate the pink solution with Testing Solution 20 (0.1N H2SO4) until the pink color is just removed from the solution.
A FREICLEAN 72 solution prepared at 10% by volume will have a titration reading of approximately 16.4 points Testing Solution 20.
Addition of 6.1 gals (70 lbs) of FREICLEAN 72 per 1000 gals will raise the titration by 1 point.
FREICLEAN 72 weighs 11.5 lbs/gal. and has a specific gravity of 1.380.
CAUTION: This material is strongly alkaline and may cause burns to skin and eyes, which will maintain the cleaner in good condition. When contaminants accumulate to the extent where they interfere with cleaning, the cleaner should be dumped and rebuilt.
Carbon Steel, Stainless Steel
Drawing, Stamping, Extrusion, Paint Pretreatment, Protection, Cleaning, Metal Working, Rubber-Metal Bonding
Spray or Immersion
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