FREICLEAN 70 is a low foaming, mildly alkaline cleaner for steel and non-ferrous work. FREICLEAN 70 may be used by spray or immersion application and is a liquid material for ease of handling.
FREICLEAN 70 is usually built up at concentrations of 2 to 6 oz/gal (1 to 5 % by volume) depending on the soils to be removed. The normal temperature range is 90°F to 180°F with processing times of 60 to 120 seconds by spray and 5 – 15 minutes by immersion.
The concentration of the FREICLEAN 70 solution may be determined by one of the following methods:
Pipette a 25 ml sample of the solution to be tested into a 125 ml Erlenmeyer flask or suitable beaker and add 10 to 15 drops of Indicating Solution 2 (Bromocresol Green) and titrate the blue solution with Testing Solution 20 (0.1N H2SO4) to a yellow endpoint.
% by volume FREICLEAN 70 = 0.210 x mL’s of Testing Solution 20
Drop Test Method:
Using a 1 ml dropper or syringe, deliver a 1 ml sample of the FREICLEAN 70 solution to be testing into a 150 ml beaker and add 2-3 drops of Indicating Solution 2 (Bromocresol Green). Add Testing Solution 20 (0.1N H2SO4) drop wise counting the drops required to change the blue solution to a yellow endpoint.
% by volume FREICLEAN 70 = 0.21 X drops Testing Solution 20
A 5% solution of FREICLEAN 70 will require approximately 23-24 drops.
NOTE: When a large percentage of the work processed is aluminum, determination of concentration by alkali titration may lead to erroneous results, as the aluminum in solution will interfere with the titration.
A satisfactory method of control is to make an addition of FREICLEAN 70 whenever the cleaning ability begins to fall off. With experience, a definite replenishing schedule can be worked out 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.
If you are unable to find what you need or require a custom formula, please call and speak with one of our knowledgeable Formula Engineers. They can walk you through the ordering process quickly and professionally.
Freiborne Industries, Inc is proudly powered by WordPress
Freiborne Industries has been providing chemical solutions and service to the metal-forming industry for more than forty years. Our sustainability is due to our ability to earn and maintain a reputation for consistently developing, manufacturing and selling quality products and services, which are a long term value to our customers.