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To evaluate the effectiveness of cleaners for the removal of grease on aluminum coupons using a stir bar at 300 rpm for 15 minutes unheated immersion
Four of six cleaning products were diluted with tap water at room temperature to vendor recommended concentrations. One cleaning product was used at the recommended 100% dilution and the solvent option was also used at 100% concentration for industrial testing; all cleaners and solutions were measured for 200 mL and poured into beakers. Pre-weighed aluminum coupons were coated over 1/3 of the surface with grease that has been provided by the company by using a metal spatula; three coupons were used for each cleaner/solvent. They were allowed a 72-hour dry time at room temperature; their dirty weights were recorded. A stir bar was added to each beaker and was set to 300 RPM. The coupons were immersed in the cleaners/solvents at room temperature for 15-minutes, then were taken out and placed on trays with paper towels; they were blown dry for 2 minutes and then left to finish drying for 24 hours. Final weights and observations were recorded and evaluated. The removal goal based on client needs is between 70-90%.
Cleaner/Solvents used and their concentration:
Ozzy Juice 3 was most effective for the removal of grease from aluminum substrates with an average of 27.23% removal; the coupon was still coated 1/3 of the surface with grease but was not as thick as it was before cleaning. Micro 90 had an average removal of 16.12%, and visually a thick coating was left on the coupon. Other cleaners/solvents recorded were below 10% removal and visually did not change. Increasing the concentration for SC-Aircraft, and continuing with a stir bar in unheated immersion with more time added are the next steps.
Success Rating:A follow up test, usually based on company input.
All cleaners and solvents were below the desired percentage removal of 70-90%. Next steps include adding time onto the unheated immersion test with a stir bar and increasing SC-Aircraft to a concentration of 1:1 which is recommended for tough greases by the vendor. Additionally, the product Super Solve will be added to the list of cleaners and will first be tested at 50% concentration.