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To evaluate selected vapor degreasing solvents on first oil.
Six products were selected based on client request for vapor degreasing solvents. Each product was used at full strength in a 250 ml beaker and heated to 96 F on a hot plate.
Eighteen preweighed aluminum coupons were coated with the Soltex Polybutene 32 (9003-29-6) using a hand held swab. Coupons were weighed a second time to determine the amount of soil added to each coupon. Three coupons were cleaned in each solution for 5 minutes using stir-bar agitation. After cleaning parts were weighed a final time and efficiencies were calculated.
Four of the products, 71DE, AK 225, CCA and MCA, removed over 94% of the soil in the five minutes of immersion cleaning. The other two products removed less than 20%. Even after increasing cleaning time to ten minutes, these two products had only marginal success, removing less than 40%. The table below lists the amount of soil added, remaining and efficiencies for each coupon cleaned.
|Cleaner||Initial wt||Final wt||% Removed|
|HFE 7100 (10 min)||0.6255||0.4209||32.71|
|HFE 7200 (10 min)||0.2486||0.2059||17.18|
Success Rating:Results successful using TACT (time, agitation, concentration, and temperature, as well as rinsing and drying) and/or other cleaning chemistries examined.
Longer cleaning time (30 minutes) may help to improve the effectiveness of 7100 and 7200. Increasing the temperature of all the products could also improve the removal of this soil.
All six products will be tested on the second supplied soil.