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To evaluate semi-aqueous products on the first supplied lubricant.
Three products from the previous trial were retested at 10% dilutions. In addition, six non-aqueous products were selected from the lab's on-line database, www.cleanersolutions.org based on client supplied information and past product performance. One product was diluted to with DI water to 10% in 600 ml beakers. The other five products were used at full strength. The cleaning solutions were all heated to 130 F on a hot plate.
Twenty-seven preweighed alloy coupons were coated with the first supplied lubricant and weighed a second time to determine the amount of contaminant added to each coupon. Three coupons were immersed into each solution and cleaned for 5 minutes using stir-bar agitation. Coupons were rinsed in room temperature tap water for 15 seconds and air dried using compressed dry air for 30 seconds. A final weight was recorded and efficiencies were calculated for each coupon cleaned.
All five products used at full strength removed over 75% of the lubricant. Three of these removed over 93% and one of these (Solsafe 245) removed over 97%. The three products from the previous trial did not improve with an increase in concentration from 5 to 10%. The table below lists the amount of soil added, the amount remaining and the efficiency for each coupon cleaned.
|Cleaner||Initial wt||Final wt||% Removed|
|Ionox HC 2||1.2543||0.8456||32.58|
|Soy Gold 1100||0.9363||0.1518||83.79|
|D Greeze 500 LO||1.3857||0.0932||93.27|
Success Rating:Results suggest a scale-up feasible match for cleaning chemistry and equipment. Pilot plant study with actual parts recommended.
The five semi-aqueous products will be evaluated for the cleaning of the second supplied contaminant under similar conditions.