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Toxics Use Reduction Institute · Surface Solutions Laboratory
 
Toxics Use Reduction Institute




Surface Solutions Laboratory

Trial Report



Trial Number 0

(Client Number 220, Project Number 1)

Trial Purpose: To evaluate selected vapor degreasing solvents on first oil.

Date Run: 04/13/04

Experiment Procedure:
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.

Trial Results
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               0.6255        0.4415        29.42
                               0.3452        0.3569        -3.39
                               0.5307        0.5216          1.71
HFE 7200               0.2486        0.2254          9.33
                               0.4331        0.3800        12.26
                               0.4522        0.2914        35.56
HFE 71DE              0.4494        0.0091        97.98
                               0.3842        0.0171        95.55
                               0.4593        0.0062        98.65
AK 225                   0.3207        0.0157        95.10
                               0.5828        0.0309        94.70
                               0.5086        0.0393        92.27
HFE 7100 (10 min)  0.6255        0.4209        32.71
                               0.3452        0.3468         -0.46
                               0.5307        0.4635        12.66
HFE 7200 (10 min)  0.2486        0.2059        17.18
                               0.4331        0.2221        48.72
                               0.4522        0.2140        52.68
Vertrel CCA             0.8681        0.0234        97.30
                               0.5975        0.0041        99.31
                               1.0897        0.0532        95.12
Vertrel MCA             0.4396        0.0211        95.20
                               1.0074        0.0182        98.19
                               0.6466        0.0126        98.05


Success Rating
Results successful using TACT (time, agitation, concentration, and temperature, as well as rinsing and drying) and/or other cleaning chemistries examined.

Conclusion
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.