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

Surface Solutions Laboratory

Trial Report

Trial Number 4

(Client Number 27, Project Number 2)

Trial Purpose: To evaluate top five products on fourth supplied contaminant using manual cleaning

Date Run: 11/03/09

Experiment Procedure:
Five products from the previous trials were selected based on performance. All were used at room temperature. Two alkaline aqueous cleaners were diluted to 5% using DI water in 300 ml beakers. Three cleaners were used at full strength. Fifteen preweighed aluminum coupons were coated with Mobile DTE 25 oil using a hand held swab. The contaminated coupons were weighed again to determine the amount of soil added.

Each cleaner tested with three coupons. Three coupons were placed into a Gardner Straight Line Washability unit. A Kimberly Clark Reinforced paper towel was attached to the cleaning sled and soaked with 5-7 sprays of cleaning solutions. Each coupon was sprayed 3 times with the same cleaning solution. First, Coupon was cleaned for 15 cycles two times; after coupon was cleaned for 15 cycles, experimenter changed the paper towel and soaked with 5 spray of same cleaning solution. At the end of the cleaning, coupons were dried at room temperature naturally. Final weights were recorded and efficiencies were calculated and recorded.

Trial Results
Four of the products removed more than 90% of the oil from the aluminum coupons using simulated manual cleaning. The fifth removed less than 80%. The
table lists the amount of soil added, the amount remaining and the efficiency for each coupon cleaned.

Cleaner Initial wt   Final wt     % Removed
Shopmater RC 100%                        
        0.0428        0.0129        69.86
        0.0439        0.0085        80.64
        0.0346        0.0091        73.70
SC Aircraft metal cleaner 5%                        
        0.0178        0.0010        94.38
        0.0165        0.0026        84.24
        0.0199        0.0008        95.98
Solsafe 245 100%                        
        0.0302        0.0021        93.05
        0.0295        0.0022        92.54
        0.0211        0.0014        93.36
Detergent 8 5%                        
        0.0151        0.0016        89.40
        0.0148        0.0009        93.92
        0.0179        0.0015        91.62
        0.0421        0.0022        94.77
        0.0290        0.0008        97.24
        0.0341        0.0019        94.43

Success Rating
A follow up test, usually based on company input.

Based on past performance on the previous four contaminants, all five products will be tested on the fifth supplied contaminant under the same conditions.