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Trial Number 1

Trial Purpose:

To reevaluate selected cleaners under heated conditions.

Date Run:


Experiment Procedure:

Eight cleaners were selected from the previous trial. The same six solutions were diluted with DI water to five percent by volume in a 600 ml beaker. The other two products were diluted to 10% as suggested by the vendor. All eight solutions were heated to 130 F on a hot plate.
Twenty-four preweighed coupons were coated with the supplied oil and weighed again. Three couponswere cleaned in a solution for five minutes at room temperature using stir-bar agitation. After cleaning the coupons were rinsed for 15 second in tap water at 120 F and allowed to air dry for two hours. Following the drying, final clean weights were recorded and efficiencies were calculated.
CONTAMINANTS: Oil-Texaco Lubricant Company Cleartex D (CAS#: 64742-65-0, 68527-02-6)
CONTAMINATING PROCESS USED: Coupons were coated with oil using a hand held swab.

Trial Results:

Heating the solutions improved the cleaning efficiencies for all eight cleaning solutions. Chrisal, SWR Corp, Oakite and Envirosolutions each removed over 90% of the contaminant from the coupons. Table 2 lists the calculated efficiencies for each trial and compares them to the results form Trial 2.

Table 2. Heated Cleaning

Cleaner Alconox Chrisal Savorgran SWR Corp  Valtech C&D Oakite Envirosolutions
Coupon 1 60.87 97.78 61.66 97.04 76.92 79.64 96.93 83.62
Coupon 2 66.03 98.72 63.27 97.26 94.19 76.02 97.71 96.48
Coupon 3 47.72 98.36 64.56 99.01 83.89 82.81 96.85 97.81
Average 58.21 98.29 63.17 97.77 85 79.49 97.16 92.64
Trial 2 52.02 82.9 47.94 71.25 66.55 54.25 78.41 67.7

Success Rating:

A follow up test, usually based on company input.


Heating the solutions improve the removal of the oil from the brass coupons.  The solutions with efficiencies over 70% will be evaluated next for removing the rosin solder flux.

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