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Trial Number 2

Trial Purpose:

To determine the effectiveness of three cleaners at different concentrations.

Date Run:

04/21/1999

Experiment Procedure:

Three chemistries form the previous test were made into 1 and 3 % solutions using DI water in 400 mL beakers. These solutions were then heated to 130 F on a hot plate.
Eighteen preweighed coupons were contaminated with the metal working fluid supplied by the client. Coupons were weighed after contamination. Three coupons were cleaned in each solution for three minutes using stir-bar agitation, then rinsed for 30 seconds in a tap water bath at 120 F. Drying was performed using Master Appliance orp, Hot-air gun model HG-301A at 500 F for one minute. Final weights were recorded and cleaning efficiencies were calculated.
SUBSTRATE MATERIAL: 304 Stainless Steel coupons
CONTAMINANTS: Metal working fluid (Hangsterfer’s S-500CF_US)
CONTAMINATING PROCESS USED: Coupons were contaminated using hand-held swab

Trial Results:

Each cleaner was effective at removing a vast majority of the metal working fluid from the coupons. Only one product was effective in removing 100% of the contaminant at each of the dilutions tested. Table 1 lists the cleaning efficiencies from the trial.

Table 1. Cleaning Efficiencies

Chemistry Branson GP Warren Chemical Matchless MC 580
Concentration 1% 3% 1% 3% 1% 3%
Coupon 1 98.76 99.81 100 100 99.07 98.43
Coupon 2 97.34 99.76 100.22 101.05 99.05 99.17
Coupon 3 99.2 99.05 99.77 99.85 98.38 99.8
Ave 98.43 99.54 100 100.3 98.84 99.13
Std Dev 0.97 0.42 0.22 0.65 0.39 0.69

Warren Chemical performed well at all three dilutions.  The Branson and Matchless products cleaned comparably at each concentrations.  Table 2 lists the average cleaning efficiencies for each cleaner.

Success Rating:

A follow up test, usually based on company input.

Conclusion:

Warren Chemical Sea Wash Dispersant was effective in removing 100% of the metal working fluid at the three concentrations tested.  The Branson GP and Matchless MC 580 cleaned at the same levels for each dilution evaluated.  The next phase will be to clean client supplied parts using the three chemistries tested here, at 5%, as well as tap water.  Evaluation will be performed using OSEE.