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Trial Number 1

Client Number 365

Project Number 1

Trial Purpose:

To evaluate the efficiency of three cleaners on GS 34 Soil-1 and GS 34 Soil- 2 from stainless steel coupons using immersion technique.

Date Run:

11/13/2014

Experiment Procedure:

Two sets of stainless-steel coupons were weighed. The first set was soiled with GS 34 Soil-1 and the other set was soiled with GS 34 Soil-2. Both soils were applied at the loading of ~100mg. The soiled coupons were oven dried for 30 minutes with 40 °C for GS 34 Soil-1 and 105 °C for GS 34 Soil-2. Dirty weights were recorded for all of the coupons.

The cleaning product was Elevance , which was diluted to 10%, 50%, and 100%. Three coupons were placed in a Gardner Straightline Washability unit and spray with a cleaning solution and allowed to soak for 20 minutes. After soaking, the unit was run for 20 cycles (33 seconds) followed by a quick spray rinse using tap water at room temperature. Final weights were recorded the following day. Efficiencies were calculated and recorded.

A third set of coupons for the maintenance soil was run with no dwell time of the cleaning solution. Product was sprayed on and with 10 seconds rinsed off with tap water.

Soil 1: Maintenance soil = 10 grams of carbon black, 10 grams iron oxide, 100 ml WD-40, 100 ml hydraulic oil, and 100 ml gear oil.
Soil 2: Production soil = 200 ml Quench Oil and 200 ml cutting oil

Chemistries Evaluated: Elevance 10%, Elevance 50%, Elevance 100%;

Trial Results:

Cleaner  Initial wt Final wt % Removed
ElevanceCleaner_10%      
GS34Production_StainlessSteel 0.1067 0.0044 95.88
  0.1055 0.0015 98.58
  0.0835 0.0021 97.49
ElevanceCleaner_50%      
GS34Production_StainlessSteel 0.0762 0.0072 90.55
  0.1032 0.0031 97
  0.1039 0.0022 97.88
ElevanceCleaner_100%      
GS34Production_StainlessSteel 0.116 0.0182 84.31
  0.111 0.0175 84.23
  0.1077 0.0056 94.8
ElevanceCleaner_10%      
GS34Maintenance_StainlessSteel 0.0796 0.0085 89.32
  0.1211 0.0068 94.38
  0.1123 0.0069 93.86
ElevanceCleaner_50%      
GS34Maintenance_StainlessSteel 0.0958 0.0051 94.68
  0.0972 0.0042 95.68
  0.0907 0.0035 96.14
ElevanceCleaner_100%      
GS34Maintenance_StainlessSteel 0.0995 0.0038 96.18
  0.0962 0.0031 96.78
  0.0958 0.0049 94.89

Success Rating:

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

Conclusion:

When cleaning the production soil, the efficiency decreased with increases in concentration. The highest performing cleaner for the production soil was the 1% dilution, followed closely by the 50% dilution and then the 100% dilution. For the maintenance soil, this trend was reversed, so the highest performing cleaner was the highest dilution. Each concentration was effective in cleaning the coupons. Based on the trends in effectiveness, the 50% dilution is recommended for cleaning applications.

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