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Trial Number 0

Client Number 384

Project Number 1

Trial Purpose:

To evaluate various concentrations of supplied products for Green Seal GS 34 degreasing standard.

Date Run:

05/21/2013

Experiment Procedure:

Two types of soils were prepared individually. The first soil, maintenance soil, consisted of 10 grams of carbon black, 10 grams iron oxide, 100 ml WD-40, 100 ml hydraulic oil, and 100 ml gear oil. Each component was placed in a 750 beaker and mixed for 20 minutes at room temperature using a magnetic stirrer. The second soil, production soil, was made by mixing 200 ml Quench Oil and 200 ml cutting oil for 20 minutes at room temperature using a magnetic stirrer in a second 750 ml beaker.

Approximately 100 mg of each soil was applied to a precleaned and preweighed stainless steel coupon onto one side only with a hand held swab. No soil was applied to the two control coupons. The maintenance soil for all three coupons was baked in an oven for 30 minutes at a temperature of 40° C (105 F). For the production soil, all three coupons were baked in an oven for thirty minutes at 105° C (220 F). The coupons were then allowed to cool to room temperature and weigh a second time (soiled mass = B).

Both cleaning products were diluted to 10:1 (~9.09%). The solution was preheated to 40 C (105 F). Six 600 mL beakers were filled with enough fresh degreaser solution to completely submerge the coupons in the degreasing solution without any overflow. The six beakers were suspended in the heated tank and allowing the temperature in the cleaning bath and beakers to equilibrate.

Coupons were suspended in each beaker, allowing the entire contaminated surface to be submerged in the cleaning solution. The coupons were washed for 20 minutes using immersion cleaning only. The washing was followed by two rinse steps. The coupons were drained for 30 seconds prior to each rinse step. For each rinse step a 20 minute soak was utilized. After the two rinse steps, all coupons were first allowed to air dry for 30 minutes and then dried in an oven at 105° C for 30 minutes. The coupons were then cooled to room temperature and final weights were measured (mass of the coupon after cleaning = C).

Chemistries Evaluated: 9.1% Simple Green, 9.1% Super Green, 100% Simple Green, 100% Super Green

Trial Results:

The supplied cleaning product was not successful at removing the Maintenance soil using immersion cleaning at 105F. However, the more than 90% of the Process soil cleaning was removed by both products when used at the diluted level. Full strength products were more effective (>80%) on the maintenance soil.

Cleaner Initial wt Final wt % Removed
Simple Green 9.1% - GS34 S&M      
  0.0797 0.0545 31.62
  0.0914 0.0770 15.75
Simple Green 9.1% - GS34 PROD      
  0.1049 0.0073 93.04
  0.1069 0.0001 99.91
Super Green 9.1% - GS34 S&M      
  0.0917 0.0800 12.76
  0.0941 0.0613 34.86
Super Green 9.1% - GS34 PROD      
  0.1048 0.0050 95.23
  0.1058 0.0159 84.97
Simple Green 100% - GS34 S&M      
  0.0932 0.0193 79.29
  0.0921 0.0011 98.81
Super Green 100% - GS34 S&M      
  0.0897 0.0288 67.89
  0.0864 0.0037 95.72

Success Rating:

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

Conclusion:

The 9.1% dilutions were not effective at removing the maintenance soil from the coupons. The pure dilutions were effective at removing the production and maintenance soil from the coupons.

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