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Trial Number 3

Trial Purpose:

To evaluate supplied products for Green Seal GS 34 soil removal at a higher concentration of cleaning product.

Date Run:

08/25/2016

Experiment Procedure:

There are two types of Green Seal GS 34 soil; one being maintenance soil and the second being production soil. The two types of soils were prepared individually. The first soil, maintenance soil, consisted of 10 grams of carbon black, 10 grams of iron oxide, 100 mL WD-40, 100 mL hydraulic oil, and 100 mL gear oil. Each component was placed in a 750 mL beaker and mixed for 20 minutes at room temperate 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 pre-cleaned and pre-weighed stainless steel coupon onto one side only with a hand held swab. The maintenance soils for all three coupons were baked in an oven for 30 minutes at a temperature of 40oC (105F). For the production soil, three coupons were baked in an oven for 30 minutes at a temperature of 105 oC (220F). The coupons were then allowed to cool to room temperature and weighed a second time. A 10% diluted cleaning solution was prepared in a 600 mL beaker to make a total of 500mL of cleaning solution; the solution consisted of 450 mL of water and 50mL of the corresponding cleaning product. A 20% diluted cleaning solution was prepared in a 600 mL beaker to make a total of 500 mL of cleaning solution; the solution consisted of 400 mL of water and 100 mL of the corresponding cleaning product.
The following cleaning procedure was used for the 10% and 20% diluted cleaning products. Three stainless steel coupons were suspended into each 500mL diluted cleaning product solution, allowing the entire contaminated surface to be submerged in the cleaning solution. The coupons were washed for 20 minutes using immersion cleaning only at room temperature.
The washing was followed by two rinse steps. The coupons were drained for 30 seconds prior to each rinse step, for reach rinse step a 20 minute soak in water 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 oC for 30 minutes. The coupons were then cooled to room temperature and final weights were measured.

Trial Results:

At 10% Dilution Cleaning Solution:
Contaminants Cleaner Initial wt Final wt % Removal % Avg % Overall
Production Soil Logos 62.8580 62.8913 66.57    
    62.6971 62.7434 47.51    
    62.6148 62.6617 47.66 53.91  
Maintenance Soil Logos 62.1318 62.2209 10.00    
    62.6390 62.7297 10.02    
    62.7564 62.8439 10.16 10.06 31.99
Production Soil Simple Green  64.2918 64.3145 62.42    
    63.9835 64.0232 60.02    
    62.8308 62.8554 65.16 62.53  
Maintenance Soil Simple Green  62.6179 62.7087 10.19    
    62.3932 62.4821 10.11    
    62.6750 62.7652 10.52 10.27 36.40
At 20% Dilution Cleaning Solution:
Contaminants Cleaner Initial wt Final wt % Removal % Avg % Overall
Production Soil Logos 60.8405 60.8961 45.44    
    60.9246 60.9735 47.70    
    60.4788 60.5264 52.16 48.43  
Maintenance Soil Logos 60.7493 60.8299 12.01    
    60.4771 60.5647 9.88    
    60.6745 60.7613 3.98 8.62 28.53
Production Soil Simple Green  60.5426 60.5662 75.05    
    61.0394 61.0795 48.52    
    59.3723 59.4125 59.27 60.95  
Maintenance Soil Simple Green  60.3495 60.4338 13.54    
    60.8348 60.9225 10.78    
    60.5609 60.6463 11.23 11.85 36.40

Success Rating:

Test incomplete or inconclusive.

Conclusion:

Both cleaning products were not effective at removing the maintenance and production soil at 10% and 20% dilution of the cleaning product, because a typical effective cleaning product would have a percent removal of 85% or higher. There was not a noticeable amount of percent removal difference with an increase of the cleaning product concentration from 10% to 20%. However, the cleaning product Simple Green GS was slightly more effective at removing the soil compared to the cleaning product from Logos. In addition, both cleaning products were more effective at removing production soil than maintenance soil. There are no signs of corrosion on the substrates.

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