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Trial Number 6

Trial Purpose:

To evaluate the effectiveness of heated dimethyl glutarate (130F) on removing Mystery Oil and Rustlick 50/50 on ceramic, copper, and aluminum coupons.

Date Run:

08/15/2019

Experiment Procedure:

Nine pre-weighed coupons, three for each substrate, were used for each contaminant, and the coupons were contaminated halfway on one side using a hand-held swab. Contaminated weights were recorded before immersing three coupons of the same substrate into a beaker with heated (130F) dimethyl glutarate for 15 minutes. Visual observations were documented every five minutes for the complete 15 minutes before taking final weights.  

Trial Results:

Soil Substrate Initial wt. of cont. Final wt. cont. % Cont. Removed Average
Soluble Oil #35 Ceramic 2.0268 -0.0001 100.0049 96.10
0.0344 0.004 88.3720
0.9067 0.0008 99.9117
Copper 0.0207 0.0004 98.0676 98.93
0.0233 0.0003 98.7124
0.0432 0.0000 100.0000
Aluminum 0.0067 0.0000 100.0000 98.40
0.0145 0.0007 95.1724
0.008 0.0000 100.0000
Rustlick 50/50 Ceramic -0.7849 0.0088 101.1212 101.67
0.3119 0.0002 99.9359
0.0456 -0.0018 103.9474
Copper 0.1686 0.0007 99.5848 98.22
0.0797 0.0031 96.1104
0.106 0.0011 98.9623
Aluminum 0.0922 0.0060 93.4924 95.03
0.1668 0.0048 97.1223
0.0885 0.0049 94.4633

Visual Observations:

Contaminant: Mystery Oil (Soluble Oil #35)

Substrate 5 Mins 10 Mins 15 Mins
Ceramic

- no visible bubbles

- clear dilution

- no visible bubbles

- clear dilution

- no change

 

 

Copper

- no visible bubbles

- clear dilution

 

- no visible bubbles

- clear dilution

- no change
Aluminum

- no visible bubbles

- clear dilution

- no visible bubbles

- clear dilution

- no change

 Contaminant: Rustlick 50/50

Cleaner 5 Mins 10 Mins 15 Mins
Ceramic

- soil visibly removing from coupon

- soil rising to top of dilution

- soil visible at top of solution

- soil visible at top of solution

- solution blue

 

Copper  - soil rising to top of solution - soil visible at top of solution

- soil visible at top of solution

- solution blue

 

Aluminum

- soil rising to top of solution

 

- soil visible at top of solution

- soil visible at top of solution

- solution blue

 

Success Rating:

Results suggest a scale-up feasible match for cleaning chemistry and equipment. Pilot plant study with actual parts recommended.

Conclusion:

Heated dimethyl glutarate was effective at removing Mystery Oil or Rustlick 50/50. Next step is to test on parts provided by the client.

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