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Trial Number 1

Trial Purpose:

To evaluate six cleaning products for Mystery Oil (Soluble Oil #35) and Rustlick 50/50 removal from copper coupons.

Date Run:

07/19/2019

Experiment Procedure:

Six pre-weighed copper coupons, three for each contaminant, was used for each cleaner. The coupons were soiled halfway on one side using a hand-held swab before dirty weights were recorded. Dilutions and temperature for each cleaner was based on vendor recommendations. Coupons of the same contaminant were immersed completely for 15 minutes, and visual observations were recorded every five minutes. Cleaned coupons were rinsed in heated     (95o F) tap water for five minutes, air dried for five minutes with a heat gun, and then final weights were recorded.

Trial Results:

 

Cleaner Soil Initial wt. of cont. Final wt. cont. % Cont. Removed Average Overall Average
1 Mystery Oil 0.1195 0.0008 99.33054 98.24 92.34
0.148 0.0057 96.14865
0.1476 0.0011 99.25474
Rustlick 50/50 0.1407 0.0199 85.85643 86.43
0.2062 0.0253 87.73036
0.1359 0.0194 85.7248
2 Mystery Oil 0.1403 0.0073 94.79686 95.50 88.43
0.1501 0.0065 95.66955
0.1558 0.0062 96.02054
Rustlick 50/50 0.206 0.029 85.92233 81.37
0.1576 0.0323 79.50508
0.1665 0.0355 78.67868
3 Mystery Oil 0.1395 0.0072 94.83871 96.22 90.19
0.1227 0.004 96.74002
0.0992 0.0029 97.07661
Rustlick 50/50 0.1946 0.0322 83.45324 84.16
0.2079 0.0363 82.53968
0.1865 0.0252 86.48794
4 Mystery Oil 0.1094 0.0015 98.62888 96.26 90.54
0.1263 0.0019 98.49565
0.1581 0.0132 91.65085
Rustlick 50/50 0.2087 0.0315 84.90656 84.81
0.1429 0.025 82.50525
0.1711 0.0222 87.02513
5 Mystery Oil 0.1375 0.0017 98.76364 99.33 89.52
0.2621 0.0007 99.73293
0.1214 0.0006 99.50577
Rustlick 50/50 0.206 0.052 74.75728 79.71
0.2771 0.0574 79.28546
0.1959 0.0292 85.09444
6 Mystery Oil 0.0899 0.0071 92.10234 94.03 91.01
0.0988 0.0043 95.64777
0.0656 0.0037 94.35976
Rustlick 50/50 0.3382 0.0307 90.92253 87.97
0.2095 0.031 85.20286
0.2229 0.0272 87.79722

 

 

Visual Observations

Contaminant: Mystery Oil

Cleaner 5 Mins 10 Mins 15 Mins Rinse
1

- soil immediately turned pale white

- thin white rim at top of water

- water turned opaque white

- cloudy dilution

- rim at top getting thicker

- cloudy dilution

- thick white rim at top of water

 

 

- thin white rim

- coupon looks clean

2

 - soil immediately turned pale white

- thin white rim at top of water

- white streaks visible in dilution

- clear solution

- think white rim

 

- visible white streaks in dilution

- coupon looks clean

 

3

- soil immediately turned pale white

- thin white rim at top of water

- water turned cloudy

- cloudy white rim

- soil floating in water

- thick white rim at top of water

- very faint white streaks on coupon

- coupon looks clean

4

- soil immediately turned pale white

- white rim forming at top of water

- water turned cloudy

- cloudy white rim

- soil floating in water

 

- thick white rim at top of water

- very faint white film on coupon

- coupon looks clean

5

- soil immediately turned pale white

- white rim forming at top of water

- water turned cloudy

- cloudy white rim

- soil floating in water

 

 

- thick white rim at top of water

- very thin white rim

- coupon looks clean

6

- soil immediately turned pale white

- soil moving to top of water

- white rim at top of water

- thin white film on coupon

- faint white streaks in water

 

- very faint white film visible in water

- coupon looks clean

               

Contaminant: Rustlick 50/50

Cleaner 5 Mins 10 Mins 15 Mins Rinse
1

- cloudy white dilution

- thin blue rim at top of water

- no odor

- less cloudy

- soil coming off coupon

- layer of soil at top of water

- thick rim at top of water

- no longer cloudy

- clear with soil removed

- soil residue remaining

- blue streaks

 

2

 - immediate thin white swirls on surface

- clear liquid

- soil moving (white swirls)

- soil still moving

- soil is coming off coupon

- water is opaque

- no longer moving

- soil looks to be removed

 

- soil still on coupon

- blue residue remaining

 

3

- immediate change in soil color (bright blue to pale blue)

- blue streaks in visible

- blue rim forming at top of water - soil still visible on coupon

- small blue chunks visible

- blue streaks

- some soil remaining

4

- immediate change in soil color (bright blue to pale blue)

- very thin blue rim at top of water

- dilution getting cloudy

- blue rim getting thicker

- blue streaks

- cloudy dilution

- light blue streaks

- soil still visible on coupon

 

5

- immediate change in soil color (bright blue to pale blue)

- very thin blue rim at top of water

- lots of blue streaks visible along coupon

- blue rim getting thicker

 

- increased blue streaks

- blue streaks still visible

- soil still remaining on coupon

6

- small speckles came off coupon

- change in soil color (bright blue to pale blue)

- blue streaks

- line of soil on surfaces of water

- blue streaks

- soil clumping on coupon

- increased blue streaks

- blue rim at top of water

- water turned light blue

- tiny chunks visible floating

- light blue streaks

               

Success Rating:

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

Conclusion:

All six cleaners were effective at removing the Mystery Oil from copper coupons. Next step would be to add agitation to the heated immersion using a stir bar to evaluate if it improves removal of Rustlick 50/50 from copper coupons. 

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