Trial Purpose:
The purpose of this experiment was to evaluate the effects of cleaners using unheated, heated, and heated immersion with agitation to remove the white buffing compound from aluminum substrates.
Date Run:
07/16/2020Experiment Procedure:
The following cleaners were tested under specified conditions: Metalnox 6386 (100% concentration, 100°F), Liquinox (1% concentration, 170°F with a stir bar), Propylene carbonate (100% concentration, room temperature), SC Supersolve (5% concentration, room temperature), Dimethyl glutarate (100% concentration, 130°F). Three aluminum coupons were obtained and weighed for each of the five cleaners tested. Coupons were then soiled with the white buffing compound using a swab and a soiled weight was recorded. Coupons were then immersed into their respective cleaners under the listed conditions for five minutes. When five minutes passed, coupons were air dried, and a clean weight was obtained. Effectiveness of the cleaners was then determined.
Trial Results:
| Cleaner | Initial wt. of cont. | Final wt. of cont. | % Cont. Removed | %AVG |
| Metalnox 6386 | 0.0064 | 0.0034 | 46.88 | 32.11 |
| 0.0138 | 0.011 | 20.29 | ||
| 0.0199 | 0.0141 | 29.15 | ||
| Liquinox | 0.0052 | 0.0014 | 73.08 | 99.99 |
| 0.0022 | -0.0004 | 118.18 | ||
| 0.0023 | -0.0002 | 108.7 | ||
| Propylene Carbonate | 0.0206 | 0.0189 | 8.25 | 16.4 |
| 0.0237 | 0.0217 | 8.44 | ||
| 0.0163 | 0.011 | 32.51 | ||
| SC Supersolve | 0.0047 | 0.0032 | 31.91 | 15.35 |
| 0.0052 | 0.0047 | 9.61 | ||
| 0.0044 | 0.0042 | 4.54 | ||
| Dimethyl glutarate | 0.0031 | 0.0005 | 83.87 | 92.17 |
| 0.0058 | 0.0002 | 96.55 | ||
| 0.0051 | 0.0002 | 96.08 |
Success Rating:
Results successful using TACT (time, agitation, concentration, and temperature, as well as rinsing and drying) and/or other cleaning chemistries examined.Conclusion:
Liquinox was the most effective cleaner removing an average of 99.99% of white buffing compound from aluminum substrates using a 1% concentration solution at 170°F with agitation from a stir bar. Note that some coupons exceeded 100% removal using Liquinox, this means excess soil present from previous experiments was also removed. Dimethyl glutarate was the second most effective removing an average of 92.17% using a 100% concentration solution at 130°F.
