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Trial Number 6

Client Number 7

Project Number 1

Trial Purpose:

Evaluate four AW Chesterton products

Date Run:

07/20/1995

Experiment Procedure:

The purpose of this trial is to determine the effectiveness of the four new AW Chesterton products in removing the wax and oils for Plating Job Shop.
This trial's setup is pretty much the same as Previous trials for Plating Job Shop. For each run, the coupons were checked at 5 minute intervals and removed when they appeared clean, or fifteen minutes elapsed (whichever came first). Cleaning was performed at 150 F. Rinsing was done in a tap water rinse (150 F ) followed by a Di water rinse (100 F ). The coupons were run under air knives for 2 minutes and then placed in a convection oven set at 120 F for one hour.
The coupons cooled down for one hour and were then analyzed for cleanliness. A run of all four cleaners showed that the KPC 820N was the best cleaner. To further test out this cleaner, concentrations of 10 and 15 percent were used with the same cleaning conditions.

SUBSTRATE MATERIAL: Brass 260 coupons, Copper 110 coupons, Aluminum 6061 coupons, Steel boiler plate pieces
CONTAMINANTS: Wax, Safetap Grinding Lubricant, CI Hayes Quench Oil, Tap Magic Cutting Fluid.
CONTAMINATING PROCESS USED: Coupons dipped in wax and oils were applied with a swab.

Trial Results:

The 181 did ok. There was wax spotting on the brass and copper pieces and the steel piece had a thin waxy film on it. The aluminum looked very clean except for a couple of spots. Moderate foam

No foaming at all but the 217 did a horrible job in removing the wax.

The 803 did an exceptional job of removing the wax and oils. Moderate foaming. The one problem is that the Aluminum coupon etched pretty bad. A lower concentration may solve this.

AW Chesterton KPC 820N Excellent removal on all four substrates in just 5 minutes. A little bit of wax drag out was on the Aluminum coupon because it wasn't totally submerged.
Longer cleaning time is required because of the lower concentration. It seems that the Aluminum was attacked because the final weight was less than the original weight, and the coupon is a lot lighter in color.
Pretty much the same as the 10% except that there was a noticeable amount of wax on the copper coupon. Once again the Aluminum was attacked.

EXPERIMENTAL DATA LOG

                                                    GRAVIMENTRIC ANALYSIS

sample # and subs. and cleaner clean mass (g) mass with contamination (g) mass after cleaning (g) contaminant removed (g) Percent Removal
#24 Al -181 21.0158 21.9608 20.9978 0.963 101.90%
#6748 Br -181 34.6713 35.6164 34.6752 0.9412 99.59%
#4704 Cu - 181 35.4732 36.4391 35.4744 0.9647 99.88%
#48 Steel - 181 133.1562 134.7419 133.1666 1.5753 99.34%
#27 Al -217 20.9919 22.0748 20.9018 1.173 108.32%
#5221 Br -217 34.5169 35.6425 34.5833 1.0592 94.10%
#2632 Cu -217 35.2652 36.1966 35.5087 0.6879 73.86%
#13 Steel -217 176.5640 178.7369 176.8863 1.8506 85.17%
#28 Al -803 20.9919 22.0875 20.9018 1.1857 108.22%
#5907 Br -803 34.5836 35.7179 34.5828 1.1351 100.07%
#3427 Cu -803 35.3454 36.2393 35.3452 0.8941 100.02%
#47 Steel -803 139.0012 140.5624 139.0044 1.558 99.80%
#19 Al -820 21.0103 21.9682 21.0112 0.957 99.91%
#5159 Br -820 34.5106 35.5798 34.5108 1.069 99.98%
#4149 Cu -820 35.4171 36.3466 35.4177 0.9289 99.94%
#45 Steel -820 133.2805 134.7706 133.2816 1.489 99.93%
#22 Al -820 20.9741 21.8801 20.9462 0.9339 103.08%
#2870 Br -820 34.2839 35.1457 34.2836 0.8621 100.03%
#3824 Cu -820 35.3843 36.2614 35.3854 0.876 99.87%
#58 Steel -820 127.7488 129.0977 127.7539 1.3438 99.62%
#25 Al -820 20.9985 22.0217 20.9726 1.0491 102.53%
#5004 Br -820 34.4961 35.4297 34.4959 0.9338 100.02%
#3153 Cu-820 35.3178 36.2194 35.3248 0.8946 99.22%
#58 Steel-820 127.7488 129.0977 127.7539 1.3438 99.62%

Success Rating:

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

Conclusion:

Most successful trial to date for Plating Job Shop.  The KPC 820N did an excellent job of removing the wax.  It looks like all of the Chesterton cleaners tend to attack Aluminum with longer cleaning times.  The best option would be the 20 percent solution for 5 minutes, or 10 percent solution for five minutes with brushing.  Probably will do an aluminum attack test for the KPC 820N at different concentrations.

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