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Trial Number 2

Trial Purpose:

To retest the five products from previous trial using an increased drying time. Attempt to eliminate rusting.

Date Run:

04/29/1999

Experiment Procedure:

Prior to cleaning the steel tubes were analyzed to determine the level of contamination. Each part was wiped with a finger and observations were recorded.
Each cleaner was made into 10% solutions using DI water in 1400 mL beakers and heated to 130 F on a hot plate. One steel tube was cleaned in each beaker for five minutes using stir-bar-agitation. Parts were rinsed for 30 seconds in tap water at 120 F and dried using a Master Appliance Corp, Hot-air gun model HG-301A at 500 F for five minutes. During drying, it was observed that the dirtier looking parts produced steam when heated. Each part was observed for any signs of steaming. After drying, wiping observations were made to determine how clean the parts were.

SUBSTRATE MATERIAL: Steel parts - hollow steel tube
CONTAMINANTS: Oil and Dirt

Trial Results:

Two of the cleaners appeared to remove most of the contaminants from the steel tube.  One produced no steam while the other produced a little steam.  The other three yielded a lot of steam while being dried.  The wiping observations yielded corresponding results.  The parts that had the most steam left a substantial amount of dirt when wiped.  Table 1 lists the observations made for both observations made.

CLEANER SMOKE OBSERVATION WIPE OBSERVATION RANKING
Calgon Geo-Guard 2215 Lots of steam Substantial dirt 4
WR Grace Daraclean 282 GF Some steam Some dirt 3
US Polychem Polypray Jet 790 P No steam No to little dirt 1
SWR Corp SWR One Lots of steam Substantial dirt 5
Gemtek SC Aircraft & Metal Cleaner Little to no steam Little dirt 2

Success Rating:

A follow up test, usually based on company input.

Conclusion:

US Polychem Polyspray Jet 790 P and Gemtek SC Aircraft & Metal Cleaner were the best two cleaners.  After 18 hours of sitting, there was no signs of rusting on any of the parts cleaned.  The US Polychem was one of the cleaners that performed well during the first experiment with the long brass cylinders.

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