Trial #0
Two chemistries were tested.
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Two stainless steel tank valves and four sections of tank lids were cleaned for Vessel Cleaning Company. Two different chemistries were tested. One was a twenty percent solution of Delta Omega Technologies DOT 111/113, the other chemistry was a mixed solution containing Sodium Hydroxide, Rochester Midland Split and Chemex 110. Each of these solutions were used in the Crest 40kHz ultrasonic unit. Cleaning time varied from 5 minutes to 30 minutes.
SUBSTRATE MATERIAL: Aluminum Drum Lids and Stainless-Steel tank valves.
CONTAMINANTS: Carbon Black
CONTAMINATING PROCESS USED: As received
The DOT 111/113 appeared to work better than Vessel Cleaning Company’s solution on the stainless-steel valves (heavy deposits still remained). Vessel Cleaning Company's solution was much more effective than the DOT-111/113 on the more lightly soiled tank lids. No etching was noticed, and all light contaminant was removed (some heavy deposits still remained).
The DOT-111/113 appeared to have some trouble in removing even the light deposits from the Aluminum.
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