To evaluate the effectiveness of cleaners removal of lubricating oils and dirt from jeweled orifices.
Date Run:
11/20/2017
Experiment Procedure:
Brass and nickel jeweled orifices provided by Bird Precision were organized in sets of three for each product. Jeweled orifices were found to be the hardest substrate to clean based on expert judgement. Observations were taken using a microscope, and photographs were taken through the eyehole of the microscope. Visual observations were taken to note the initial, dirty, and clean appearance of the parts. Five drops of a lubricating oil provided by Bird Precision were applied to the orifices along with any contamination from dust, fibers, and skin oils. Parts were placed in a basket and cleaned for one minute using unheated immersion. Slight agitation was applied by shaking the basket in the solution before being removed and placed under a heated dryer for five minutes.
Trial Results:
Visual Observations
Sky Kleen 1000
Initial
Brass: One part has small crack at the bottom of the jewel opening.
Nickel: No visible damage or dirt on the orifice or jewel.
Dirty
Brass: Oil obstructs jewel.
Nickel: Oil is not easily very visible on parts.
Clean
Brass: Parts slightly duller; some debris inside orifice; some small amount of residue on outside.
Nickel: No debris on part; not easy to rate cleanliness.
Wipe Off 5
Initial
Brass: One part with a crack across the very top of the jewel.
Nickel: No visible damage or dirt on the orifice or jewel.
Dirty
Brass: Oil obstructs jewel.
Nickel: Oil obstructs jewel.
Clean
Brass: Parts discolored; no longer appear to be brass; some debris around orifice.
Nickel: Part appears to have lots of residue; oil burnt on.
Micro 90
Initial
Brass: Slight scratch on the outer surface of one part.
Nickel: No visible damage or dirt on the orifice or jewel.
Dirty
Brass: Oil visible on the inside of the jewel.
Nickel: Oil visible on the inside of the jewel.
Clean
Brass: Discolored parts; lots of debris and blockage of orifice.
Nickel: Parts appear damaged by heat; slightly burned; residue visible.
BioCircle Aero
Initial
Brass: No visible damage or dirt on the orifice or jewel.
Nickel: No visible damage or dirt on the orifice or jewel.
Dirty
Brass: Oil visible on the inside of the jewel.
Nickel: Oil visible on the inside of the jewel.
Clean
Brass: Parts appear less bright; some residue on and around jewels and parts.
Nickel: Appear clean outside and inside.
SC Aircraft & Metal Cleaner
Initial
Brass: No visible damage or dirt on the orifice or jewel.
Nickel: No visible damage or dirt on the orifice or jewel.
Dirty
Brass: Oil visible on the inside of the jewel.
Nickel: Oil visible on the inside of the jewel.
Clean
Brass: Some residue on inside of jewel; some debris; burned on oil in crevices.
Nickel: Residue on inside and outside of part.
Success Rating:
Results successful using TACT (time, agitation, concentration, and temperature, as well as rinsing and drying) and/or other cleaning chemistries examined.
Conclusion:
Sky Kleen 1000 and Bio-circle Aero were effective at removing lubricating oil from brass and nickel jeweled orifices. Micro 90 and Wipe Off 5 damaged the parts and will no longer be used. Next step is to repeat this procedure using Gemtek aqueous cleaners.
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