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To evaluate various aqueous products for wax removal from glass coupons using immersion cleaning.
Eight products were selected from the lab's on-line database, www.cleanersolutions.org, based on past testing results matching client supplied information. Two client supplied products were included for testing as well for comparative purposes. All of these products were diluted to 5% using DI water in 500 ml beakers. All eight products were heated to 130 F on a hot plate.
Thirty preweighed glass coupons were coated with Universal Photonics Unibond 5.0 wax by heating the wax with a Master Appliance Heat Gun and smearing the melted wax across the glass coupons. Dirty weights were recorded. Three coupons were cleaned in each product for five minutes using minimal agitation. Coupons were rinsed in a tap water bath at 120 F and dried using compressed air at room temperature. Final weights were recorded and efficiencies were calculated.
Some of the coupons were found to gain weight after immersion cleaning. This was due to the cleaning solutions becoming embedded in the wax/adhesive on the coupons, causing the wax to swell. The cleaning solutions remained in the wax after rinsing and drying resulting in the increased weight or negative cleaning efficiencies. The table lists the amount of soil added, the amount remaining and the efficiency for each coupon cleaned.
|Cleaner||Initial wt||Final wt||% Removed|
|SC Aircraft & Metal cleaner||0.4036||0.3360||16.75|
|Texolite 1734 XL||0.3587||0.3165||11.76|
|Amber clean L12||0.7237||0.8293||-14.59|
|Amber clean Q3||0.6280||0.7608||-21.15|
|Polychem 2000 P||1.0430||1.2878||-23.47|
Success Rating:Results successful using TACT (time, agitation, concentration, and temperature, as well as rinsing and drying) and/or other cleaning chemistries examined.
Many of the products were found to have some effect on the wax/adhesive even though the efficiencies were all less than 50% removal. A follow up test will be conducted using ultrasonic cleaning.