Cleaning Electronic Parts for High-Voltage Applications
Q. How can I clean electronic parts and assemblies for extremely high-resistance and/or high-voltage applications?
A. I recommend you clean with the product Detergent 8. Detergent 8 is an ion-free cleaner that cannot leave a conductive detergent residue. You use Detergent 8 at a 2-5% dilution (2.5 oz/gal to 6.5 oz/gal) depending on how you are using it. For soaking use 5%, for ultrasonic tanks use 3% and for pressure spray washing use 2%. Rinse thoroughly with deionized water after cleaning.
Cleaning Eudragit NE30D and Eudragit E100
Q. We are a oral dosage pharmaceutical and are having some cleaning issues with our coating pans after using 2 different type of Eudragit. Eudragit NE30D is probably the most difficult and our most urgent one to clean, the other is Eudragit E100 (Amino methacrylate copolymer). Do you have any suggestions or recommendations? Also I would be very interested in the validated residual methods that you have on these products.
A. The film residues from EUDRAGIT® NE 30 D polymers are neither soluble in acid nor in alkali. They can, however . . .
Clean in Place Instructions
If it is too costly and time-consuming to dissasemble large manufacturing filtration systems or tanks, mixers and blenders for cleaning, consider clean in place.
Medical Device Cleaning – 303 SS Pins
Q. The 303 staiinless steel pins we are attempting to clean appears clean but the silicone adhesive Dow Corning 3-8264 does not consistently adhere to the pins. Is the Alcojet cleaner the correct cleaner to remove the maching oils from the pins and leave the surface residue free for bonding. I am looking for the proper cleaner to use to prepare some small parts for bonding. We are attempting to use silicone to seal 303 stainless steel pins into a black polycarbonate housing.
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Cleaning Aluminum without Corrosion
Q. How is galvanic corrosion prevented when cleaning aluminum?
A. Aluminum is an active metal that is somewhat high on the “anodic index” of the galvanic series. If aluminum is cleaned with other metals present, you can create a battery and get galvanic corrosion. Aluminum should not be cleaned in the presence of metals that are significantly higher or lower on the anodic series; higher on the anodic scale such as zinc, magnesium or beryllium metals and lower on the anodic scale such as tin, brass, bronze, copper, silver, nickel and rhodium.
