David S. Peterson
Vendor's Degreasing Liquid?
Question: We have a vendor that uses a proprietary aqueous mixture of 5-10% phosphoric acid and 1-5% alcohol (2-butoxyethanol, or butylcellosolve) to degrease aluminum parts prior to cleaning/etching/deoxidizing the aluminum for chromating.
Read MoreAqueous Cleaning Market
Question: I am trying to find out the size of the aqueous cleaning market for a presentation.
Read MorePretreat for Magnesium AZ91-d
Question: I have some questions around proper pre-treatment of Magnesium AZ-91D.
Read MoreColor Variance in Ceramic Media
Question: Why does the color vary so much in the ceramic media I purchase, even though I specify the same composition every time?
Read MoreReplacing Media
Question: We have a long, continuous vibratory machine, about 30 inches in diameter by 16-ft long.
Read MorePickling Stainless Steel Components Revisted
Question: I have had similar problems most notably on 303 and 416 free machining stainless.
Read MorePlaforization
Question: I have read some literature on a process for cleaning parts for powder coat called plaforization.
Read MoreAnaerobic Bacteria
Question: We are continually having a reoccurrence of anaerobic bacteria in our system.
Read MoreAccelerating Ultrasonic Cleaning
Question: I am working on a cleaning application for die casting parts (valve bodies of automatic transmissions, many cavities, very intricate form). The problem: the parts are covered with a sticky layer of graphite, because the casting company uses the graphite to facilitate the release of the parts from the molds after the casting process.
Read MoreStainless Steel Passivation
Question: In one of your previous replies, I was surprised to read that you are still promoting the use of hazardous nitric acid for passivation of stainless steels, especially for brush-on applications.
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