As described in a preceding blog, changing ultrasonic frequency has a demonstrated effect on the size of particles removed from a contaminated surface depending on frequency. Low frequencies produce large cavitation bubbles which implode with high energy. High energy implosions are able to dislodge relatively large particles from a surface. Higher frequencies produce smaller cavitation …
Note – The following blog is adapted from a paper recently written by Timothy Piazza, President of Blackstone-NEY ultrasonics and is re-printed here with his permission. This would probably be a good time to mention that guest blogs or suggestions for blog topics are always welcome. My email is jfuchs@ctgclean.com. FJF Blackstone~NEY Ultrasonics – Sweep …
My previous blog addressed the chemical cost of using too much (or perhaps too little) “soap” in a cleaning process based on chemical cost. Today we look at process issues. You might be saying, “What the heck? So I use too much chemical. Soap is cheap and I look at it as “insurance”.” Well, that “insurance” …
I have talked before on the blog about the subject of chemical concentration and its relationship to cleaning. A couple of recent incidents prompt me to re-address the subject of chemical concentration but from a little different angle. It’s a “no-brainer” that cleaning chemicals are expensive and, with the possible exception of heat and labor, …
I have spent considerable time on the blog disclosing and discussing a variety of cleanliness testing methods. A couple of tests that escaped earlier discussion, however, are the “white glove” test and the closely-related “swab” test. These tests are conducted by rubbing or wiping a surface using a white (usually cotton) glove or a cotton …
In some cases, previously described oil removal technologies based on the gravity separation of oil from the cleaning solution are unjustifiably cumbersome and expensive. Fortunately, smaller scale solutions are available for use in such applications. Oil Skimmers – Oil skimmers utilize a material which preferentially attracts oil (hydrophobic) to skim floating oil from a surface …
Preceding blogs have described oil removal techniques for industrial cleaning in some detail. It would be nice if this was always a simple consideration – but it is not! The case for using an oil coalescer is pretty clear cut as long as the cleaning chemistry is truly a “splitter” AND, THE OIL IS NOT WATER SOLUBLE. …
In the blogs Chemistry – Oil Splitting and Oil Emulsification – Part 1 and Chemistry – Oil Splitting and Oil Emulsification – Part 2, I discussed how oils are removed from parts using chemistry that either splits or emulsifies the oil. The next step is to collect and get rid of or recycle that removed oil. This …
“Splitting” of oil from a surface as described in a preceding blog is a part of nearly any oil removal process. Note – Even cleaning chemistry that is generally classified as an “emulsifier” has ingredients to promote the initial “splitting” of the oil from the surface being cleaned. These ingredients are often called “surface active …
As I have said before on this blog, I am not a chemist. Whatever I say about chemistry on the blog is expressed in layman’s terms and is based on practical experience and not on any deep understanding I have of the properties of chemicals. The usefulness of any information provided here applies only to …
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