Aluminum Foil Test for Ultrasonic Performance – Potential Problems

Task At Hand – In a previous blog I declared that I am not a fan of the aluminum foil test for evaluating ultrasonic performance.  I question its validity and relevance on a number of fronts.  If my purpose here is to question my own skepticism, then I guess I should probably define the factors …

Aluminum Foil Test – Foil Perforation Mechanism

Until recently, I was only able to theorize about the mechanism involved in the perforation of aluminum foil by ultrasonic cavitation.  I no longer have to theorize! My theory had always been that perforation of aluminum foil was due to the repeated flexing of aluminum foil as cavitation implosions occurring on opposite sides of the foil …

Aluminum Foil Test

If you’ve heard of ultrasonic cleaning you’ve probably heard of the aluminum foil test.  The practice of putting a piece of aluminum foil into an ultrasonically activated tank of water probably began as a novelty demonstration.  The holes produced in the aluminum foil by the collapse of cavitation bubbles at least showed that something interesting …

How Much Chemistry – Liquid

Using the right amount of chemistry is important to successful industrial cleaning.  Since there is no standard convention for expressing the amount of chemistry to use, it sometimes takes a little effort to sort things out.  Chemistry is supplied in either liquid or powder form with several different conventions for each.  Let’s look at liquids …

Wash, Rinse and Dry

Today’s industrial parts cleaning processes commonly employ at least three distinct steps. The basic steps are Washing, Rinsing, and Drying. Each step is custom tailored to the overall requirement with the range of options for each much broader than one not intimately involved with the technology might imagine. In some processes, in fact, it is …

The Lowdown on Dirt

One of the first steps in the development of any cleaning process is to define and understand the contaminant or “dirt” that needs to be removed. Sounds simple, right? Not so fast! Dirt comes in all varieties and styles. Different kinds of dirt require different cleaning processes. Some dirt is liquid. Oils, coolants, paint, adhesives, …

The Cost of (Not) Cleaning

Why do we clean things?  “Cleanliness is next to Godliness” immediately comes to mind but doesn’t seem quite appropriate here.  There are tons of reasons to clean things but in the final analysis it comes down to aesthetics and function.  Cleaning makes things look better or function correctly or more efficiently. The typical automobile can …

How Clean is “Clean?”

This over-worn catchphrase has been the title or has at least appeared in countless articles on the subject of cleaning.  Is it in need of a well-earned retirement?  Probably, but in its defense, let me say that “clean” is a pretty nebulous thing. A few minutes ago, I pulled up one of the leading dictionary …

Cleaning Is More Than Removing Dirt

In simple terms, industrial parts cleaning (sometimes called washing) is just removing dirt from surfaces. If only it WAS that easy! Dirt removal is only one of 10’s if not 100’s of interdependent steps in a successful cleaning process. The scope of parts cleaning extends from processing of the raw materials, through the manufacturing process …