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 …

Hot Air Drying – Tips and Pitfalls

Drying is the last and often a critical part of a cleaning process.  In many cases it is also the most time and energy consuming.  It is often the most difficult part of the process to specify and control.  Although there are several drying technologies available, blowing with hot air is simple and by far …

Stainless Steel Compatibility

With its well-deserved credentials for chemical resistance and durability, stainless steel and particularly 316 grade stainless steel is a “go to” for the fabrication of ultrasonic cleaning tanks.  Although it performs well in most applications, there are still those where stainless steel has its limitations.  Stainless steel achieves its “stainless” characteristic by developing a very …

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 …

Get a Move On

There’s an old adage – “One Hand Washes the Other.”  Although this adage is seldom applied to cleaning technology, it certainly could be.  In fact, most successful cleaning consists of a combination of chemistry (soap, solvent or whatever) and some kind of added mechanical force to enhance or enable the cleaning process.  If one could …

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 …