Ultrasonics – Ultrasonic Generators – What Is “Pulse”

Certain benefits can be derived in ultrasonic cleaning and processing by “pulsing” the ultrasonic generator.  In fact, different pulse rates and duty cycles produce different benefits.  This blog explores how “pulse” works and how its variants benefit ultrasonic cleaning in different ways. An earlier blog described the basic function of the ultrasonic generator. Ultrasonics – Ultrasonic Generator …

Cleaning and Rinsing – Spray Nozzles for Use in Air

Previous blogs have suggested the use of liquid sprays in air as either a primary mechanism or as an enhancement to both cleaning and rinsing operations.  Today’s blog will discuss, briefly, what is important in choosing a spray nozzle or nozzles for a particular application.  In order for spray to be effective, of course, the …

Rinsing – Better Rinsing Using Less Water

It is no secret that good cleaning followed by poor rinsing can be worse than not rinsing (or cleaning) at all.  A single-use rinse using a fresh water spray or a high flow rate or single use immersion rinse are often thought to provide the ultimate rinse.  These options, however, are often extremely expensive because they consume …

Cleaning – Solvents – So What’s Different Now?

Previous blogs discussed the demise of solvents after the Montreal Protocol.  Today, in the US at least, solvents are coming back prompting the reader to ask, “What Has Changed.”  First of all, there was never any real argument that solvents did, and still do, a good job of cleaning in many, many applications!  Are there aqueous and other alternatives …

Cleaning Process – Preventing Oxidation During Cleaning and Rinsing

Rust is a potential problem whenever ferrous parts are being cleaned.  There are several options available to prevent or eliminate rusting both during and after the parts cleaning process.  Steel will rust if it is exposed to oxygen and moisture as discussed in the blog Some Things You Should Know About Rust. Although iron oxide (rust) gets …

Cleaning – Solvents – The Phoenix Stirs!

In the period immediately following the signing of the Montreal Protocol, virtually every manufacturing facility using solvents for cleaning was faced a critical decision.  The three basic options were – Discontinue unnecessary cleaning operations altogether. Upgrade or replace existing solvent-based cleaning systems to reduce solvent emissions. Switch to cleaning using water-based chemistry. Surprisingly, the first option, eliminating …

Cleaning Process – Rinsing – Preventing Carry-Over

A dedicated reader has requested that the blog address rinsing in more detail.  Rinsing ranks high on the list of process steps that are often not given their due attention in the specification of an overall cleaning process.  Many specifications just say “rinse” and nothing more.  In fact, rinsing is a secondary cleaning step intended to remove residuals left …

Cleaning – Chemistry – What Happened to Solvents?

Most cleaning today is based on aqueous (water based) technology.  Wash, rinse and dry cleaning has become the norm.  But, for those of you who are new to the cleaning industry and don’t know, Chlorinated and Fluorinated solvents were the cleaning “benchmark” for many years.  Virtually every manufacturing facility cleaned something using a vapor degreaser with …