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 …

Ultrasonics – Monitoring Ultrasonic Performance

In the blog “Reader Questions – Monitoring Ultrasonic Transducers,” I suggested a couple of ways one might test individual ultrasonic transducers to assure they have not become ineffective due to de-bonding from the cleaning tank.  In an extension of the spirit of that blog, quality control measures for ultrasonic cleaning performance, I decided to check out a paper I …

Reader Questions – Baskets for Ultrasonic Cleaning

Before we get to today’s topic, we have an announcement!  Many of you may have recently subscribed for email updates of the blog either on your own or as a result of emails sent out by the Cleaning Technologies Group.  The names of those of you who did were entered into a drawing for an ipad (wish I could …

Cleaning – Soluble Contaminants – “Solvents”

In the blog entitled The Lowdown on Dirt, the three basic classes of contaminants were described.  They are – soluble, particulate and a mixture of soluble and particulate.  There are, of course many hybrids and permutations but for purposes of discussing the ultrasonic effect on cleaning we’ll limit to these three for now.  Later on we can …