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June 2009

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Subject:
From:
R Sedlak <[log in to unmask]>
Reply To:
TechNet E-Mail Forum <[log in to unmask]>, R Sedlak <[log in to unmask]>
Date:
Mon, 29 Jun 2009 12:24:04 -0700
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John:  Ignoring what is written in any specifications, and what is in the customers mind, the bottom line is this:
You will get cleaner parts in an aqueous, NON-ULTRA SOUND, cleaner than you will in alcohol in ultra-sound.   And, it will be much less costly, even if you avoid a "flaming incident", and one helluva lot faster.

Is your customer able to approve, or reject parts which have been cleaned?   Can you clean some parts "your way", and submit for approval?

What are parts made of, and do you have tests to prove/disprove cleanliness?
We have developed some tests for certain metals which prove/disprove cleanliness.   The tests are qualitative, but VERY sensitive.

Rudy Sedlak
RD Chemical Company

--- On Mon, 6/29/09, John Anselmo <[log in to unmask]> wrote:

From: John Anselmo <[log in to unmask]>
Subject: Re: [TN] IPA o r Methanol in Ultrasonic Cleaner
To: [log in to unmask]
Date: Monday, June 29, 2009, 10:16 AM

Hi Bev,

To answer your questions:
Approximately half a dozen of each (screws/washers/ etc.
The qty is for each assembly and they only need to be cleaned before final assembly, so it will be an ongoing process.
We are trying to clean any contaminants (oils) on the machined parts.

I haven't researched what finish will be on the screws yet.

John

-----Original Message-----
From: Bev Christian [mailto:[log in to unmask]]
Sent: Monday, June 29, 2009 9:34 AM
To: TechNet E-Mail Forum; John Anselmo
Subject: RE: [TN] IPA o r Methanol in Ultrasonic Cleaner


John,
Well part of this (safety considerations) will vary from jurisdiction to
jurisdiction.

Second,
How many screws and how often? Is this once off or will it be repeating?

Third
What is it you are tying to clean off?

Fourth
Are the screws painted, chromated, etc.?

Bev
RIM



-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of John Anselmo
Sent: Monday, June 29, 2009 11:27 AM
To: [log in to unmask]
Subject: [TN] IPA o r Methanol in Ultrasonic Cleaner

Technet,

We are being asked by one of our customers to clean some parts (screws,
washers, standoffs, feedthrus) in an ultrasonic cleaner with either
Methanol or IPA (spectroscopic grade).
The time in the ultrasonics could be up to 1 hour.
Does anyone else have experience and recommendations for doing this?
My main concern is safety.  What type of room or enclosure do we need
for this?

Thanks,
John Anselmo

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