About This Archive  | DCHAS-L 2022 Index   | DCHAS-L Yearly Index
person wearing a disposable face shield and surgical style mask

Check out Safety Emporium for your N95, N99, and face shield needs.

Previous by Date:
Subject: Re: [DCHAS-L] Electro polish "hot rinse" ventilation Q
Date: Monday, April 4, 2022 at 10:32:06 AM
Author: pzavon**At_Symbol_Here**ROCHESTER.RR.COM 		Next by Date:
Subject: Re: [DCHAS-L] Electro polish "hot rinse" ventilation Q
Date: Mon, 4 Apr 2022 08:30:54 -0700
Author: neal**At_Symbol_Here**chemical-safety.com

From: Monona Rossol <0000030664c37427-dmarc-request**At_Symbol_Here**LISTS.PRINCETON.EDU>
Subject: Re: [DCHAS-L] Electro polish "hot rinse" ventilation Q
Date: Mon, 4 Apr 2022 15:22:49 +0000
Reply-To: Monona Rossol <actsnyc**At_Symbol_Here**cs.com>
Message-ID: 1634969432.1816637.1649085769990**At_Symbol_Here**mail.yahoo.com
In-Reply-To <000e01d84830$c531b970$4f952c50$**At_Symbol_Here**rochester.rr.com>


well, what is it "polishing" off?  Is it reacting with surface corrosion or what?  And depending on the concentration, some sulfuric acid and sulfur oxides are likely to get airborne. If there is a bubbling action or agitation of any kind, even more is getting airborne.  There's a lot to be learned here before assuming nothing other than water is evaporating.

Monona


-----Original Message-----
From: pzavon**At_Symbol_Here**ROCHESTER.RR.COM
To: DCHAS-L**At_Symbol_Here**Princeton.EDU
Sent: Mon, Apr 4, 2022 10:32 am
Subject: Re: [DCHAS-L] Electro polish "hot rinse" ventilation Q

I wonder if it is primarily for humidity control.
Peter Zavon, MS, CIH
Penfield, NY

PZAVON**At_Symbol_Here**Rochester.rr.com
 
 
From: ACS Division of Chemical Health and Safety <DCHAS-L**At_Symbol_Here**Princeton.EDU> On Behalf Of Natalie Merrill
Sent: Monday, April 4, 2022 7:35 AM
To: DCHAS-L**At_Symbol_Here**Princeton.EDU
Subject: [DCHAS-L] Electro polish "hot rinse" ventilation Q
 
Hello Colleagues,
For an electro polish system which comes equipped with good ventilation at the phosphoric acid/sulfuric acid bath, there are three more water baths in succession with the final one being warmed to 115F with deionized water. Because we have an installation of an additional ventilation trunk dedicated to the fourth (warm water) bath, which the manufacturer does not require (and isn't shown in the equipment design) I wondered what that ventilation over the water bath might be needed for?  
 
Q: In the electro polish of stainless steels, would there be any expected evolution at the warm water rinse step?  The first rinse is cool water "drag out", then a water "pre-rinse", then the final warm rinse. (This system does come complete with in-room water treatment and a large neutralization system, that is not what I'm asking about).  The water supplied to the baths is filtered and deionized.  
 
Natalie Merrill
ACS PSS
 
 
--
Natalie Merrill, ACS PSS Chair
namerrill**At_Symbol_Here**gmail.com
--- For more information about the DCHAS-L e-mail list, contact the Divisional membership chair at membership**At_Symbol_Here**dchas.org Follow us on Twitter **At_Symbol_Here**acsdchas
--- For more information about the DCHAS-L e-mail list, contact the Divisional membership chair at membership**At_Symbol_Here**dchas.org Follow us on Twitter **At_Symbol_Here**acsdchas
--- For more information about the DCHAS-L e-mail list, contact the Divisional membership chair at membership**At_Symbol_Here**dchas.org Follow us on Twitter **At_Symbol_Here**acsdchas

Previous post   |  Top of Page   |   Next post


The content of this page reflects the personal opinion(s) of the author(s) only, not the American Chemical Society, ILPI, Safety Emporium, or any other party. Use of any information on this page is at the reader's own risk. Unauthorized reproduction of these materials is prohibited. Send questions/comments about the archive to secretary@dchas.org.
The maintenance and hosting of the DCHAS-L archive is provided through the generous support of Safety Emporium.