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Re: P2 in the welding business

Charley asks:
I have received an information request for Pollution 
Prevention in the process of welding.  This request was from a small 
business owner.  I have no information in our Resource Center on this 
subject Thanks,

Ms. Charley Rains
Prevention Outreach Specialist
Idaho Division of Environmental Quality
1410 N. Hilton
Boise, ID 83706 
(208) 373-0112
fax (208) 373-0169
Hi Charley,
First, Happy New Year. The following are six abstracts of articles we 
have. I can send you hard copies of any you like. If the welding in 
question includes stainless steel, and they are passivating the weld 
in the traditional manner using nitric acid, they can look into doing 
the same thing with glass bead blasting. I have nothing to send you 
on this. I recall contacting sandblasting/bead blasting dealers and 
obtaining valuable information in this manner:


1. Rec# 190. Balmer, Kenneth B., and Martin Larter. "Chelants Prove 
Practical for Cleaning and Passivation of Stainless Steel Parts." 
Precision Cleaning Magazine , no. 27-29 (November 1994
Traditionally, stainless steel has been cleaned and passivated after 
fabrication of welding by being washed with nitric acid. Chelant 
passivation uses biodegradable, less corrosive, and easier to h
dle agents like citric acid.
FMP 1362.
3400/3500/Metal parts/Stainless steel/Cleaning/Passivation/ 

2. Rec# 10. Cost Effective Methodology For Reducing and Calculating 
Chrome Emissions, Rhonda Cardinal. 41 pages. Huntington Beach, 
California: McDonnell Douglas Aerospace, 26 October 199
This paper discusses ways of reducing chrome in electroplating, 
stainless steel welding, and painting operations.
FMP 0652.
3400/chrome emissions.

3. Rec# 40. Carlson, N. M., J. A. Johnson, H. B. Smartt et al. 
Sensing The Gas Metal Arc Welding Process, 38-49. 11 pp. New York, 
NY: Technology Utilization Foundation, 199
Control of gas metal arc welding (GMAW) requires real-time sensing of 
the process.  Three sensing techniques for GMAW are being developed 
at the Idaho Naitonal Engineering Laboratory (INEL).  These
re (1) noncontracting ultrasonic sensing using a laser/EMAT 
(electromagnetic acoustic transducer) to detect defects in the 
solidified weld on a pass-by-pass basis, (2) integrated optical 
g a CCD camera and a laser stripe to obtain cooling rate and weld 
bead geometry information, and (3) monitoring flucuations in 
digitized welding voltage data to detect  the mode of metal droplet 

sfer and assure that the desired mass input is achieved.
FMP 2225.

4. Rec# 760. Holzhauer, Ron. "Tips for Solving Maintenance Problems." 
Plant Engineering File 5550 (12 August 1993): 70-73.
Some common everyday fix-its for industry.  Electrical, welding, 
batteries, grease, etc.
MISC 0031.

5. Rec# 440. Laser, TVA. Waste Reduction Guide. : TVA. AT07.
This report compiles technical bulletins on the applications of laser 
beams and the technologies that lasers replace.
PPP 0613.
Pollution prevention/Waste reduction/Lasers/Cutting/Welding/Heat 
treatment/Applied technology.

6. Rec# 470. Plasma Arc, ________. Waste Reduction Guide. : TVA. 
This report compiles several technical bulletins on plasma arc 
technology.  It replaces other technologies for cutting, welding, 
melting, and heat treating metals, ceramics, and glasse
PPP 0616.
Pollution prevention/Waste reduction/Plasma arcs/Ionized gas/ Thermal 
plasmas/Metals/Ceramics/Glasses/Cutting/Welding/Melting/ Applied 

Rudy Moehrbach
Waste Reduction Resource Center
P.O.Box 29569
Raleigh, NC 27626-9569,Tel 800-476-8686,FX 919-715-1612
Homepage http://www.owr.ehnr.state.nc.us/wrrc1.htm