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Re: P2 in the welding business
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
Ms. Charley Rains
Prevention Outreach Specialist
Idaho Division of Environmental Quality
1410 N. Hilton
Boise, ID 83706
fax (208) 373-0169
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.
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.
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.
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.
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.
Pollution prevention/Waste reduction/Lasers/Cutting/Welding/Heat
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
Pollution prevention/Waste reduction/Plasma arcs/Ionized gas/ Thermal
Waste Reduction Resource Center
Raleigh, NC 27626-9569,Tel 800-476-8686,FX 919-715-1612