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Wire arc spray metallizing
is a form of thermal spraying where two consumable metal
wires are fed independently into the spray gun. These wires are
then charged and an arc generated between them. The heat from
this arc melts the incoming wire, which is then entrained in an
air jet, atomized, from the gun. This entrained molten feedstock
is then deposited onto a substrate to provide a wide range of
characteristics: wear, chemical and corrosion resistance,
machinability and shielding. This process is commonly used for
metallic, heavy coatings. Coating thicknesses up to .100” are
possible with BondArcâ
75B
Praxair/Tafa
Arc Spray Cobalt Alloy-106 MXC ®
Made exclusively for arc spraying, Praxair/TAFA 106 MXC is used
to produce a Rc 48 wear resistant coating that resists
particle erosion at temperatures from 1000 - 1550°F (540-840°C),
and is suitable for exhaust valves and seats. Mis-machined or
worn parts may be rebuilt with 106 MXC and re-machined using
various grinding techniques. Turbine air seals and turbine vanes
coated with 106 MXC withstand fretting in high temperature
environments. Several major manufacturers of aircraft engines
are evaluating Praxair Tafa 106 MXC as a cost-effective
alternative to plasma sprayed material that conforms to PWA
53-16 and PWA 53-18
Praxair/Tafa
Arc Spray BondArc ® Wire 75B®
Made exclusively for arc spraying, BondArc 75B, Bond
Enhancing wire is a unique 95% Nickel-5% Aluminum alloy for
use in arc spray systems under U.S. Patent No. 4,027,367 and
corresponding foreign patents. BondArc wire is self bonding to a
broad range of smooth metal surfaces including annealed or
hardened carbon steels, annealed or hardened alloy steels,
stainless steels, aluminum, nickel, cast iron, titanium and
tantalum. It is not self-bonding to copper based alloys or
tungsten. Mis-machined or worn parts may be rebuilt with BondArc
75B and re-machined with cemented carbide tool bits or various
grinding processes. Coatings to a maximum thickness .250” have
been achieved by continuous spraying. Thus, in some cases,
BondArc can be used as a one-coat system. BondArc 75B meets the
following specifications:
PWA-36937 (PWA 271-37 Rev D, PWA 53-37)
GE Manual operation number 70-49-38 as an alternate to 70-49-10
Avco M3951B
Rolls Royce OMAT #3/229
SNECMA DMR33-011
Allied Signal FP5045 and BF Goodrich Service Letter 1623
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