49 NACE INTERNATIONAL: VOL. 56, NO. 8 MATERIALS PERFORMANCE AUGUST 2017
Continued f rom page 47
COATINGS & LININGS ESSENTIALS
new ISO concrete coating committee.
Poncio is a NACE instructor and has also
led and served on numerous NACE
committees.
Membership on the NACE U.S. TAG to
ISO TC 35 is open to all U.S. national inter-
ested parties who indicate that they are di-
rectly and materially affected by the activity
of the U.S. TAG.
More information on the activities of the
TAG is available on the NACE web site under
ISO TC 35 TAG - U.S. TAG to ISO_TC 35
Paints and Varnishes, or by contacting TAG
Administrator Ed Barrett, the NACE strategic
standards developer, at +1 281-228-6295 or
ed.barrett@nace.org.
High-Speed Laser Deposition
Expands Coating Options
Photo by Fraunhofer ILT, Aachen, Germany/
Volker Lannert.
Researchers with Fraunhofer Institute for
Laser Technology ILT (Aachen, Germany)
and RWTH Aachen University (Aachen,
Germany) have developed the extreme
high-speed laser material deposition pro-
cess (EHLA) that offers an economical al-
ternative for protecting components
against corrosion and wear. e process can
quickly and efficiently apply thin metallic
layers, 25- to 250- μ m thick, over large areas.
EHLA is a laser material deposition
technique that applies high-quality, firmly
bonded coatings to various materials. is
process melts the powder particles while
they are above the melt pool so that drops of
liquid material instead of solid powder par-
ticles fall into the weld pool, which results in
a nonporous, more homogenous coating
layer using less base material. According to
the researchers, the process utilizes ~90% of
the coating material, which conserves re-
sources and makes the process very eco-
nomical. e deposition's thermal effect
zone on the material is in the μ m range, so it
is possible to coat heat-sensitive compo-
nents without incurring brittle phases.
e EHLA process is able to coat a com-
ponent at feed rates between 50 and 500
m/min, which is 100 to 250 times faster
than speeds with conventional laser mate-
rial deposition. Various materials can be
used for EHLA coatings, such as iron,
nickel, and cobalt-based alloys. In addition,
completely new material combinations are
possible, such as coatings on aluminum-
base alloys or grey cast iron.
Source: www.ilt.fraunhofer.de/en.html.