of phosphate and toxic heavy metals, it is ultra-thin,
absolutely uniform, and makes production processes
significantly more economical. The talk is of a novel,
nanotechnology-based conversion coating for metals.
This innovative surface pretreatment prior to painting
is considerably more efficient, less complicated and
more cost effective than conventional iron phosphating.
For about a century, iron phosphating with subsequent
passivation has been the standard process for the
treatment of surfaces before painting in the metal
industry. This traditional method is now coming under
scrutiny, because Henkel has launched a nanoceramic
coating process - the world's first - that is far
superior to iron phosphating in terms of quality,
ecology and economics: Bonderite NT (NT for nanotechnology).
protection and paint adhesion
Bonderite NT is suitable for surface pretreatment
for all conventional powder and wet paint coatings.
It can be applied by dipping or spraying and creates
a cohesive, inorganic, high-density layer incorporating
nanoparticles. Measurements have shown that the nanoceramic
coating delivers markedly better corrosion protection
and paint adhesion than iron phosphating.
in field tests
The new process offers numerous economic benefits.
No bath heating is required. Bonderite NT coatings
can be applied at room temperature, thus saving energy.
Speed is also accelerated: The throughput time for
parts being treated is only about 20 seconds. Moreover,
Bonderite NT makes passivation unnecessary, thus eliminating
an entire process step. For the user this means cost
reductions all along the line.
Less sludge, better
The new process is also remarkable in environmental
respects. In addition to its low energy needs, it
is also distinguished by its entire lack of organic
ingredients. Neither phosphates nor toxic heavy metals
have to be disposed of, which means that far less
sludge is generated in production. Its positive environmental
profile pays economically: Outlay on wastewater treatment,
waste disposal and plant cleaning and maintenance
is significantly reduced.
The nanoceramic process, patent pending, was launched
in the USA at the end of 2003, where it has been performing
well at over 20 sites. Successful Pilot projects have
also been running in Europe since the summer of last
year. As a landmark innovation, Bonderite NT is enabling
Henkel to consolidate and build on its strong position
in metal pretreatment. Thanks to its innovative and
groundbreaking properties for metal pretreatment,
Bonderite has been honored with the Fritz Henkel Award
for Innovation. Henkel KGaA has been presenting this
award (named after company founder Fritz Henkel) since
1982 in recognition of outstanding achievements by
its employees around the world. Bonderite NT thus
joins the ranks of successful innovations, such as
Persil phosphate-free, which have made a lasting impact
on their respective target markets.
Source : Source: Henkel Loctite