- Standards, Guidelines
Purity requirement: VDI 2083 sheet 14 (AMC) in preparation
Beer tasted after tin cans, white powder becomes by the packing foil
pink, galvanized steel racks or art articles and kirchenfenster
corrodes due to of aggressive air. What happens there? Completely
simply said: It takes place a chemical attack. Technically expressed:
The characteristics of the materials change by effect of
chemical/molecular contamination. That can be desired, as e.g.
Geschmacksveraenderer or additives are added, in order to obtain or
produce around alloys with mix beverages the "correct" taste, which
technical characteristics e.g. the conduction of chips by "doping" are
changed in such a way that the chip is increased either uselessly will
or that its achievement.Since the destruction by dust or dirt effect, caused by living or dead
particles, is as far as possible investigated and by the conventional
clean-room technology well into the grasp to be gotten is, now the
"still smaller" Kontaminanten interests us, beginning within the lower
range of the nano-particles. So that also within this
chemical/molecular range everything happens with "right things", the
international standard DIN ISO 14644-8 was provided, itself with the
classifications of Kontaminanten, their allocation and the different
measuring and analysis systems, which employ AMC (in the pure room air
molecular Kontaminanten present).Based on it at present the guideline VDI develops 2083 sheet 14, which
itself with the industry-specific problem fields of electronics over
pharmacy up to food production busily and it makes possible for the
user, already in the apron to employ the necessary considerations
toward the chemical Kontaminanten the contamination to measure and
separate and/or, if possible, to avoid. The draft of this guideline
will appear prospective in the summer 2007. Andreas's Mach Mueller,
MCRT (chairman VDI 2083 sheet 14)
VDI Verein Deutscher Ingenieure
Postfach 10 11 39
40468 Düsseldorf
Germany
Phone: +49 211 6214251
Fax: +49 211 6214177
email: wollstein@vdi.de
Internet: http://www.vdi.de/tga