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Glossar

A - B - D - E - H - I - K - L - M - P - R - S - T - W

A
Abrasive
(of a substance or material) capable of polishing or cleaning a hard surface by rubbing or grinding (e.g. with sandpaper)
Acid anhydrides
the compound obtained by removing the elements of water from a particular acid
Amines
an organic compound derived from ammonia by replacement of one or more hydrogen atoms by organic radicals
Apply
bring or put into operation or use
B
Biofilm
a thin but robust layer of mucilage adhering to a solid surface and containing a community of bacteria and other microorganisms
Blow holes
holes in hardened duroplastic materials
C
Cathodic protection
corrosion protection by using the opposite current
Corrosion
damage caused to metal, stone, or other materials due to the environment
D
Deformation
the action or process of deforming or distorting
Duroplastic materials
denoting substances (especially synthetic resins) which set permanently when heated (see also under thermosetting)
"DVGW" worksheet W 270
reproduction of microorganisms on materials used in the drinking water industry - examination and evaluation
"DVGW" worksheet W 543
lexible, pressure-resistant hoses for potable water hose installations, requirements and evaluation
E
Elastomers
natural or synthetic polymers having elastic properties, e.g. rubber
EN 971-1
requirements for varnishes and paints according to the DIN EN 971-1 guidelines from September 1996 provided by the German association for varnishes and paints (VdL): "Varnishes and coating materials - technical terms and definitions for coating materials - part 1: general terms"
Epoxy resin
special duroplastic material
H
Hardener
hardeners are used to make duroplastic materials out of resins
I
Inliner
material used for the coating of the insides of pipes and containers
K
Kinetic examination
the study of chemical reaction relating or resulting from motion
KTW
guidelines for synthetic materials in contact with potable water
L
Laboratory disperser
specific stirrer
Low-emission
low production and discharge of substances, especially gas or radiation
M
Macromolecule
a molecule containing a very large number of atoms, such as a protein, nucleic acid, or synthetic polymer
Migration
movement of chemicals into the water
P
Pickling
preparation of solid bodies by using chemicals in order to change the surface
Photometer
instrument to measure the intensity of chemicals in a chemical solution
Polyaddition
specific way to form duroplastic materials without the produce of by-products
Polymere
a substance which has a molecular structure built up chiefly or completely from a large number of similar units bonded together , e.g. many synthetic organic materials used as plastics and resins
Product analytics
he determination of the composition and properties of in-house products (e.g. hoses)
R
Rheologie
the branch of physics that deals with the deformation and flow of matter, especially the non-Newtonian flow of liquids and the plastic flow of solids
Rheometer
an instrument for measuring the rheological properties of a substance
S
Sandblasting
roughening or cleaning of a surface with a jet of sand driven by compressed air or steam in order to prevent from rust, stains, paints or other contamination
Setting
to harden something
Shore hardness
after Albert Shore, a measure of the hardness of elastomers and plastics. In practice measures are divided into Shore A and Shore D
T
Thermo-mechanical tests
tests of the mechanical quality of materials depending on strength, temperature and time
Thermoplastics
denoting substances (especially synthetic resins) that become plastic on heating and harden on cooling, and are able to repeat these processes
Thermosetting
denoting substances (especially synthetic resins) which set permanently when heated (see also under duroplastic materials)
TOC
total organic carbon is the amount of carbon bound in an organic compound and is often used as a non-specific indicator of water quality
W
Water jetting
high-pressure cleaners using water pressure up to 2500 bar (see also under sandblasting)