Q-Fog SSP
Salt Spray
Tester
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ASTM B117
ISO 9227
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Salt spray test is an accelerated corrosion
test that produces a corrosive attack to the
coated samples in order to predict its
suitability in use as a protective finish. The
appearance of corrosion products (oxides) is
evaluated after a period of time. Test
duration depends on the corrosion resistance
of the coating; the more corrosion resistant
the coating is, the longer the period in
testing without showing signs of corrosion.
The apparatus for testing consists of a closed
testing chamber, where a salted solution
(mainly, a solution of sodium chloride) is
sprayed by means of a nozzle. This produces
a corroding environment in the chamber and
thus, parts in it are attacked under this severe
corroding atmosphere. The lab must insure
proper handling and mounting of samples
and careful measurement of exposure times.
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Taber 535
Abraser
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ASTM B733
ASTM G195
ASTM F1978
ISO 10074
MIL-A-8625
FED-STD-141
Method 6192
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Abrasion testing, or wear resistance, is a
common specification requirement. Samples
of material to be tested are mounted on the
abraser’s rotating turntable and subjected to
the wearing action of two abrasive wheels
applied at a specific pressure. A unique ’X’
pattern of abrasion, an exclusive Taber
feature, is produced by the rotary rub-wear
action of the wheels. Wear action occurs as
the wheels are turned by the rotating sample.
The axis of rotation of the wheels is
displaced from that of the turntable so that a
sliding action is generated as they rotate,
abrading the material. An area of 30 square
centimeters is subjected to wear, and a
complete circle on the material surface is
abraded at all angles of grain or weave.
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MicroMet 5104
Hardness
Tester
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ASTM B578
ASTM E384
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Various military and industrial plating
specifications require periodic testing for
microhardness - most notable are those for
electroless nickel and gold. Microhardness
refers to the measurement of indentations
made when a specific indenter is pressed
into a surface under light loads (less than
1kg/sq ft). The indenter can be either the
Vickers diamond pyramid or the Knoop
elongated diamond pyramid. The surface
being tested generally requires a smooth
finish; the smaller the load, the higher the
surface finish required. A precision
microscope is used to measure the
indentation, usually under a magnification of
around 500x and with a measurement
accuracy of +0.5 micrometers.
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