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The test method is used to evaluate the resistance of coatings to high-pressure water spraying. As a result, the pressure water spray test device simulates the effects of pressurized hot water on the coatings.
The resistance of a coated test sample to the loss of adhesion strength is tested through defined pressurized water spraying. The extent of damage to the test sample primarily depends on adhesion strength as well as factors such as the gap between the nozzle and the test piece, mass flow rate, test duration, nozzle geometry, impact area, impact angle, jet water temperature, and shear and scraping tools.
Evaluation is carried out by visually comparing images where characteristic values are associated with areas of peeling.
The pressure water spray test device consists of a high-pressure pump and a nozzle. The high-pressure pump transports heated water from the storage chamber and sprays it onto the prepared sample. Cuts or scrapers should be introduced from the coating to the substrate.
TEST METHODS
|
Testing Method
|
SWater Temperature
°C
|
Impact Angle
|
Gap between nozzle and sample mm
|
Mass flow rate kg/min
|
Spraying time s
|
|
A
|
60 ± 2
|
90° ± 2°
|
100 ± 1
|
11,3 ± 0,2
|
30 ± 1
|
|
B
|
60 ± 2
|
90° ± 2°
|
100 ± 1
|
11,3 ± 0,2
|
60 ± 1
|
|
C
|
60 ± 2
|
90° ± 2°
|
130 ± 1
|
11,3 ± 0,2
|
60 ± 1
|
To operate this device, you must have the following systems:
|
Internal Dimensions (cm) length x depth x height
|
66 x 45 x 46
|
|
External Dimensions (cm) length x depth x height
|
105 x 145 x 77
|
|
Weight (kg)
|
100-150
|
|
Sample Type
|
Panel
|
|
Operating Temperature Range (water temperature)
|
Ambient to + 80 °C
|
|
Operating Pressure Range
|
40 - 200 bar
|
|
Water flow rate
|
8-14 kg/min
|
|
Cabinet Material
|
Polypropylene
|
|
Control System
|
Manual
|
|
Electricity
|
220 V
|
|
Origin
|
Turkey
|
|
International Test Standards Compiled by Test Device
|
ISO 16925
|
To operate this device, you must have the following systems:
• Pure water (max. 20 μs/cm conductivity)
