DEFELSKO - POSITECTOR SST
Soluble Salt Tester for measuring the concentration of soluble salts on metal surfaces
DeFelsko - PosiTector SST. Measures the concentration of soluble salts (salt contamination) on metal surfaces in accordance with ISO 8502-6, 8502-9.
Displays test duration, sample temperature, conductivity (µS/cm) and surface density (mg/m2 or µg/cm2)
Easy 1-2-3 gage interface guides users through the Bresle test method
Automatic storage of a background (blank) measurement — handy when performing multiple tests
Why is salt contamination measurement important?
The presence of soluble salts has been shown to have a significant negative effect on coating performance and leads to premature coating failure. Salts remaining beneath a protective coating create an osmotic force that draws water from the atmosphere through the paint layer. The pressure created by this water underneath the coating overcomes the adhesive bond between the coating and substrate, resulting in corrosion, osmotic blistering and eventual coating failure. It is therefore critical to ensure that a substrate is free from soluble salt contamination before painting.
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