Pinhole & Holiday Detection
Premature corrosion of a substrate is usually due to a coating failure. A major cause is the presence of flaws in the finished coating, collectively referred to as porosity. One of the most obvious porosity issues would be pinholes - where the substrate is open to the elements through the pinhole. Pinholes are caused by air entrapment, which is then released from the surface, or by the entrapment of particulates (dust, sand etc.) which do not stay in place. Pinhole detection is therefore essential to monitor the integrity of the protective coating from its initial application, throughout its service life.
Holiday test is used to detect holes, known as holidays or discontinuities, in a coating. Holiday testing allows the detection of even smallest coating flaws invisible to the naked eye. There are various techniques and equipment available for holiday detection.
Elcometer 280 Pulsed DC Holiday Detector Inspection Kit
- The Elcometer 280 is a holiday detector which has been designed to make pulsed DC high voltage holiday detection safer, easier and more reliable than ever before.
- Using state of the art electronics, the Elcometer 280 allows users to inspect coatings - without connecting the earth return lead to the component substrate - ideal for inspecting large surfaces and pipelines.
- The Elcometer 280 uses the high voltage pulsed DC technique to detect holidays in coatings - even if the coating is damp, dirty or slightly conductive.
- From the two stage safety switch, bright LEDs and screen icons signifying when the high voltage is on, to the extended ribbing to protect the user from spark creep, the Elcometer 280 sets the standard for high voltage measurement safety.