Suchen
Toggle Nav
Menu
Account
Porosity_Banner

Detecting Pinholes and Porosity

Premature corrosion of a substrate is usually due to a coating failure. A common cause is the presence of flaws in the finished coating. Collectively referred to as porosity, the main types of flaws are: Runs & Sags, Cissing, Cratering, Pinholes, Over Coating and Under Coating.

Types of Flaws

When a coating is applied to a surface, a number of problems can occur which can cause problems later on in the life of the coating.

Click Here

Flaw Detection Methods

There are essentially three flaw detection methods; UV Pinhole Detection, Wet Sponge and High Voltage.

Click Here

Calculating the Required Voltage

For effective testing, the output voltage must lie between certain upper and lower limits.

Click Here

Problem Surfaces

If the displayed voltage drops or the alarm sounds continuously, then the coating may be conductive.

Click Here

Pulsed DC Holiday Detection

Pulsed DC can be used to test for holidays over slightly conductive coatings, dirty or damp surfaces.

Click Here

High Voltage Detector Accessories

There are a wide range of probes available to suit all applications and substrates being measured.

Click Here