Pinhole & Porosity

Pinhole Detection

Suitable for thinner coatings the wet sponge method can easily identify...

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Porosity / Holiday Detection

Elcometer specialise in products designed to identify the location of...

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The main types of flaws are:

• Runs & Sags: Coatings move under gravity leaving a thin dry film.

• Cissing: When a coating does not re-flow to cover the voids generated by air bubbles being released from the surface of a coating.

• Cratering: If the substrate is wet or the coating has poor flow characteristics, voids are created in the coating.

• Pinholes: 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.

• Over Coating: If too much coating is applied, as it cures internal stresses of the coating can cause it to crack.

• Under Coating: Un-coated areas, or where the coating flows away from edges or corners of a substrate or welds.  Insufficient coating over a rough surface profile may also leave the peaks of the profile exposed.