Testing for Pinholes with the Wet Sponge Method using the Elcometer 270 Pinhole Detector

[@sohailzafar7838]

Understood completely.

[@ahmedk.mahmood8244]

many thanks

[@raahemaarifat9900]

detergent water can also be used instead of tap water for conductance?

[@ElcometerOfficialChannel]

Thank you for your comment.
Yes, using a surfactant of any kind will help break down the surface tension of the water, helping it to more easily flow into any pinholes.
If you have any further questions, please contact [e-mail] or visit www.elcometer.com/contact-us to find your local Elcometer distributor.

[@Pam-oq9xd]

This is fascinating. Have you found success or failure with a minimum thickness? Can the voltage be lowered to compensate to almost any thickness?

[@ElcometerOfficialChannel]

Thank you for your comment.
Typically, coatings of any thickness under 500 microns (20mils) can be tested for pinholes using the Elcometer 270, as long as the coating is insulative.
The voltages in the Elcometer 270 are fixed to fall in line with the relevant ASTM, ISO and NACE standards.
9V is suitable for coatings up to 300 microns (12mils) thick, 90V is suitable for coatings up to 500 microns (20mils) thick, and 67.5V is the US standard test requirement.
If you have any further questions, please contact [e-mail] or visit www.elcometer.com/contact-us to find your local Elcometer distributor