How to Perform a Removability Test Using NDT Water-Based Fluorescent Penetrants

Today we will be performing and guiding you through a step-by-step removability test using two different water-based fluorescent penetrants, Magnaflux's ZL-425 and a competitor's. A removability test is performed to confirm acceptable fluorescent background on the part surface. It's important to have high contrast between the fluorescent background and indications. Otherwise, NDT technicians could risk eye fatigue or miss indications on a part.
If a penetrant testing user is evaluating penetrants, they would apply the penetrant to actual test parts, rinse for the time specified, and then confirm acceptable levels of fluorescent background. If the penetrant testing (PT) user is running Known Defect Standard panels (NiCr or TAM panels, for example), they can compare brightness and detectability of indications along with acceptable fluorescent brightness.
0:00 Introduction to removability
1:15 Application and dwell time of penetrant
1:53 Washing the panel
2:08 Placing removability panel in drying oven
2:28 Applying dry developer
2:46 Comparing results
Want to see an example of what these panels would look like with indications on them?
Watch our Sensitivity Test video here, where we compare Magnaflux's ZL-425 to a competitor:
What is ZL-425 and how can I use it for my non-destructive testing (NDT) jobs?
ZL-425 is a water-based, water washable fluorescent penetrant used for finding indications in castings, forgings, extrusions, and other materials with rough surfaces, commonly found in automotive part applications. ZL-425 is an ideal solution when wastewater produced during the inspection process is a concern for the operation. ZL-425 is water-based and contains no petroleum distillates allowing it to drain directly into the sewage system depending on local regulations.
ZL-425 has been specifically developed for use within the automotive sector and can also be used in applications where traditional petroleum solvent-based penetrants may attack the surface, such as plastics. The penetrant features great rinse characteristics allowing it to be self-developing, so you may not need to use a separate developer depending on the application.
ZL-425 is designed to be environmentally sensitive while meeting industry approvals, including EN ISO 3452-2 and AMS 2644, and can be used in place of any conventional water-washable fluorescent penetrant.
Find out more information on Magnaflux's ZL-425 here:
www.magnaflux.com/NA/EN/Produ...
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[@anupamsyco]

Thanks, this will help lot of L2 and L3s!
Keep up the great work!