Fluorescent Penetrant Inspection
Fluorescent penetrant testing is a highly sensitive dye penetrant test using UV-reactive penetrants to detect microcracks. It improves flaw detection in the dark field.
Physico-chemical mechanism of action
Fluorescent penetrant testing uses special penetrants that glow under UV light. These penetrants are worked into the metal surface and are designed to only become visible when they are in cracks or other defects.
Metallurgical relevance & welding risks
This test is particularly useful for detecting microcracks and defects that are not visible with conventional methods. It can help improve weld quality and detect potential defects early to avoid subsequent problems like hot cracks or corrosion.
Workshop practice & instructions
To perform fluorescent penetrant testing, you first need a UV lamp. The penetrant is worked into the metal surface and then checked with UV light. It is important that the penetrant is applied correctly to get sharp and reliable results. Perform the test regularly, especially on critical welds.