Fluorescent Penetrant Testing

 Fluorescent Penetrant Testing

Fluorescent penetrant testing is Applies equally to ferrous and nonferrous castings to find cracks and voids that should only have superficial defects. The test surface is a surface with a clean and liquid penetrating agent that should have low spraying tension so that it can be easily drawn into all surface boxes.

The penetration time depends on the size of the wad type opening and the casting metal. It is then cleaned and dried with casting water. This is followed by a dry casting sprayer and the time allotted for growth is usually half the time of penetration. This inspection is done under black light. The infiltrating solution bleeds during development and clarifies defects. Excessive amounts of the solution bleed, leaving a large amount of R in the casting surface.