New York Shot peening
The Peenscan process is ideal for measuring uniformity and extent of coverage on a shot peened part.

Determining shot peening coverage on softer materials can be fairly easy because the dimples are quite visible. A 10-power (10X) magnifying glass is more than adequate for these conditions.

However, in many applications determining shot peening coverage is more difficult. Internal bores, tight radii, extremely hard materials and large surface areas present additional challenges in determining coverage. Metal Improvement Company developed the Peenscan process for this reason.

We apply the fluorescent tracer liquids used in the Peenscan process by brushing, spraying or dipping it onto a part and allowing it to dry. This forms a fluorescent elastic coating, which is removed at a rate proportional to the percentage of shot peening coverage. By examining the part under UV (black) light, the Peenscan process provides a practical method of determining peening coverage in terms of the amount and uniformity of fluorescent tracer removal. The Peenscan process has proven to be clearly superior to inspection using a 10X glass alone.

The Peenscan tracer liquid coating responds to all intensity ranges. Low angle of shot impingement or low shot peening coverage will not remove all of the Peenscan tracer coating. Uneven peening and hot spot concentration can be seen easily by patterns on the remaining coating.

Many aerospace, automotive and industrial manufacturers approve the use of the Peenscan process.