Versa’s Eddy Current division utilized
Electromagnetic Testing (ET) to detect erosion defects in this case
study. Below is a high-level overview of a project that our Baton Rouge
Eddy Current division successfully completed.

We utilized the ET Array Technique to
more accurately size ID erosion defects that were occurring due to
de-alloying of 90-10 copper nickel. As the 90-10 copper nickel gradually
changed to 99.5% copper and .5% nickel, the primary damage mechanism of
ID erosion started to occur. The Array Technique could pinpoint the
defects on the tube circumferential and more accurately size the defect,
compared to the Bobbin Technique, which uses more of an averaging of
the tube wall around the tube. As a side benefit, we were able to
precisely decipher between the de-alloying damage mechanism and the ID
erosion damage mechanism; this was due to utilizing the ET Array
Technique.


If you have any questions or would like
to learn more, please reach out to our Eddy Current Supervisor (Baton
Rouge, LA), Scott Whipkey at Scott.Whipkey@versaintegrity.com.
Source: https://www.versaintegrity.com/2020/01/02/using-the-et-array-technique-on-de-alloyed-90-10-copper-nickel/