Acid Etch

Acid Etch

Acid etch is one aspect of a full suite of non-destructive evaluation (NDE) technologies. It is used to visualize and evaluate indications and locations of pipe features, including arc burns, welds, and other anomalies. That includes microstructure variations that may require detailed evaluation via additional NDE techniques.

Best used for: finding microstructure variations to allow for more detailed inspection

Key feature:

  • Removal of weld splatter, arc strikes, and other material smear that can impact accurate feature evaluation.


  • Can acid etching be used to help identify longitudinal seam weld type? TDW is in the process of developing a long seam identification procedure based on acid etching.