macroEtch inspection

Metal macroetch inspection is a non-destructive testing technique used to examine the macrostructure of metallic materials. It involves etching the surface of a metal sample to reveal its macroscopic features, such as grain size, inclusions, segregation, and discontinuities.

Macroetch examination is often performed on welds to assess quality or on fracture surfaces to correlate surface characteristics with failure mechanisms.

Macroetch inspection is an effective method for detecting macroscopic defects in metallic materials. It can reveal surface cracks, laps, seams, porosity, and other discontinuities that may affect the material's integrity and performance. By identifying these defects early on, manufacturers can take corrective measures to prevent further propagation or failure.

For welds, etching a the cross section may reveal internal discontinuities, weld profile, extent of penetration and the quality of weld. The macro structural properties of a weld can be used for procedure qualification or personnel qualification. MES often utilizes high resolution digital imaging during macroscopic examination. If the investigation requires higher magnification imaging, we can provide metallographic examination or scanning electron microscopy.

Metal macroetch inspection offers several benefits, including defect detection, process monitoring, material characterization, failure analysis, quality assurance, and research and development. It is a valuable tool for ensuring the quality and reliability of metallic materials in industries such as manufacturing, automotive, aerospace, and construction.



  • Macro-etch

  • Grain Flow

  • Weld Qualification

  • Surface Condition

  • Digital Imaging


  • ASME Sect. IX - Welding/Brazing of Pressure Vessels

  • ASTM E340 - Macroetch Testing Metals and Alloys

  • ASTM E381 - Macroetch Testing Steel Bars, Billets, Blooms, and Forgings


  • Cross sections up to 10 in. diameter