Aluminium part welding seam analysis with Keller etching acid

19.08.2016

Toptester introduces a new service to expand the test house competence to aluminium part welding seam quality inspection. Toptester is using Keller etching acid, x-ray and penetrant testing to bring visible the voids in the metal. The procedure is well suitable for inspection of liquid penetration in cracks and the welding seam start and end failures.
 
Keller etching acid is known to be the best liquid to emphasize failures in aluminium welding  seams as well as bringing visible the seam of basic material and weld in a polished test sample. Etching enables the microscope studies of the weld seam as the attached picture shows.

 

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