We widely recognize that hydrogen can induce embrittlement in metal structures and components. Specifically, hydrogen-induced delayed fracture poses significant risks for High Strength Steels. This type of Steels are extensively applied in the automotive industry and various sectors.
To promote new standards of safety and performance, as well as to embrace the inevitable challenge represented by the energy transition, CEN-CENELEC has approved a CWA. This CWA describes how to perform measurements of diffusible H directly in metallic components, such as vehicle chassis, by using HELIOS 4 HOT PROBE equipment.
The optimization of the HELIOS 4 HOT PROBE equipment occurred as part of the FormPlanet Horizon 2020 project. This initiative marks the initial stride towards enabling industrial online monitoring of diffusible hydrogen and evaluating sheet metal part quality directly during manufacturing, using a non-destructive approach.

This approach offers an alternative test method to the Barnacle electrode (ISO 15724:2001). HELIOS 4 Hot Probe uses a solid-state sensor which does not require surface preparation nor electrolytic solution. The sensor detects hydrogen atoms that diffuse out of the metal due to the localized heating of the component. Ad hoc calibration permits quantitative results for the material under investigation.

To learn more about CWA you can downloaded the link provided below:

CWA 17794:2021 Measurement of diffusible hydrogen in metallic materials-HELIOS 4 HOT PROBE method

Find out more details on HELIOS 4 HOT PROBE in the area HYDROGEN EMBRITTLEMENT/PRODUCTS