Application of Hydrogen Ingress Techniques

Straightforward. However, in other cases they do affect the measured current transients and therefore should be taken into account when analyzing the data. The potential impact of materials issues, such as corrosion, surface films, and trapping, as well as charging conditions are considered in this section. In addition, the critical question of diffusion control is examined, because it underlies the various methods for studying hydrogen ingress. 

An alternative approach to using a coating is to correct the measured anodic current for any other contribution, such as that from metal oxidation. This approach is suitable for pulse methods where the potential for hydrogen oxidation Ea) can be selected to be slightly negative (5-10 mV) of the corrosion potential. When the potential is stepped back to the measured current (/j ) for an uncoated surface contains contributions from H atom oxidation (z h), metal oxidation (/, ), and reduction of H or H2O (/V)  

The steady-state current is represented by the term and can be applied as a small correction to the measured transient to obtain the current associated solely with hydrogen oxidation. In 

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