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EPR method

Our specialty is the accurate application of the so-called "electrochemical potentiokinetic reactivation method", an electrochemical test method for determining the sensitivity of corrosion-resistant steels and nickel-based alloys to intergranular corrosion (IC). We offer you this procedure as a stationary testing method in our corrosion laboratory or as a portable variant directly on site.

DL-EPR - Curve (sensitized).jpg

Double loop - EPR scan

Here, as an example, a typical DL-EPR curve of a sensitized, high-alloy steel, in this case a super duplex steel, is shown. The larger the ratio of the areas below the two curves, the higher the degree of sensitization of the material.

EPR measurements using the

The EC - Pen is a very compact, portable electrochemical cell, which can be put directly on components similar to a conventional pen and can be used for very quick evaluation of weld seams or local heat treatments.


EPR - measurements in the corrosion laboratory

With the help of our different, temperature-controlled electrochemical cells, it is possible to carry out quick, quantitative comparisons of material conditions or to compare several material groups with each other using the EPR method.

We are also able to develop a tailor-made EPR test procedure for novel or trademarked materials in order to maximize the sensitivity of this test method.


Portable EPR - measurements at the customer's site

Although we are currently still in the development phase of our innovative, portable corrosion testing device called "Corrosion Ray", reference measurements are already possible directly at the customer's site. The "Corrosion Ray" uses the EPR method to quickly and non-destructively determine the intercrystalline corrosion resistance of materials. Please contact us for further information.

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