GEOMET® analyzed with Scanning Vibrating Electrode Technique

Effective protection against corrosion is not limited to a single barrier effect. In challenging environments, it must be active.

This is where sacrificial protection comes in: a principle where a less noble metal (such as zinc) oxidizes first to protect the underlying steel.

EXPERIMENT

We applied a GEOMET® coating to a steel plate, then created a scratch down to the metal before immersion in a salt solution. Using SVET (Scanning Vibrating Electrode Technique), we mapped the electrochemical activity in real time.

RESULTS

🔵Passive cathodic zones: the exposed steel does not oxidize – proof that it is protected.

🔴Active anodic zones: the zinc in GEOMET® oxidizes first, sacrificing itself to protect the steel.

CONCLUSION

GEOMET® doesn’t just form a barrier, it actively acts to prevent corrosion of the substrate. Scientific proof of the effectiveness of the combined protection (barrier + sacrificial) it provides to maximize the durability of metal parts! You can see some pictures about the experiment below.

Want to find out more about these advanced analyses and their impact on anti-corrosion performance?

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