Abstract:
Monitoring concrete structures is crucial for assessing the corrosion risk of steel reinforcement and
optimizing maintenance strategies. This study evaluated the MnO₂/NaOH, Ag/AgCl, and Ti/MMO permanent, embeddable reference electrodes, which are rarely known or used in Brazil for corrosion monitoring. The electrodes underwent assessment tests, immersion tests in solutions simulating concrete pore water, and a test in a reinforced concrete specimen. Results showed that the relative potentials of
the electrodes in each immersion test did not always align with those in the assessment test, emphasizing
the influence of the medium’s characteristics on electrode selection and performance evaluation. However, the potentials remained stable and reproducible among units of each type in all tests. Long-term field tests in various conditions are relevant to validate their performance, considering environmental factors and Brazilian construction standards
Referência:
ARAUJO, Adriana de; BRUNELLI, Renata Angelon; PANOSSIAN, Zehbour. Evaluation of permanent embeddable reference electrodes in solution and concrete specimen. In: INTERNATIONAL FIB SIMPOSIUM ON CONCEPETUAL DESIGN OF STRUCUTRES. 2025, Rio de Janeiro. Lecture…17 slides
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