# Monitoring of Reinforced Concrete Corrosion: Active and Passive Bars Exposed to Climate
## 5 Conclusions  
The MONITORIZA method for measuring the corrosion rate was employed to demonstrate the evolution of durability parameters for two components: a beam and a tendon. This method allowed us to correlate the variation in these parameters with the presence  
Figure 13: Corrosion depth in the reinforcement versus time in days.  
or absence of contaminants (chlorides) and, importantly, the influence of the climate. Our study was conducted in Madrid, Spain.  
It is necessary to employ direct measurement in order to estimate the corrosion rate, as the corrosion potential and resistivity alone are unable to provide this information. While the corrosion potential can indicate the likelihood of corrosion on reinforcement, the decisive factor for corrosion to occur is the presence of water and depassivating agents. On the other hand, resistivity is precisely related to moisture content. However, there is a large dispersion depending on the condition of the reinforcement. Therefore, it is necessary to measure the corrosion rate directly on the reinforcement itself.  
The methodology presented in this work will allow direct information to be obtained on the durability of structures exposed to different environments. It is especially relevant to be able to characterise those structures that are in more aggressive environments, such as those exposed to tidal races, but also critical structural components, such as pre- or post-tensioned steels in which any type of depassivation or onset of corrosion must be avoided. This is the first requisite for the prediction of the future behaviour of reinforced concrete structures and even for the adaptation of regulations in accordance with these results. Conversely, the utilisation of novel steels or cements can modify the durable behaviour of structures, without consideration of the impact of repair on the remainder of the structure. For these reasons, direct control over the structures themselves represents an advance in knowledge that can be approached with the use of new tools for data analysis and interpretation.  
The digitization of structures and the implementation of a predictive maintenance plan both require monitoring. As demonstrated, it is feasible to estimate real-time section loss for both active and passive reinforcement. This enables the feeding of durability models and digital twins, which can assess the structure's safety. If repairs are made to the structure, this system also allows for the evaluation of the repair's durability.  
Conceptualization, N.R. and J.S.; methodology, A.S. and J.E.T.; software, J.S.; validation, all authors; formal analysis, all authors; investigation, N.R.; resources, J.E.T.; data curation, A.S.; writing--original draft preparation, all authors; writing--review and editing, all authors; visualization, all authors; supervision, J.S. All authors have read and agreed to the published version of the manuscript.  
This research received no external funding.  
Not applicable.  
The raw data supporting the conclusions of this article will be made available by the authors on request.  
The authors declare no conflicts of interest.