Herein, we report the first electrochemical sensor based on a screen-printed electrode designed to evaluate the corrosion level in iron-reinforced concrete specimens. The combination of an Ag pseudoreference electrode with a gel polymeric electrolyte allows for fast, stable and cost-effective potentiometric measurements, suitable for evaluating the corrosion of iron bars embedded in concrete samples. The sensor was found to be capable of discriminating between a standard non-corroded sample and samples subject to corrosion due to the presence of chloride or carbonate in the concrete matrix. The potential in concrete-based specimens containing carbonate (pH 9, −0.35 ± 0.03 V) or chloride (4% w/w, −0.52 ± 0.01 V) was found to be more negative than in a standard concrete-based sample (−0.251 ± 0.003 V), in agreement with the ASTM standard C876 method which uses a classical Cu/CuSO₄ solid reference electrode. Our results demonstrate that a printed Ag pseudoreference electrode combined with KCl agar provides an efficient and reliable electrochemical system for evaluating the corrosion of iron bars embedded in concrete-based structures.

在此，我们报告了第一个基于丝网印刷电极的电化学传感器，该丝网印刷电极旨在评估铁增强混凝土试样的腐蚀程度。Ag伪参比电极与凝胶聚合物电解质的结合可实现快速，稳定和经济高效的电位测量，适用于评估嵌入混凝土样品中的铁条的腐蚀情况。发现该传感器能够区分标准的未腐蚀样品和由于混凝土基质中存在氯化物或碳酸盐而遭受腐蚀的样品。发现含碳酸盐（pH 9，-0.35±0.03 V）或氯化物（4％w / w，-0.52±0.01 V）的混凝土基样品的电势比标准混凝土基样品（- 0.251±0.003 V），₄固体参比电极。我们的结果表明，印刷的Ag伪参比电极与KCl琼脂相结合提供了一种有效而可靠的电化学系统，用于评估嵌入混凝土基结构中的铁条的腐蚀情况。