![]() The construction industry is starting to catch up, although current research suggests monitoring is focused on load critical components, especially reinforced concrete rebar. However, they are currently the only significant industry with commonly used, commercially viable monitoring methods. The oil and gas industry have long been aware of the benefits of corrosion monitoring of pipelines. Īn ideal solution would be a wireless, internet of things style sensor system which allows remote, live monitoring of the organic coatings. A significant amount of emerging research in this field shows the appetite for this technology. ![]() ![]() Real time monitoring could allow more accurate estimates of building cladding lifespan, as well as required maintenance schedules, providing the customer with active performance data. Ĭurrently, coatings used on construction panels are rarely monitored in-situ and the expected performance of the overall building envelope is often only estimated from lab-based accelerated corrosion testing. Hence, one widely suggested strategy for corrosion protection is to ‘develop advanced life prediction and performance assessment methods and to move to a greater degree of corrosion monitoring. Despite this, it has been suggested by some studies that the reason for the high cost of corrosion is due, in part, to the poor selection of protective measures. In fact, in 2020, the EU produced 130 million metric tonnes of hot rolled steel, of which 5 million metric tonnes was organically coated. Organic coatings are widely used in the construction industry for aesthetic, corrosion protection, and weather resistance reasons. Experimental results showed that changes to the dielectric properties of the coating through both the uptake of water and chemical degradation were detected through changes in the resonant frequency. For coatings thinner than calculations would suggest to be optimum, it was found that the simulated response could be improved by the use of a thin substrate between the coated sample and the antenna without vastly affecting results. ![]() Simulating multiple aging effects simultaneously produced a linear reduction in tag resonant frequency, suggesting coating monitoring and lifetime estimation may be possible via this method. This may be used to determine the condition of the organic coating. Simulations indicated that changes associated with organic coating degradation, such as the formation of defects and electrolyte uptake, produced changes in the backscattered radar cross section tag response. This paper presents a chipless, passive antenna tag, which can be applied onto organically coated steel. Coating degradation is a critical issue when steel surfaces are subject to weathering. ![]()
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