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Tracking Steel Corrosion in Halide Solutions with a pH Stimuli Responsive Polymer

Joshua S. Hanna, James W. Rawlins


In situ and non-invasive corrosion monitoring was accomplished using a simple spectroscopic technique in combination with a recently synthesized fluorescent pH stimuli responsive polymer. The characterization protocol quantified the relative standard deviation of the average fluorescence intensity over the entire steel substrate to quantify the onset of corrosion using up to 1536 data points. Statistically relevant data for coated substrates exposed to a series of different environments were able to provide a corrosivity ranking at a high level of confidence. In this paper, the methods and capability of the combined approach were confirmed to correlate corrosion severity versus different halide salts, matching trends already established in literature with time to initiate corrosion.

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