Accelerated corrosion of low carbon steel by oscillatory acidic streams generated with a bio-inspired claw device
PLoS ONE, ISSN: 1932-6203, Vol: 19, Issue: 4 April, Page: e0298266
2024
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Article Description
A mechanical device inspired by the pistol shrimp snapper claw was developed. This technology features a claw characterized by a periodic opening/closing motion, at a controlled frequency, capable of producing oscillating flows at transitional Reynolds numbers. An innovative method was also proposed for determining the corrosion rate of carbon steel samples under oscillating acidic streams (aqueous solution of HCl). By employing very-thin carbon steel specimens (25 μm thickness), with one side coated with Zn and not exposed to the stream, it became possible to electrochemically sense the Zn surface once the steel sample was perforated, thus providing the average dissolution rate into the most relevant pit on the steel surface. Furthermore, a laser light positioned beneath the metallic sample, along with a camera programmed to periodically capture images of the steel surface, facilitated the accurate counting of the number of newly formed pits. The system consisting of the thin steel sample and the Zn coating can be seen as a type of corrosion sensor. Furthermore, the proposed laser illumination method allows corroborating the electrochemical detection of pits and also establishing their location. The techniques crafted in this study pave the way for developing alternative corrosion sensors that boast appealing attributes: affordability, compactness, and acceptable accuracy to detect in time and space localized damage.
Bibliographic Details
http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=85189320820&origin=inward; http://dx.doi.org/10.1371/journal.pone.0298266; http://www.ncbi.nlm.nih.gov/pubmed/38573921; https://dx.plos.org/10.1371/journal.pone.0298266; https://dx.doi.org/10.1371/journal.pone.0298266; https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0298266
Public Library of Science (PLoS)
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