{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,3]],"date-time":"2026-10-03T00:34:45Z","timestamp":1790987685580,"version":"4.1.0"},"reference-count":62,"publisher":"American Chemical Society (ACS)","issue":"5","license":[{"start":{"date-parts":[[2021,1,25]],"date-time":"2021-01-25T00:00:00Z","timestamp":1611532800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/pubs.acs.org\/page\/policy\/authorchoice_ccbyncnd_termsofuse.html"}],"funder":[{"DOI":"10.13039\/na","name":"Deputyship for Research and Innovation, Ministry of Education Saudi Arabia","doi-asserted-by":"publisher","award":["510"],"award-info":[{"award-number":["510"]}],"id":[{"id":"10.13039\/na","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2021,2,9]]},"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:p>In this report, two chromotrope dyes, chromotropic acid (CA) and chromotrope 2R (CR), were explored as inhibitors against mild steel corrosion in 1.0 M sulfuric acid solutions at 303 K. Electrochemical, spectroscopic, chemical, and microscopic techniques, namely, potentiodynamic polarization (PDP), electrochemical impedance spectroscopy, mass loss, and scanning electron microscopy (SEM), have been employed to evaluate the inhibition efficiencies (%IEs) of the examined organic dyes. The %IEs were found to increase with the inhibitors\u2019 concentrations, while they decreased with rising temperature. The outcomes of the PDP technique displayed that the examined inhibitors operated as mixed-type inhibitors with anodic prevalence. The impedance spectra described by Nyquist and Bode graphs in the corrosive environment and in the presence of various concentrations of the examined inhibitors showed single depressed capacitive loops and one-time constants. This behavior signified that the mild steel corrosion was managed by the charge transfer process. The SEM micrographs of the surfaces of mild steel samples after adding the examined inhibitors revealed a wide coverage of these compounds on the steel surfaces. Thus, the acquired high %IEs of the examined inhibitors were interpreted by strong adsorption of the organic molecules on the mild steel surface. This constructed a shielding layer separating the alloy surface from the corrosive medium, and such adsorption was found to follow the Langmuir isotherm. Furthermore, the evaluated thermodynamic and kinetic parameters supported that the nature of such adsorption was mainly physical. Results obtained from all employed techniques were consistent with each other and revealed that the %IE of the CR inhibitor was slightly higher than that of CA under similar circumstances. Finally, the mechanisms of both corrosion of mild steel in sulfuric acid solutions and its inhibition by the tested organic dyes were also discussed.<\/jats:p>","DOI":"10.1021\/acsomega.0c06121","type":"journal-article","created":{"date-parts":[[2021,1,25]],"date-time":"2021-01-25T19:14:34Z","timestamp":1611602074000},"page":"4051-4061","source":"Crossref","is-referenced-by-count":61,"title":["Inhibition Evaluation of Chromotrope Dyes for the\nCorrosion of Mild Steel in an Acidic Environment: Thermodynamic and\nKinetic Aspects"],"prefix":"10.1021","volume":"6","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-0668-8972","authenticated-orcid":true,"given":"Ahmed","family":"Fawzy","sequence":"first","affiliation":[{"name":"Umm Al-Qura University , , ,","place":["Makkah, Saudi Arabia, 21955"]},{"name":"Assiut University , , ,","place":["Assiut, Egypt, 71516"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Arafat","family":"Toghan","sequence":"additional","affiliation":[{"name":"South Valley University , , , ,","place":["Qena, Egypt, 83523"]},{"name":"Imam Mohammad Ibn Saud Islamic University (IMSIU) , , ,","place":["Riyadh, Saudi Arabia, 11623"]}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"316","published-online":{"date-parts":[[2021,1,25]]},"reference":[{"key":"2026090210021579300_cit1","doi-asserted-by":"publisher","first-page":"3033","DOI":"10.1016\/j.corsci.2010.05.022","article-title":"Inhibition\nof mild steel corrosion\nin acid solution by Pheniramine drug: experimental and theoretical\nstudy","volume":"52","author":"Ahamad","year":"2010","journal-title":"Corros. 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