biostudies-literatureYang QDepartment of Human Resources and Social Security of Sichuan ProvinceNational Natural Science Foundation of ChinaPetroChina Key technical research on Marine oil and gas development and engineeringKey R&D Program of Science and Technology Department of Sichuan Province1314https://www.ebi.ac.uk/biostudies/studies/S-EPMC9920852biostudies-literatureUnknown28(3)To provide carbon steel a long-term corrosion protection effect in NaCl solutions with different pH values, based on poly-acrylamide (<i>PAM</i>) and oleate imidazoline (<i>OIM</i>), a solid corrosion inhibitor with the properties of pH-controlled release was synthesized. SEM, FTIR and TGA results indicated that the <i>OIM</i> inhibitors were successfully loaded into <i>PAM</i> hydrogel with a high <i>OIM</i> encapsulation content (39.64 wt.%). The <i>OIM</i> release behavior from the hydrogel structure has two stages, quick release and sustained release. The pH of solutions could affect the initial release kinetics of <i>OIM</i> inhibitors and the diffusion path in the hydrogel structure. Weight loss measurement of L80 steel in different pH solutions with <i>OIM@PAM</i> proved the inhibitor responsive release mechanism and anticorrosion performance. The inhibition efficiency of <i>OIM@PAM</i> can maintain over 80% after long-term immersion in a harsh corrosive environment (pH 3), which is much higher than the inhibition efficiency of <i>OIM@PAM</i> in a moderate corrosive solution.Molecules (Basel, Switzerland)A pH-Controlled Solid Inhibitor Based on <i>PAM</i> Hydrogel for Steel Corrosion Protection in Wide Range pH NaCl Medium.PMC99208522021ZYD00992021DJ25032020 Post Doctor Scientific Research Special Foundation522010882021ZDZX0002Tang JLin BZheng HZhang YZhang HNie ZYang QWang YfalseA pH-Controlled Solid Inhibitor Based on <i>PAM</i> Hydrogel for Steel Corrosion Protection in Wide Range pH NaCl Medium.To provide carbon steel a long-term corrosion protection effect in NaCl solutions with different pH values, based on poly-acrylamide (<i>PAM</i>) and oleate imidazoline (<i>OIM</i>), a solid corrosion inhibitor with the properties of pH-controlled release was synthesized. SEM, FTIR and TGA results indicated that the <i>OIM</i> inhibitors were successfully loaded into <i>PAM</i> hydrogel with a high <i>OIM</i> encapsulation content (39.64 wt.%). The <i>OIM</i> release behavior from the hydrogel structure has two stages, quick release and sustained release. The pH of solutions could affect the initial release kinetics of <i>OIM</i> inhibitors and the diffusion path in the hydrogel structure. Weight loss measurement of L80 steel in different pH solutions with <i>OIM@PAM</i> proved the inhibitor responsive release mechanism and anticorrosion performance. The inhibition efficiency of <i>OIM@PAM</i> can maintain over 80% after long-term immersion in a harsh corrosive environment (pH 3), which is much higher than the inhibition efficiency of <i>OIM@PAM</i> in a moderate corrosive solution.2023-01-01T00:00:00Z2023 Jan2025-04-25T19:18:16.99Z2025-04-06T07:57:37.367ZS-EPMC99208523677098410.3390/molecules28031314