Praveen B M, Jeevan Chakravarthy A S, Prasanna B M, Devendra Bharath K, Pavithra M K
Department of Chemistry, Institute of Engineering and Technology, Srinivas University, Mukka, Mangaluru, Karnataka, 574146, India.
Department of Chemistry, BMSIT&M (Affiliated to Visvesvaraya Technological University, Belagavi), Avalahalli, Yelahanka, Bengaluru, Karnataka, 560064, India.
Sci Rep. 2025 Jan 3;15(1):720. doi: 10.1038/s41598-024-83054-7.
Newly synthesized 1-bromo-2-(4-bromophenylsulfonate)-4,4-dimethyl-1-cyclohexenyl-6-one (CHD) as a potential anticorrosive agent in an acidic medium at an elevated temperature range of 305-335 K. This synthesized compound confirmed by spectral characterizations and it acts as a coating on mild steel surfaces in 1 M Hydrochloric acid (HCl) solution through electrochemical reactions. The synthesis of the compound has been discussed, and the Infrared (IR) and Nucleic Magnetic Resonance (NMR) spectral analysis confirmed the derivative. Afterward, the synthesized compound was subjected to various electrochemical investigations. This suggested that in 1 M Hydrochloric acid (HCl), the compound efficiently prevents mild steel corrosion. Potentiodynamic polarisation studies demonstrate that the E values for treated and untreated samples are within ± 85 mV, compound inhibits mild steel in 1 M Hydrochloric acid (HCl) via a mixed-type mechanism. Electrochemical techniques have proved the potential of the synthesized compound as a corrosion inhibitor bearing a maximum inhibition efficiency greater than 95% for optimised concentrations up to 25 ppm. The obtained results are supported by scanning electron microscopic images, thermodynamic parameters, and quantum mechanical considerations. ΔG value from thermodynamic studies indicates the spontaneous adsorption of the inhibitor compound onto the Surface of mild steel.
新合成的1-溴-2-(4-溴苯基磺酸酯)-4,4-二甲基-1-环己烯基-6-酮（CHD）作为一种潜在的缓蚀剂，在305-335 K的高温酸性介质中发挥作用。该合成化合物通过光谱表征得到确认，它在1 M盐酸（HCl）溶液中通过电化学反应在低碳钢表面形成涂层。文中讨论了该化合物的合成过程，红外（IR）和核磁共振（NMR）光谱分析证实了该衍生物。之后，对合成的化合物进行了各种电化学研究。结果表明，在1 M盐酸（HCl）中，该化合物能有效防止低碳钢腐蚀。动电位极化研究表明，处理过和未处理的样品的E值在±85 mV范围内，该化合物在1 M盐酸（HCl）中通过混合型机制抑制低碳钢腐蚀。电化学技术证明了合成化合物作为缓蚀剂的潜力，对于高达25 ppm的优化浓度，其最大抑制效率大于95%。扫描电子显微镜图像、热力学参数和量子力学考量支持了所得结果。热力学研究中的ΔG值表明抑制剂化合物在低碳钢表面的自发吸附。
