标题：Experimental and Theoretical Studies of Cysteine and Melamine as Corrosion Inhibitors on Carbon Steel in Phase-Change-Materials Solution
作者：Zhang, Zhe; Zhang, Weipeng; Li, Wenwu; Huang, Xiaodong; Ruan, Le; Wu, Ling
作者机构：[Zhang, Zhe; Zhang, Weipeng; Li, Wenwu; Huang, Xiaodong; Ruan, Le] Guilin Univ Technol, Guangxi Key Lab Electrochem & Magnetochem Funct M, Coll Chem & 更多
通讯作者地址：[Ruan, L]Guilin Univ Technol, Guangxi Key Lab Electrochem & Magnetochem Funct M, Coll Chem & Bioengn, Guilin 541004, Peoples R China.
来源：INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE
关键词：Carbon steel; SEM; XPS; Quantum chemical calculation; Molecular dynamics; simulation
摘要：The corrosion protection performance of cysteine (Cys) and melamine (Mel) on 1045 carbon steel (CS) in a phase-change-material (PCM) solution has been studied by electrochemical impedance spectroscopy (EIS), potentiodynamic polarization (PDP) measurements, scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS). The EIS results showed that Cys and Mel can protect CS from corrosion in a PCM solution, and that a combined Cys/Mel inhibitor can increase the corrosion protection efficiency, achieving a value of up to 96.3%. The PDP measurements confirmed that Cys, Mel and combined Cys/Mel inhibitors can all protect CS from corrosion. The SEM micrographs showed that all three inhibitors can prevent the corrosion of CS in a PCM solution. The XPS results showed that Cys and Mel can adsorb onto the CS surface to form films, thereby inhibiting CS corrosion in PCM solutions. Quantum chemical calculations and molecular dynamics (MD) simulations were used to theoretically investigate the inhibition mechanism.