铁配合型镁合金缓蚀剂的阴极阻蚀机制  

Cathodic inhibition mechanism of magnesium alloys by using iron-complex inhibitor

作　　者：杨俊杰 王霖倩 Carsten BLAWERT Sviatlana VLAMAKA Christian FEILER Mikhail LZHELUDKEVICH 李卫 Jun-jie YANG;Lin-qian WANG;Carsten BLAWERT;Sviatlana VLAMAKA;Christian FEILER;Mikhail LZHELUDKEVICH;Wei LI(Institute of Advanced Wear&Corrosion Resistant and Functional Materials,Jinan University,Guangzhou 510632,China;Shaoguan Research Institute of Jinan University,Shaoguan 512027,China;Institute of Surface Science,Helmholtz-Zentrum Hereon(Hereon),Geesthacht 21502,Germany;Faculty of Engineering,University of Kiel,Kaiserstraße 2,Kiel 24143,Germany)

机构地区：[1]暨南大学先进耐磨蚀及功能材料研究院,广州510632 [2]暨南大学韶关研究院,韶关512027 [3]Institute of Surface Science,Helmholtz-Zentrum Hereon(Hereon),21502 Geesthacht,Germany [4]Faculty of Engineering,University of Kiel,Kaiserstraße 2,24143 Kiel,Germany

出　　处：《Transactions of Nonferrous Metals Society of China》2024年第5期1496-1506,共11页中国有色金属学报（英文版）

基　　金：National Natural Science Foundation of China(No.52101084);Guangdong Basic and Applied Basic Research Foundation,China(Nos.2023A1515011579,2020A1515110754);Guangzhou Basic and Applied Basic Research Foundation,China(No.202102020612)。

摘　　要：研究阴极缓蚀剂(3-甲基水杨酸盐,3-MeSA)对含铁纯镁腐蚀性能的影响。高铁杂质颗粒成分、腐蚀表面形貌以及3-MeSA分子结构特征为揭示含铁镁合金的腐蚀行为及3-MeSA的阴极型阻蚀机理提供了实验与理论依据。研究结果表明:含铁杂质颗粒中含有固溶态硅,而Fe/Si比可能是导致不同局部腐蚀形态差异的主要原因。虽然3-MeSA能在镁基体上形成吸附层,但其阻蚀机制主要归因于其螯合从富铁颗粒中自腐蚀释放Fe^(2+)/Fe^(3+)的能力,阻止被还原的铁物质再次沉积至腐蚀金属表面。The effect of a cathodic inhibitor(3-methylsalicylate,3-MeSA)on the corrosion properties of Fe-contained pure Mg was investigated.The composition of Fe-rich particles,corrosion surface morphology,and molecular structure of 3-MeSA provide experimental and theoretical evidence for the corrosion behavior of Fe-contained Mg alloy and the corresponding cathodic inhibition mechanism of 3-MeSA.The results showed that silicon in a solid solution within Fe-rich particles was found,and the features of corrosion spots may correlate with different Fe/Si ratios.Although 3-MeSA can form an adsorptive layer on Mg substrate,its inhibition mechanism can be mainly ascribed to the capability to chelate Fe^(2+)/Fe^(3+)ions released from self-corrosion of Fe-rich particles,preventing the re-deposition of the reduced Fe species.

关 键 词：镁 富铁杂质 铁配合剂 阴极型缓蚀剂 量子化学计算 

分 类 号：TG174.42[金属学及工艺—金属表面处理]