2-Hydroxy-4-methoxy-acetophenone as an environment-friendly corrosion inhibitor for AZ91D magnesium alloy |
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| Affiliation: | 1. Faculdade de Ciências Exatas e Tecnologia, Universidade Federal da Grande Dourados, Rodovia Dourados — Itahum, km 12, P.O. Box 364, 9804-970 Dourados, MS, Brazil;2. CQE, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal;3. Departamento de Eng. Metalúrgica e de Materiais, Escola Politécnica da Universidade de São Paulo, Av. Prof. Mello Moraes n. 2463, 05508-030 São Paulo, SP, Brazil;4. Departamento Físico-Química, Instituto de Química, Universidade Estadual Paulista, UNESP, P.O 355, 14801-970 Araraquara, SP, Brazil;1. MagIC—Magnesium Innovation Centre, Helmholtz-Zentrum Geesthacht, Max-Planck Str. 1, 21502 Geesthacht, Germany;2. University of Vilnius, Department of Inorganic Chemistry, 03225 Vilnius, Lithuania;3. University of Aviero, Department of Materials and Ceramic Engineering/CICECO, 3810-193 Aveiro, Portugal;1. Centro de Química Estrutural, Departamento de Engenharia Química, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, Lisbon 1049-001, Portugal;2. ESTSetúbal, CDP2T, Instituto Politécnico de Setúbal, Setúbal 2910-761, Portugal |
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| Abstract: | The inhibition behavior of 2-hydroxy-4-methoxy-acetophenone (paeonol) as an environment-friendly corrosion inhibitor for AZ91D magnesium alloy was investigated in 0.05 wt.% NaCl solution by means of polarization curve, AC impedance, weight loss measurement, scanning electron microscopy, Fourier transformation infrared spectroscopy, ultraviolet analysis, and computer molecular simulation. The results show that paeonol can inhibit the corrosion of AZ91D. The maximum inhibition efficiency is achieved when paeonol concentration is 50 ppm by weight in this study. It is proposed that paeonol chelates with Mg to form a paeonol-Mg complex mixing with the original Mg(OH)2 film on the surface to inhibit the anodic dissolution of AZ91D. |
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| Keywords: | Magnesium alloy Inhibitor Corrosion Inhibition |
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