Effect of sodium vanadate on corrosion of AD31 aluminum alloy in acid media |
| |
Authors: | D S Kharitonov I I Kurilo I M Zharskii |
| |
Institution: | 1.Belarusian State Technological University,Minsk,Belarus;2.KTH Royal Institute of Technology,Stockholm,Sweden |
| |
Abstract: | Scanning electron microscopy, potentiodynamic polarization method, and electrochemical impedance spectroscopy were used to study the corrosion behavior of AD31 (AA6063) aluminum alloy in acid (pH 3) 0.05 M NaCl solutions containing 3 mmol dm–3 of NaVO3 inhibitor. It was found that the corrosion of AD31 alloy in acid sodium chloride solutions predominantly occurs locally at aluminum/intermetallic particle phase boundaries and is limited by the electrochemical stage of charge transfer. It was shown that introduction of sodium vanadate can reduce the rate of selective dissolution of magnesium from the alloy and provides a protective effect on the level of 7–10%. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|