Inhibition Effect of Sodium Molybdate on Friction Stir Weld of 5083 in Aqueous Solution

Abstract:

Similar welds composed of 5083 were produced by friction stir welding. In the solution of 0.2 M NaHSO₃ and 0.6 M NaCl, the electrochemical corrosion behaviors of the friction stir welds (FSW) and 5083 were comparatively investigated by static weight loss experiments and potentiodynamic polarization curve tests at the ambient temperature. The results indicated that the average corrosion rate of the weld was less than that of 5083. Then, sodium molybdate was added to the corrosive solution and its effect on the corrosion behaviors of the weld and parent metal was comparatively assessed. The inhibition efficiency (IE) for the weld was beyond that for 5083 base materials, sodium molybdate may be thought of as an effective inhibitor.

• Periodical: Applied Mechanics and Materials (Volumes 249-250)
• Pages: 870-873
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.249-250.870
• Online since: December 2012
• Authors: Chang Bin Shen
• Keywords: AA5083 Aluminum Alloy, Friction Stir Welding (FSW), Inhibitor, Sodium Molybdate, Weld

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