Role of Chloride Ion and Dissolved Oxygen in Electrochemical Corrosion of AA5083-H321 Aluminum-Magnesium Alloy in NaCl Solutions under Flow Conditions

摘要: Flow-induced corrosion consists electrochemical and mechanical components. The present paper has to assessed the role of chloride ion dissolved oxygen in component flow induced for AA5083-H321 aluminum-magnesium alloy which is extensively used construction high-speed boats, submarines, hovercrafts, desalination systems, NaCl solutions. Electrochemical tests were carried out at velocities 0, 2, 5, 7 10 m/s, aerated deaerated solutions with dierent sodium concentrations. results showed that high rate reduction under hydrodynamic conditions causes an increase density pits on surface. ions concentration accelerates anodic reactions, but have no influence cathodic reactions. Thus, current work, it was found conditions, due elimination products inside pits, resistance increased.