Anodic Behavior of AK7 Aluminum Alloy and Composite Material of the Al–Al₂O₃ System within an NaCl Electrolyte Solution Medium

Results are provided for a study of the anodic behavior of aluminum alloy AK7 and composite material of the Al–Al₂O₃ (Oxidal) system in an electrolyte medium of 0.03, 0.3, and 3.0% NaCl. Corrosion-electrochemical study of alloys shows that with an increase in chloride ion concentration within electrolyte alloy corrosion rate increases by a factor of 1.3–1.7. It is shown that composite material of the Al–Al₂O₃ system has better corrosion resistance than the original AK7 alloy. At the same time, alloy pitting resistance also increases, as shown by the shift in pitting and corrosion potentials into a positive range of values.