Al 2014 is a high-strength aluminum alloy widely used in the aerospace and automotive industries for its mechanical robustness. This study investigates the impact of three heat treatment processes—Retrogression and Re-aging (RRA), T6 standard aging, and a modified RRA with high-temperature pre-aging—on the hardness and corrosion resistance of Al 2014. Potentiodynamic electrochemical polarization studies in a 3.5 wt% sodium chloride solution assessed corrosion resistance, revealing that heat treatment, which induces precipitation hardening, shifted the corrosion potential (E) toward the noble direction. The formation of Al2Cu precipitates is linked to enhanced corrosion resistance. Furthermore, T6-treated samples exhibited a higher corrosion current density compared to untreated Al 2014 alloy samples, suggesting superior corrosion resistance. Scanning electron microscopy (SEM) with energy-dispersive X-ray spectroscopy (EDS) analysis of corroded surfaces showed evidence of general and pitting corrosion, with distinct patterns among the three heat treatment processes. Comparative analysis revealed that the T6 standard aging process offered the best hardness and corrosion resistance, likely due to stable precipitate formation during aging. RRA also delivered good performance, suggesting it is a viable alternative where a balance between hardness and toughness is needed. The modified RRA with high-temperature pre-aging yielded lower performance, likely due to overaging, reducing hardness and corrosion resistance. These findings underscore the importance of heat treatment in enhancing the corrosion resistance of Al 2014 alloy, suggesting that specific processes can improve the alloy’s durability in corrosive environments, leading to extended lifespan and reduced maintenance costs.