Coatings based on self-assembling molecules (SAM) have been studied as possible substitutes to the chromate conversion coatings for corrosion protection of aluminium alloys. In this work, the influence of alkane diphosphonates self-assembling molecules on the corrosion resistance of the AA2024-T3 aluminium alloy is investigated. The corrosion investigation is carried out by electrochemical impedance spectroscopy, potentiodynamic polarization techniques, accelerated corrosion experiments and scanning electron microscopy technique. Results show that the surface treatment with self-assembling molecules decreased the corrosion resistance of the alloy due to the corrosive attack of the SAM solution to the alloy surface. The solution used for passivation with chromium (VI) also caused the attack of the alloy surface, leading to slight decreases in the corrosion resistance. The surface treatment that produced the best corrosion resistance is associated with the growth and sealing of the surface oxide.