Improvement of corrosion resistance of friction stir welded aluminum alloys is of great importance for aerospace applications. The paper presents first results about Low Pressure Cold Spray (LPCS) of Al based coatings for corrosion protection.  The corrosion protection provided by these coatings was evaluated by electrochemical measurements (polarization curves, electrochemical impedance spectroscopy) in 1M NaCl electrolyte. The microstructures and electrochemical behavior of the Al based coatings were investigated and compared with pure Al coating. The electrochemical corrosion mechanisms of the coatings and microstructure were discussed.The results reveal the corrosion resistance of friction stir welded aluminum alloys can be substantially improved by applying Al-based coatings made with LPCS.