Due to European REACh regulation hexavalent chromium-based substances must be removed from surface treatments to improve environmental sustainability and workers safety. Thin Film Sulfuric Acid Anodizing sealed with a 3-steps process was identified to be a suitable Cr VI-free alternative to Chromic Acid Anodizing sealed in hot water. The TFSAA was tested in accordance with MIL-PRF-8625 and EN4827 and it shall have no regression if compared to CAA. The tests included visual inspection, paint adhesion, coating weight, and thickness. Corrosion resistance was assessed using salt fog, intergranular attack, and end grain pitting tests. The mechanical properties were examined through static tensile tests, low and high cycle fatigue tests.