This Aerospace Recommended Practice (ARP) describes the processing system and techniques for the surface preparation and priming of aluminum alloy parts for structural adhesive bonding to achieve optimum bondline durability@ corrosion resistance@ and manufacturing producibility. While this surface preparation has been developed and validated for two high strength aluminum alloys@ 2024 and 7075@ in the hardened condition it is expected to be applicable to other alloys and tempers. This surface preparation system has been validated for use with 180??(82?? and with 250??(121?? curing elastomer-modified epoxy adhesive and corrosion-inhibiting primer. The processes described herein are the result of laboratory evaluation of structural and durability performance. Safety - Hazardous Materials: While the materials@ methods@ applications@ and prcesses described or referenced in this specification may involve the use of hazardous materials@ this specification does not address the hazards which may be involved in such use. It is the sole responsibility of the user to ensure familiarity with the safe and proper use of any hazardous materials and to take necessary precautionary measures to ensure the health and safety of all personnel involved.