A　superhydrophobic　surface　on　AA3003　with　a　structure　consisting　of　microrods　and　nanosheets　was　fabricated　via　a　chemical　etching　approach　combined　with　modification　by　stearic　acid　alcohol　solution.　Etching　time,　temperature　and　concentration　were　adjusted　to　optimize　surface　topographies　and　wettability.　The　optimized　surface　exhibited　a　static　contact　angle　of　similar　to　167　degrees　and　a　sliding　angle　of　similar　to　1　degrees.　The　surface　structure　consisting　of　microrods　and　nanosheets　was　responsible　for　the　superhydrophobicity,　the　formation　mechanism　of　which　was　discussed　in　detail.　The　morphology　of　the　Al　alloy　surface　after　deep　etching　indicated　that　the　intermetallic　phases　had　a　strong　pinning　effect,　providing　reinforced　skeletons　for　the　superhydrophobic　surface.　The　upright　nanosheets　trapped　air,　inducing　excellent　superhydrophobicity.　Mn　oxide　was　formed　on　the　surface　after　the　etching　treatment,　which　caused　a　brown　coloration.　This　process　provides　an　environment-friendly　and　low-cost　strategy　to　fabricate　durable　and　corrosion-resistant　superhydrophobic　surfaces　on　large-scale　substrates,　which　could　potentially　be　used　in　various　indoor　applications.