Alkaline Electrolytic Polishing Process for Aluminum A series of alkaline polishing solution systems were studied, and the influences of corrosion inhibitors and viscosity modifiers on polishing performance were compared. An alkaline solution system with excellent polishing effect was successfully developed. New additives were innovatively formulated to lower the operating temperature, extend the service life of the solution and further optimize the polishing quality. Experimental results prove that desirable polishing performance can be achieved by adding appropriate additives into sodium hydroxide (NaOH) solution. Preliminary tests found that aluminum surfaces can reach a reflectivity of 90% after direct-current (DC) constant-voltage electrolytic polishing in glucose-containing NaOH solution under specific conditions. However, the process still suffers from instability and requires further optimization. The feasibility of DC pulse electrolytic polishing for aluminum in alkaline media was also explored. It is verified that pulse electrolytic polishing can achieve the same leveling effect as DC constant-voltage polishing, albeit with a relatively slower leveling rate.