Aluminum Science and Technology
Etching of Aluminum and Its Alloys
Etching aluminum can be a pretreatment step for anodizing, chemical conversion coating, metal-to-rubber bonding, and a host of other processes. Chemical etching, using either alkaline or acid solutions, produces a matte finish on aluminum products. This article describes the alkaline etching and acid etching of aluminum. Alkaline etching reduces or eliminates surface scratches, nicks, extrusion die lines, and other imperfections. Acid etching can be done without heavy smut problems, particularly on aluminum die castings. Hydrochloric, hydrofluoric, nitric, phosphoric, chromic, and sulfuric acids are used in acid etching. The article presents a flow chart of the operations used in acid etching.
Linda Newman, Etching of Aluminum and Its Alloys, Aluminum Science and Technology, Vol 2A, ASM Handbook, Edited By Kevin Anderson, John Weritz, J. Gilbert Kaufman, ASM International, 2018, p 586–589, https://doi.org/10.31399/asm.hb.v02a.a0006489
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New Handbook: Volume 11B
Now available in the Digital Library! Volume 11B serves as a reference and guide to help engineers determine the causes of failure in plastic components and make corrective adjustments through design and manufacturing modifications.