Energy-efficient PEO process of aluminium alloys

E. Matykina, R. Arrabal, A. Pardo, M. Mohedano, B. Mingo, I. Rodríguez, J. González

    Research output: Contribution to journalArticlepeer-review


    The influence of pre-anodising in sulphuric and phosphoric acids on energy efficiency of voltage-controlled PEO process of three commercial wrought and cast aluminium alloys (AA1050, AA6082 and A356) has been investigated. The precursor anodic porous films enable up to 57% energy savings during PEO and produce ∼35-40% increase of the coating microhardness compared with direct PEO. Total specific energy consumption values of 2.5-2.7 kW h m-2 μm-1 and 3.1-3.8 kW h m-2 μm-1 were achieved using phosphoric and sulphuric acid-formed precursors, respectively.

    Original languageEnglish
    Pages (from-to)13-16
    Number of pages4
    JournalMaterials Letters
    Publication statusPublished - 15 Jul 2014


    • Metals and alloys
    • Oxidation
    • Thick films


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