Effects of pre-anodizing and phosphates on energy consumption and corrosion performance of PEO coatings on AA6082
Effects of pre-anodizing and phosphates on energy consumption and corrosion performance of PEO coatings on AA6082
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DOI：
10.1016/j.surfcoat.2021.126892
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发表时间：
2021-02-01
影响因子：
5.4
通讯作者：
Arrabal, R.
中科院分区：
文献类型：
--
作者：
Mohedano, M.;Mingo, B.;Arrabal, R.
采用基于电解液选择和前体阳极膜的策略，在AA 6082合金上获得了显著降低能量消耗的等离子体电解氧化（PEO）涂层。在具有不同磷酸盐种类的硅酸盐基电解质中，在AA 6082上开发PEO涂层，不具有和具有前体氧化物层。的电响应，因此，特定的能量消耗取决于磷酸盐的物种，最显着的应用预处理。最好的结果是在阳极预处理和PEO在硅酸盐-聚磷酸盐电解质中与最常规的处理（直接PEO在正磷酸盐电解质中）相比，减少高达66%。无论是短时间还是长时间的浸泡时间，腐蚀响应都不会受到预阳极化处理的显著影响，这表明在高能效条件下合成的涂层在侵蚀性腐蚀环境下具有与传统PEO工艺相当的腐蚀性能。
A significant reduction in the energy consumption of Plasma Electrolytic Oxidation (PEO) coatings on AA6082 alloy was obtained using strategies based on electrolyte selection and a precursor anodic film. PEO coatings were developed on AA6082 in silicate-based electrolytes with different phosphate species without and with a precursor oxide layer. The electrical response and, therefore, the specific energy consumption depended on the phosphate species and most notably on the applied pretreatment. The best result was obtained after anodic pretreatment and PEO in silicate-polyphosphate electrolyte with a reduction up to similar to 66% in comparison with the most conventional treatment (direct PEO in orthophosphate electrolyte). The corrosion response is not affected significantly by the pre-anodizing treatment either for short or prolonged immersion times revealing that coatings synthesised under high-energy efficient conditions have comparable corrosion performance under aggressive corrosive environments compared to conventional PEO processes.