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Flash-PEO as an alternative to chromate conversion coatings for corrosion protection of Mg alloy

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https://doi.org/10.1016/j.corsci.2020.109189
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2020-11-14
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In the present work, a flash-PEO coating is developed on AZ31B alloy in a combination of silicate, phosphate, and fluoride based electrolyte in order to offer a green alternative to chromate conversion coatings. Multilevel active protection is achieved through synergetic combination of self-sealing effect of PEO coating itself and active inhibition provided by an organic inhibitor impregnated in PEO pores in a post-treatment step. The results indicate that flash-PEO coatings, loaded with organic corrosion inhibitors, can be recommended for exploitation on industrial level as an equally effective corrosion protection system alternative to CCC for paint-bearing and paint-free applications.
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Ingeniería química , Materiales
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3303 Ingeniería y Tecnología Químicas , 3312 Tecnología de Materiales
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