Sepiolite reinforced PEO layer on AZ 31

Schneider, Michael; Kremmer, K.; Fürbeth, W.; Lederer, S.; Sottor, R.

doi:10.1016/j.surfcoat.2023.129369

Cited by 2 publications

(2 citation statements)

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“…In general, the voltage values of the tests in electrolytes with sepiolite were higher than those in sepiolite-free electrolytes. This result corresponds to the considerations made in [53]. The morphology of the PEO layers is presented in Figure 7 by selected surface and cross-sectional SEM micrographs.…”

Section: Plasma Electrolytic Oxidationsupporting

confidence: 85%

See 1 more Smart Citation

Plasma Electrolytic Oxidation on Magnesium AZ31 with Sepiolite as Inhibitor Carrier for Improved Corrosion Protection

Sottor,

Gruen,

Kremmer

et al. 2023

CMD

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Plasma electrolytic oxidation (PEO) in an alkaline silicate electrolyte containing nanosized sepiolite fibers was carried out on magnesium alloy AZ31. The mineral fibers were loaded with different corrosion inhibitors and incorporated in situ during the PEO treatment. The composition and microstructure of the PEO coatings were investigated by SEM. It was shown that the fibers are located on the surface as well as inside the “weak spots” of the coating, i.e., pores and discharge channels. The fixation of the particles is caused by sintering due to the heat developed during the PEO treatment. Investigations using electrochemical impedance spectroscopy and linear sweep voltammetry in 0.01 M NaCl solution confirmed an improvement of the corrosion protection. The use of the inhibitors shifts the critical pitting potential in the anodic direction. Regarding efficiency, cerium-loaded sepiolite showed the best behavior by shifting the pitting potential by +0.9 V.

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Section: Plasma Electrolytic Oxidationsupporting

confidence: 85%

“…This applies to both open and closed pores. The analysis of the incorporation mechanism and evidence of incorporated sepiolite by EDX analysis was already published by Schneider et al [53].…”

Section: Plasma Electrolytic Oxidationmentioning

confidence: 99%