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Degradation performance of both PEO-coated and non-coated Mg-Ca-Zn alloys. (A) The residual volumes of the PEO-coated alloys were significantly larger than those of the non-coated alloys at every time point. The initial Mg alloy volume was 44.87 mm3. Note the asterisk (*) indicates that the p-value was under 0.05. (B) The void volumes of PEO-coated alloys were smaller than those of non-coated alloys at every time point. Note the asterisk (*) indicates that the p-value was under 0.05.
