Erratum: Substrate Purity Effect on the Defect Formation and Properties of Amorphous Anodic Barrier Al2O3 [J. Electrochem. Soc., 165, C422 (2018)]. Issue 9 (12th June 2018) - González-Castaño, Miriam; Döbeli, Max; Araullo-Peters, Vicente; Jeurgens, Lars P. H.; Schmutz, Patrik; Cancellieri, Claudia