Corrigendum: Nonlinear Oxidation Behavior in Pure Ni and Ni-Containing Entropic Alloys - Xia, Songqin; Lousada, Cláudio M.; Mao, Huahai; Maier, Annika C.; Korzhavyi, Pavel A.; Sandström, Rolf; Wang, Yugang; Zhang, Yong (Frontiers in Materials, 2018)