(a)
(b)
(c)
(d)
Figure 10: (a) Influence of abrasion length on contact angle of MgAl-LB-24 h. (b) SEM image of MgAl-LB-24 h after sliding 210 cm. (c, d) EDX mapping of the MgAl-LB-24 h after abrasion based on a mapping model (b) investigation.