خواص بهداشتی بادوام ss304
An in-depth study of photocathodic protection of SS304 steel … Fig. 2 shows the SEM images of the as-prepared ZnO films deposited at different stages on SS304 under constant potentials of −0.7(a 1-a 4), −1.0 (b 1-b 4) and − 1.6 V (c 1-c 4), …