Inhibition Behaviour of Some Isonicotinic Acid Hydrazides on the Corrosion of Mild Steel in Hydrochloric Acid Solution

Figure 13

SEM images of (a) polished MS surface, (b) MS in 0.5 M HCl, (c) MS in 500 ppm INIMH, and (d) MS in INPMH.

(a)

(b)

(c)

(d)