AFM parameters of low-carbon steel in the blank solution in the absence and presence of 300 ppm of the DMIH compound at 298 K.

Substance	S a (μm)	S q (μm)	S p (μm)	S v (μm)	S z (μm)
Control	0.045	0.062	0.234	0.436	0.670
0.5 mol L−1 HCl	0.254	0.351	6.04	3.56	9.60
DMIH	0.066	0.114	0.488	1.43	1.91