Table 5. PDP variables for mild steel submerged in 1 M HCl using varying amounts of DMF terpolymer.

Conc. (ppm)	β a (mV dec−1)	β c (mV dec−1)	E corr (mV (SCE))	I corr (μA cm−2)	IE (%)
Blank	64	106.1	−396	451	—
20	62.1	107.5	−404	228.1	49.42
40	64	106.4	−403	154.4	65.76
60	70.6	111.1	−415	119.2	73.57
80	109	126	−416	69.8	84.52
100	121	136	−422	30.5	93.24
120	115	125	−420	26.6	94.10