Synthesis and Characterization of Poly(urethane-ether azomethine) Fatty Amide Based Corrosion Resistant Coatings from Pongamia glabra Oil: An Eco-Friendly Approach

Table 2

Corrosion parameter for PUEAF coated and bare MS in different corrosive media.

Resin code	Medium	(mV)	mV/dec	mV/dec	(mA/cm^2)	Corrosion rate (mm/y)	LPR (); KOhm·cm^2
MS	Tap water	−478.89	19.894	37.354			0.0788
PUEAF20	Tap water	−323.13	44.111	49.314			19.412
PUEAF25	Tap water	−219.65	34.356	28.050			34.963
PUEAF30	Tap water	−168.25	41.370	40.320			67.512
MS	5.0% NaCl	−535.78	18.287	31.920			00.035
PUEAF20	5.0% NaCl	−430.28	30.045	30.023			03.039
PUEAF25	5.0% NaCl	−422.85	29.029	26.596			22.743
PUEAF30	5.0% NaCl	−370.79	19.809	26.108			116.59
MS	3.5% HCl	−432.80	36.334	59.161			00.010
PUEAF20	3.5% HCl	−512.70	39.124	63.157			00.465
PUEAF25	3.5% HCl	−460.91	83.472	85.546			03.020
PUEAF30	3.5% HCl	−325.06	15.634	25.544			81.561