Inhibition of Corrosion of Carbon Steel in Well Water by DL-Phenylalanine-Zn²⁺ System

Table 5

Corrosion parameters of carbon steel immersed in well water in the absence and presence of inhibitor system obtained from potentiodynamic polarization study (pH = 8).

System	𝐸corr; mV versus SCE	𝑏𝑐; mV/decade	𝑏𝑎; mV/decade	𝐼corr; A/cm^2	LPR; ohm cm^2
Well water	−668	268	104	5.775 × 10^−7	5.630 × 10^4
Well water + DL-Phe (150 ppm) + Zn^2+ (5 ppm)	−658	242	151	4.993 × 10^−7	8.075 × 10^4