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

Table 6

Corrosion parameters of carbon steel immersed in well water in the absence and presence of inhibitor system obtained from AC impedance spectra (pH = 8).

System	Nyquist plot		Bode plot
	𝑅𝑡; ohm cm^2	𝐶dl; F/cm^2	Impedance value; log(z/ohm)
Well water	1212	3.8424 × 10^−9	3.120
Well water + DL-Phe (150 ppm) + Zn^2+ (5 ppm)	12711	4.0083 × 10^−10	4.181