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

Table 2

Corrosion rates (CRs) of carbon steel immersed in well water in the presence and absence of inhibitor system at various concentrations and the inhibition efficiencies (IEs) obtained by weight loss method.

DL-Phe ppm	Zn^2+ ppm	CR mm/y	IE %
0	0	0.0874	—
50	0	0.0515	41
100	0	0.0550	37
150	0	0.0585	33
200	0	0.0629	28
250	0	0.0664	24

Inhibitor system: DL-phenylalanine-Zn²⁺ (0 ppm), immersion period: 7 days, pH = 8.