Research Article

Effect of Caffeine-Zn2+ System in Preventing Corrosion of Carbon Steel in Well Water

Table 5

Influence of duration of immersion on IE of caffeine (200 ppm)-Zn2+ (50 ppm), malic acid (25 ppm).

SystemImmersion period (days)CR (mdd) IE (%)
Presence of inhibitorAbsence of inhibitor

Caffeine (200 ppm)-Zn2+ (50 ppm), malic acid (25 ppm).11.0220.4095
32.4722.4289
549.6268.9228
775.5093.2119