Abstract
The use of polarization data in the measurement of instantaneous corrosion rates is described. Steel and cast iron specimens were tested in 3000 ohm-cm waters; potentials were measured by a multicom-bination meter.
Potential-time studies were made on all specimens in order to determine any relationship which such studies might have to the corrosion rate. It was found that a limited empirical quantitative relationship exists between the polarization slope, ΔE/ΔI, at low current density and the corrosion rate as measured by weight loss. Such a relationship will permit a rapid empirical determination of the corrosion rates of metal specimens while they are immersed in a fresh-water environment.
The effect of pH on the corrosion rate of mild steel is considered briefly. 2.3.5
