Lead-Silver Anode Degradation during Zinc Electrorecovery Process: Chloride Effect and Localized Damage

Table 1

Corrosion rate (CR) of the lead/silver, measured gravimetrically in zinc electrowinning solutions containing different chloride concentrations (𝑡=72 hr, 𝑖=500 Am⁻², and 𝑇=40°C).

(Cl)/ppm	CR (gr·m^−2h^−1)	Impurity of lead in the cathode’s product (%)^a
130	2.80	0.1407
175	3.06	0.1666
280	2.92	0.1285
380	2.32	0.1155

aObtained from atomic absorption experiments (see Section 2).