Zinc Anode 620 Datasheet Updated Jun 2026

: Approximately -1.10 Volts relative to a Cu/CuSO4 reference electrode.

Note: Zinc-Carbon anodes degrade faster under heavy load than Alkaline anodes. zinc anode 620 datasheet

The "620" designation typically refers to a specific weight or size class in the marine industry, often weighing approximately 10–12 lbs (4.5–5.5 kg) depending on the specific manufacturer (e.g., Martyr, Camp, or Tecnoseal). Physical Dimensions (Standard) 12 inches (305 mm) Width: 3 inches (76 mm) Thickness: 1.25 inches (32 mm) Bolt Centers: 6 inches (152 mm) — Common for "620" series Weight: ~11.5 lbs (Zinc alloy) Chemical Composition : Approximately -1

The is a precision-engineered sacrificial anode designed primarily for cathodic protection in saltwater and brackish environments . Adhering to military specification MIL-DTL-18001L (or commercial equivalents), the Type 620 is most commonly recognized as a hull-mounted or side-frame anode for vessels ranging from tugboats to offshore supply vessels. Physical Dimensions (Standard) 12 inches (305 mm) Width:

To ensure active potential and prevent passivation, the Type 620 alloy must contain specific trace elements. Impurities like iron and copper are strictly limited to prevent the formation of a passive oxide film.