The electrochemical performance of the 620 zinc anode determines how long it will last and how effectively it will protect adjacent metals like steel, bronze, and aluminum.
80 - 120 Microns per coat.
Good (Aluminum may be preferred for low-salinity).
-1.05 V vs. Ag/AgCl reference electrode
It is often paired with high-build epoxy or polyurethane topcoats for a complete protective system. Documentation: Always review the latest Safety Data Sheet (SDS) zinc anode 620 datasheet
Galvanized steel strap (straight or cranked) for welding, or pre-slotted holes for bolt-on applications. Nominal Bolt Centers: 200 mm (for bolt-on variants). 4. Electrochemical Characteristics
In the industrial cathodic protection market, the "620" designation is not a monolithic standard but is most prominently used by for components in their ZE Series seawater cooling anodes. Within this series, "620" most frequently refers to the Iron Foot Size (in mm) of several models, specifically the ZE-1 and ZE-4 .
The Zinc Anode 620 has the following performance characteristics:
Recommended for airless spray application on abrasive blast-cleaned steel (Sa 2.5 standard). 2. SeaZinc SRT-1 / SRT-3 Strip Anodes (Sacrificial) The electrochemical performance of the 620 zinc anode
Zincanode 620 is the industry standard for protecting heavy-duty steel assets, including:
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The compact yet high-mass profile of the 620 zinc anode makes it highly versatile. It is primarily deployed in the following environments:
To ensure high current output and prevent passivating film buildup, the Zinc Anode 620 is manufactured to strict military or international standards, most notably (or ASTM B418 Type I). Weight Percentage (%) Purpose / Effect Zinc (Zn) Remainder (Min 99.31%) Primary active material Aluminum (Al) 0.10% – 0.50% Promotes uniform, non-passivating corrosion Cadmium (Cd) 0.025% – 0.07% Prevents the formation of an adherent oxide layer Iron (Fe) 0.005% Max Strict limit; excess iron causes passivation Lead (Pb) 0.006% Max Impurity control Copper (Cu) 0.005% Max Impurity control 3. Physical and Mechanical Dimensions Nominal Bolt Centers: 200 mm (for bolt-on variants)
This comprehensive technical reference covers the specifications, electrochemical properties, and installation guidelines for the 620 zinc anode. 1. Material Composition and Chemistry
Suitable for ISO 12944 C5 environments (highly corrosive). Temperature Resistance: Withstands dry heat up to Technical Specifications: Volume Solids: Dry Film Thickness (DFT): Typical 75 microns. Theoretical Coverage: Approximately at 75 microns DFT. Mixing Ratio: 3 parts Base to 1 part Hardener by volume.
Never paint the zinc anode. Coating the anode seals the surface and prevents electrical current from flowing. Maintenance and Replacement Inspect anodes during routine dry-docking or dive surveys.