Technical Overview of the 620 Zinc Anode: Specifications, Applications, and Performance

is a powerhouse in this category, specifically designed to take the hit so your infrastructure doesn't have to. What is a Zinc 620 Anode?

To perform effectively as a sacrificial material, zinc must meet strict metallurgical standards. Most industrial 620 anodes are manufactured to conform to (Military Specification) or ASTM B418 Type I standards for marine environments. Weight Percentage (MIL-A-18001K) Purpose / Effect Zinc (Zn) Remainder (approx. 99%+) Base sacrificial metal Aluminum (Al) 0.10% – 0.50% Promotes uniform dissolution Cadmium (Cd) 0.025% – 0.07% Prevents passive film formation Iron (Fe) 0.005% max Controlled strictly; causes passivation if too high Lead (Pb) 0.006% max Impurity limit Copper (Cu) 0.005% max Impurity limit 2. Physical Dimensions and Weight

Weld-on projection tabs or bolt-on pre-slotted inserts. Core Dimensions: Typically 30 mm x 6 mm extended flat bar. 5. Installation and Maintenance Best Practices Welding Requirements Clean the steel structure surface to a bright metal finish. Position the anode core tabs flat against the structure.

The anode must have a direct metallic connection to the structure it is protecting.

Note: Exact physical configurations (weld-on vs. bolt-on) can vary by foundry, but standard "620" series dimensions generally align with the following metrics:

-1.05 V vs. Ag/AgCl reference electrode.