This is the core of the zinc anode 620 datasheet. Do not purchase an anode without these values.
| Parameter | Value | Test Standard | |----------------------------|--------------------------------|---------------------| | Open Circuit Potential | -1.030 V (vs. Ag/AgCl/Seawater)| ASTM G97 | | Closed Circuit Potential| -0.980 V to -1.010 V (vs. Ag/AgCl) | ASTM G97 | | Effective Current Capacity | 780 A·hr/kg (minimum) | NACE TM0190 | | Actual Consumption Rate | 11.8 kg/A·year | Theoretical | | Anode Efficiency | 95% (Minimum) | NACE TM0190 | | Driving Voltage (vs Steel)| 0.25 V (Seawater) | N/A |
| Parameter | Value | |-----------|-------| | Model | 620 | | Material | High-purity zinc alloy (per MIL-DTL-18001 / ASTM B418 Type I) | | Weight | 0.62 kg (approx.) | | Dimensions (L × W × H) | 150 × 70 × 25 mm (typical – confirm with manufacturer) | | Mounting Type | Bolt-on or welded stud | | Current Capacity | ~780 A·h/kg | | Potential (vs. Ag/AgCl) | -1.05 V to -1.10 V | | Efficiency | ≥ 90% | zinc anode 620 datasheet
Inspect Type 620 anodes every 6 months. Replacement is required when the remaining mass is less than 15% of original or the steel core is exposed.
| Condition | Cause | Remedy | | :--- | :--- | :--- | | White, hard crust | Passivation (Low Chloride/Fresh water) | Switch to Magnesium anode | | Soft, mushy sludge | Over-protection (Too many anodes) | Reduce anode count by 50% | | Uneven, pitted wear | Poor electrical contact | Re-weld core connections | | Oily surface | Hydrocarbon contamination | Clean with solvent; Do not sandblast | This is the core of the zinc anode 620 datasheet
A poor weld ruins a perfect anode. Follow this datasheet protocol:
The "Zinc Anode 620" is not a universal anode. Its shape (long and low profile) is designed for: Inspect Type 620 anodes every 6 months
The "620" typically denotes the net weight (0.62 kg or 1.37 lbs) of zinc, though some industrial suppliers use the code for a 620 cu. cm volume. The most common commercial variant used in North America and Europe is the Hull Mount 620:
The term "620" typically denotes a Hull or Brace Anode weighing approximately 6.2 kg (13.66 lbs) or measuring roughly 620 mm in length depending on the manufacturer's code. However, the industry standard for the “620” profile most commonly refers to a trapezoidal or rectangular bar anode used predominantly on ship hulls, heat exchangers, and water box applications.
Standard Dimensions (Typical for 620 Profile):
Note: Always verify manufacturer drawings, as "620" may refer to length in millimeters for custom extrusions.
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