Summary of Zinc Anode 620 The Zinc Anode 620 is a specialized sacrificial galvanic anode designed for cathodic protection, primarily used to prevent corrosion of buried or submerged metal structures. 🛠️ Key Technical Specifications
Based on standard industrial datasheets, the 620 series typically adheres to the following profiles:
Material Composition: High-purity zinc alloy (often ASTM B418 Type II for soil or Type I for saltwater).
Open Circuit Potential: Approximately -1.10 Volts relative to a Cu/CuSO4 reference electrode.
Capacity: Theoretical current capacity of ~820 Ah/kg (372 Ah/lb). Efficiency: Typically ranges from 90% to 95%. 📦 Packaging & Installation
These anodes are often "pre-packaged" to ensure consistent performance in high-resistance soils:
Backfill Mixture: Usually a 50/50 mix of Gypsum and Bentonite. zinc anode 620 datasheet
Purpose: The backfill lowers contact resistance and moisture retention around the anode.
Connection: Supplied with a standard lead wire (e.g., 10ft of #12 AWG THHN/THWN) for connection to the structure. 🌊 Primary Applications
Underground Pipelines: Protecting coated steel pipes from soil corrosivity.
Storage Tanks: Corrosion prevention for the external bottoms of grounded tanks.
Marine Environments: Ideal for structures in saltwater or brackish water where aluminum or magnesium might over-protect.
Grounding: Often used as earthing electrodes to mitigate AC interference. 🛡️ Why Zinc? Summary of Zinc Anode 620 The Zinc Anode
Zinc is chosen over magnesium in specific scenarios because it has a lower driving voltage. This prevents "over-protection," which can lead to hydrogen embrittlement or coating disbondment on certain high-strength steels.
is a two-component, high-solids epoxy primer. It provides "galvanic protection" by acting as a sacrificial layer; if the coating is scratched, the high concentration of zinc dust corrodes instead of the underlying steel.
Key Composition: Contains over 80% zinc by weight in the dry film.
Compliance: Meets British standard BS 4652 and performance requirements for BS 5493.
Industrial Use: Commonly used on offshore structures, petrochemical plants, pipelines, and bridges. Technical Data & Specifications
The following technical metrics are standard for the Zincanode 620 Datasheet: Specification Volume Solids Typical Dry Film Thickness (DFT) 75 microns Theoretical Coverage m2m squared /litre @ 75 microns DFT Finish & Color Matt, Metallic Grey Mixing Ratio 3 parts Base : 1 part Hardener (by volume) Heat Resistance Up to 150°C (Dry heat) Application Guidelines The Energizer EN95 / NEDA 620 Battery: A standard 1
Surface Preparation: Requires abrasive blast cleaning to a minimum standard of Sa 2.5 (ISO 8501-1:1988) with a surface profile between 50 and 75 microns.
Method: Best applied via airless spray (Tip size: 0.43–0.53 mm). Brushes or rollers are generally reserved for touch-ups or small areas. Drying Times (at 25°C): Touch Dry: 20 minutes. Hard Dry: 6 hours. Pot Life: 8 hours. Sacrificial Anode Alternative: Model 620
While "620" is primarily a coating brand, some maritime suppliers use similar numbering for solid anodes. For example:
Marine Pencil Anodes: Some Bukh engine pencil anodes use part numbers like 2-62050 for small engine-cooling protection.
Dimensions: Large hull anodes, such as the NAL 8 model, can have lengths of 620mm and weigh approximately 8kg. Go to product viewer dialog for this item. Zinc Pencil Anode
Below is a datasheet breakdown for the most likely candidate: the Energizer Industrial 620 (EN95) Zinc Battery, along with technical details on Zinc Anode composition in general.
Research Paper Context: If your paper focuses on Zinc-Ion or Zinc-Air batteries, the "620" might refer to a specific particle size or surface area specification. In modern battery research, the key challenges with Zinc anodes are:
Some suppliers stock a 620g pendant anode: