Sacrificial Anode Set Magnesium Anode 22kg | Cathodic Protection Material 14kg Magnesium Anode Price

I. Product Overview

The 22kg magnesium anode set is a sacrificial anode corrosion protection system specifically designed for buried metal structures (such as pipelines and storage tanks). It is made of high-purity magnesium alloy (ASTM B843 standard, Mg≥99.9%). Each set includes the anode body, cable, and specialized backfill material, with a total weight of 22kg±5%. Its driving voltage reaches -1.7V (vs CSE), current efficiency >50%, and theoretical service life can be 10-15 years (when soil resistivity ≤30Ω·m).

II. Core Parameters

1. Electrochemical Performance

   • Open Circuit Potential: -1.75V ~ -1.60V (saturated copper electrode)

   • Theoretical Electrical Output: 2200Ah/kg (2.2 times that of zinc anodes)

   • Suitable Environment: Moist or low-to-medium salinity environments with soil resistivity <100Ω·m

2. Physical Characteristics

   • Anode Dimensions: Typically rod-shaped, Φ150×750mm, with a pre-embedded 6mm2 cross-sectional copper core cable

   • Backfill Material Composition: 75% gypsum powder + 20% bentonite + 5% sodium, reducing grounding resistance to below 1.5Ω

III. Typical Application Scenarios

• Urban Gas Pipeline Networks: Install one set every 200-300 meters to protect damaged points of 3PE anti-corrosion coating

• Oil Field Storage Tank Bases: Arrange 0.5 sets per 10㎡ to defend against stray current corrosion in soil

• Offshore Platform Pile Legs: Use aluminum alloy anodes for underwater sections and magnesium anodes for tidal zones

IV. Installation Specifications

1. Pre-treatment: Remove asphalt coating from the pipeline surface, expose the metal substrate, and polish to St3 cleanliness level

2. Welding and Fixation: Permanently connect the anode cable to the pipeline using thermite welding, with joint insulation resistance >1MΩ

3. Backfill Construction: Vertically bury the anode 1.5m from the side of the pipeline, with backfill material thickness ≥300mm and backfill soil compaction >90%

V. Maintenance and Inspection

• Measure pipe-to-soil potential annually (should be ≤-0.85V CSE)

• Replace when output current drops below 5mA or remaining mass <15%

(Attached: Performance Comparison Table of 22kg Magnesium Anode and Similar Products)