Magnesium Sacrificial Anode for Cathodic Protection

Specifications

Types

Standard (grades AZ63B/H1A, AZ63C/H1B, AZ63D/H1C) and high potential (M1C)

Nominal Potential

Standard −1.5 V and high potential −1.75 V (CSE, Cu/CuSO₄)

Capacity & Efficiency

Capacity 1100 Ah/kg; efficiency 0.5 (50%)

Composition (standard type)

Mn 0.15–0.7%; Al 5–7%; Zn 2–4%; Fe max 0.005%; Cu max 0.08%; Si max 0.3%; Pb max 0.03%; Ni max 0.003%; Mg remainder

Composition (high-potential type)

Mn 0.5–1.5%; Al max 0.05%; Zn max 0.03%; Fe max 0.03%; Cu max 0.02%; Si max 0.05%; Mg remainder

Shapes

Trapezoidal (cube) and disc; dimensions A–E and weight per order

Backfill

Gypsum 75%, Bentonite 20%, Sodium Sulfate 5%

Application Limits

Soil use with backfill; soil resistivity max 100 Ω·m unless confirmed by engineering evaluation

Tests

Chemical analysis and electrochemical testing of each casting; mechanical strength; maximum core-to-cable electrical resistance of 0.01 ohm.

Tolerances

Length and width ±3%; straightness max 2% of length; weight ±5%

Standards

IPS-M-TP-750 – ASTM B843