MMO (Mixed Metal Oxide) Anode for Cathodic Protection

Specifications

Base Material

Titanium Grade 1 & 2

Anode Types

Tubular, rod, wire and ribbon

Environments

Soil, coke backfill, fresh water, brackish water, seawater, concrete and fine sand (ribbon)

Tubular Dimensions

Dia × length: 25×500, 25×1000, 32×1200 and 32×1500 mm

Rod Dimensions

Dia 3.175, 6.35, 12.7 and 19 mm; length per order

Wire Dimensions

Dia 1.5 and 3 mm

Ribbon Dimensions

Width × thickness: 6.35×0.635 and 12.7×0.5-0.6 mm

Current Density (tubular & rod)

Soil 100; carbonaceous backfill 50; petroleum backfill 100; fresh water 100; brackish 100–300; seawater 600 (A/m²)

Rod Output per Meter

Fresh water 100; brackish water 300; seawater 600 (amperes per square meter)

Wire Specifications

Internal resistance 0.136 (dia 1.5) and 0.068 (dia 3) ohm/m; output in calcined petroleum coke or fresh water 0.5 and 1 A/m

Ribbon Output

Width 6.35 / 12.7: concrete 3.15 / 6.3; fine sand 42 / 76.2 (mA/m)

Design Life

20 to 25 years (subject to the applicant's request)

Standards

ASTM B265 – NACE TM0108 – IGS-M-TP-022

Tests

Coating uniformity min 85%; adhesion pull-off above 50 MPa; ISO 19097 accelerated life test; helium moisture-seal test at 2 atm, no leakage (tubular); connection resistance below 0.001 ohm (tubular)