MMO Titanium Ribbon Anode Cathodic Protection
MMO Ribbon: Base titanium: ASTM B863 Gr1; Size: 6.35*0.635mm Coil length: 152m/coil
Product Introduction
The MMO (Mixed Metal Oxide) Titanium Ribbon Anode is a high-performance anode used in Impressed Current Cathodic Protection (ICCP) systems. It consists of a titanium substrate (ASTM B265 Grade 1) coated with a catalytic layer of iridium–tantalum oxides (IrO₂/Ta₂O₅).
Also known as:
DSA (Dimensionally Stable Anode)
PMTA (Precious Metal Coated Titanium Anode)
OCTA (Oxide Coated Titanium Anode)
This type of anode provides excellent electrocatalytic activity, high conductivity, and long-term stability in harsh environments.
Cathodic Protection Principle
Cathodic protection is an electrochemical technique used to prevent metal corrosion. By applying an external DC current:
The protected structure becomes the cathode
Oxidation (corrosion) reactions are suppressed
Metal deterioration is significantly reduced or eliminated
Types of Cathodic Protection
Impressed Current Cathodic Protection (ICCP) – uses external power and inert anodes (such as MMO titanium)
Sacrificial Anode Protection – uses more reactive metals (e.g., zinc, aluminum)
Product Specifications
MMO Ribbon Anode & Titanium Conductor
Item | MMO Ribbon | Titanium Conductor Bar |
Size (mm) | 6.35 × 0.635 | 12.7 × 0.9 |
Coil Length (m) | 152 | 152 |
Coil Weight (kg) | 2.8 | 7.8 |
Output Current (mA/m) | 17 / 42 | - |
Design Life (years) | 50 | 50 |
Material Properties (Titanium Substrate – ASTM B265 Gr1)
Element | Fe | C | N | H | O | Ti | Others |
Max Content (%) | 0.20 | 0.08 | 0.03 | 0.015 | 0.18 | ≥99 | 0.4 |
Thermal Expansion Coefficient: 8.7 × 10⁻⁶ /K (20°C)
Thermal Conductivity: 15.6 W/(m·K)
Electrical Resistivity: 0.56 × 10⁻⁶ Ω·m
Coating System
Type: Iridium–Tantalum Oxide (IrO₂/Ta₂O₅)
Provides:
High corrosion resistance
Low consumption rate
Stable electrochemical performance
Accelerated Life Test
Standard: NACE TM0108-2008
Test Solution: 1 mol/L H₂SO₄
Current Density: 15,000 A/m²
Accelerated Life: > 72 hours
Key Features
Long service life (up to 50 years)
Uniform current distribution
Flexible ribbon design for easy installation
High efficiency in low-resistivity and high-resistivity environments
Suitable for large-area protection systems
Applications
Oil & gas storage tank bottom protection
Underground storage tanks
Pipelines and buried structures
Marine and offshore structures
Concrete reinforcement protection
Water treatment systems
Advantages
Superior performance compared to traditional sacrificial anodes
Lower maintenance and replacement costs
Stable output current over long periods
Suitable for complex geometries and large surfaces
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