Expanded Mesh Mixed Metal Oxide Anodes (MMO Anodes), also called dimensionally stable anodes, are a type of impressed current protection anode that consists of rare earth oxide coated onto titanium substrate. MMO coating has a low consumption rate, making the metal dimensions remain constant during the working life of the anode, which provides a consistently low resistance anode. It is typically used in environments such as seawater, brackish water, fresh water, carbon backfill, and concrete.

• Anode material: Titanium in Grade 1 or 2
• Coating: Ruthenium Oxide
• Coating thickness: 2-15 micron
• Mesh type: Expanded mesh
• Mesh opening: 0.787 mm - 3.175mm
• Mesh thickness: 0.051mm - 0.254mm
• Anode shape: Customizable according to drawing request
• Current density: ≤2000A/M²
• Temperature: <60°C
• PH range: 0.1~14
• Max fluoride ion content: 200PPM
• Electrolyte: Chloride
• Service life: 1-3 Years

Mixed metal oxide (MMO) refers to a specialized coating used in cathodic protection applications. It consists of an electrocatalytic component that facilitates current flow and bulk oxides that protect the substrate from corrosion.

Ruthenium oxide and iridium oxide are common electrocatalysts, with iridium oxide being preferred for its versatility in different environments. The bulk oxides, typically a mix of titanium dioxide and tantalum oxide, form a protective oxide film over the substrate to prevent corrosion. Each manufacturer has a proprietary formula for their MMO coating, optimized for specific application requirements.