Description of Mixed Metal Oxide Titanium Rod Anode
Mixed metal oxide (MMO) anodes, also known as dimensionally stable anodes, are a type of impressed current cathodic protection anode. They consist of a coating of rare earth oxide applied onto a titanium substrate.
There is no fixed industry definition for "Mixed Metal Oxide", and each supplier uses its own formulation for the coating. Typically, the mixed metals ruthenium oxide (RuO2) and iridium oxide (IrO2) are employed primarily in cathodic protection applications.
The MMO coating exhibits a low consumption rate. Consequently, the metal dimensions remain constant during the anode's operational life, thereby maintaining a consistently low electrical resistance. The anode is used in environments such as seawater, brackish water, freshwater, carbon back-fill and concrete.

Advantages
- High resistance under conditions affected by both oxygen and chlorine
- Various product compositions available depending on the application
- Demonstrated resistance in acidic media
- Long service life
Specification of the Mixed Metal Oxide Titanium Rod Anode
Designation
|
Diameter (mm)
|
SMMOR-1
|
3.2
|
SMMOR-2
|
6.4
|
SMMOR-3
|
12.7
|
SMMOR-4
|
19
|
SMMOR-5
|
25
|
Applications of the Mixed Metal Oxide Titanium Rod Anode
- Manufacture and supply of a wide range of anodes for the electrochemical industry
- Internal protection of capacitors and process equipment
- Internal protection of water tanks and pipelines
- Protection of reinforced concrete structures