water treatment cathodic protection application mmo coating titanium anode

MMO anodes has the advantage of low consumption rate and high current capacity, the consumption rate of the MMO anode is counted only milligrams per ampere year, and also as a result of this low consumption rate, the metal dimensions remain nearly constant during the design life of the anode, therefore providing a consistently low resistance performance. So this type of anodes became widely used for the impressed current CP in groundbed and marine structures.

Yuxi manufacture all range of MMO anodes used for Cathodic Protection, including rods, tubes, ribbons, plates and meshes. The anodes are made using titanium substrates which are coated with a mixed metal oxide catalyst, the catalyst is applied by multiple thermal process to form an extremely chemical resistant bond, this MMO coating can enhance the conductive properties of the anode and while the titanium is inherently stable, therefore brings superior performance.

Anode types:

l  Solid rod anode

l  Tubular anode

l  Ribbon anode

l  Mesh anode

l  Piggyback wire anode

l  Plate/Disc anode

MMO anode can be used effectively in all types of environments, such as directly buried in soil, fresh water and salt water. There are two types of catalyst, one is iridium-­tantalum system which typically used for soil and fresh water, and the other adding ruthenium into iridium-­tantalum formulation for salt water application. The recommended current density in soil, coke breeze, fresh water is 100Amps/m2 and in salt water is 600Amps/m2.

Solid Rod Anode:

The rod anodes always assembled with junction box with a mounting thread to protect the tanks or vessels.

Tubular Anode:

Tubular type is the most common MMO anodes used in cathodic protection, the titanium hollow tubes conforms to ASTM B338 grade I standard. This type of anodes always made in strings consisting several pieces of MMO tubes used for deep well cathodic protection system. The cable type and size can be XLPE/PVC, HMWPE, Kynar/HMWPE, etc. from 6sqmm (10AWG) to 35mmsqmm (2AWG).

Cable Connection

String anode for deep well application:

Canister MMO Anode:

Ribbon Anode:

Yuxi’s MMO ribbon anodes are manufactured using titanium substrate which meets ASTM B265 Grade 1 Standard and coated with Mixed Metal Oxide ( Ir/Ta).

Nominal Specification:

Titanium Conductor Bar: