MMO Titanium Anodes
MMO titanium anodes are a titanium substrate carrying a mixed metal oxide coating. The family covers eight geometries, each with its own installation method, current distribution and order basis.
Coating Family
MMO and DSA Are Not Two Different Products
MMO describes the coating chemistry — a mixed metal oxide layer applied to a titanium substrate and defined by its composition and loading. DSA describes dimensional stability, the property that lets a coated electrode keep its geometry and its active area under load. Industrial markets frequently use both terms for the same or an overlapping product. A qualified MMO/Ti anode therefore means a titanium substrate with a defined mixed metal oxide coating, not a generic label, and the composition, the loading basis and the substrate still have to be stated for the order.
Ru-Ir Mixed Metal Oxide
Ruthenium and iridium oxide systems, commonly reviewed for chlorine evolution in chloride media and for electrochlorination and hypochlorite generation.
Review this coating system →Ir-Ta and Ir-Based Mixed Metal Oxide
Iridium and tantalum oxide systems, commonly evaluated for oxygen evolution, alkaline service and selected advanced oxidation duties.
Review this coating system →Ru-Ti Mixed Metal Oxide
Ruthenium and titanium oxide systems used where a general mixed metal oxide coating is reviewed against a defined chloride or oxidising service.
Review this coating system →Where the geometry pages sit
The coating and the shape are independent decisions. Each of the eight pages below covers one geometry in depth — its construction, its order basis, its installation and the boundary against the closest alternative.
Geometry Range
Eight MMO Anode Geometries
The geometry follows the installation and the way the current has to be distributed, not the shape name. Each card opens the product page for that form.
MMO Linear Anode
A pre-packaged flexible anode string, not a bare coated wire: MMO core, copper cable, conductive backfill and protective sleeve supplied as one assembly.
Review MMO Linear Anode →MMO Wire Anode
The bare MMO coated titanium wire itself — supplied on a spool for the buyer to route, terminate and support, without a packaged backfill or sleeve.
Review MMO Wire Anode →MMO Ribbon Anode
A solid, flat titanium ribbon with MMO coating, laid as long parallel runs to spread current over a wide surface at very low profile.
Review MMO Ribbon Anode →MMO Mesh Ribbon Anode
An expanded titanium mesh ribbon, coated on the active surfaces, for concrete members and large areas where a higher effective surface is needed.
Review MMO Mesh Ribbon Anode →MMO Canister Anode
A complete deep-well groundbed: coated titanium active anode, metal canister, conductive backfill, cable and a sealed, tested connection.
Review MMO Canister Anode →MMO Tubular Anode
A coated titanium tube used as the active electrode in groundbeds, seawater service and industrial cells, supplied bare and ready for installation.
Review MMO Tubular Anode →MMO Disc Anode
A flat circular titanium disc with an MMO coating, used where a compact active face has to sit in a restricted space.
Review MMO Disc Anode →MMO Rod Anode
A straight MMO coated titanium rod used as a compact impressed current electrode in structural protection and in electrode assemblies.
Review MMO Rod Anode →Selection Matrix
Match The Geometry To The Installation
Use the installation environment and the way the current has to be distributed to shortlist the form. The design current, the environment and the access then fix the size.
| Geometry | Form | Normally Used For | What Limits The Choice |
|---|---|---|---|
| Linear | Pre-packaged flexible string with cable, backfill and sleeve | Pipelines, tank bottoms and concrete, over long runs | Delivered as a finished package; installation is limited to routing and jointing |
| Wire | Bare coated wire on a spool, coil or cut length | Pipe walls, vessel interiors and distributed protection | No backfill or conductor included; routing and termination are the buyer scope |
| Ribbon | Solid flat coated strip | Tank bottoms, large surfaces and long low-profile runs | Requires a prepared and accessible surface |
| Mesh Ribbon | Expanded coated mesh strip | Reinforced concrete and large-area distributed protection | Heavier per metre and less flexible around tight corners |
| Canister | Coated element in a metal canister with backfill and sealed cable | Deep groundbeds, restricted access and marine installations | Installation depth, hole diameter and grouting must be agreed in advance |
| Tubular | Coated titanium tube | Groundbeds, seawater service and industrial cells | Needs backfill in soil; end closure and feed are separate details |
| Disc | Flat coated circular plate | Restricted spaces, fixed positions and local duties | Point-type element; it does not distribute current along a length |
| Rod | Straight coated rod with a defined active length | Compact groundbeds, marine structures and electrode assemblies | Industrial MMO product only, not a consumer anode rod |
Order Basis
What Has To Be Defined For The Quotation
An anode order is more than a coating name. These are the inputs the specification and the inspection plan are built on.
| Order Input | What The Order Has To State |
|---|---|
| Substrate | Commercially pure titanium, typically Grade 2 or Grade 1, confirmed against the service |
| Coating composition | Mixed metal oxide family and the specific oxide combination for the order |
| Loading basis | Mass per unit coated area with its units, or a thickness basis where the order defines one |
| Active area | Coated surface used as the basis for the current density |
| Current density basis | Stated per unit of coated active area, not per unit of gross geometry |
| Geometry | The one of the eight forms, with dimensions and the uncoated connection zone |
| Operating environment | Electrolyte or soil, temperature, flow and any contaminant exposure |
| Design life | The basis the coating life and the substrate condition are assessed against |
FAQ
MMO Titanium Anode Questions
Is every MMO titanium anode the same product?
No. MMO identifies the coating family, not a single formulation. Ru-Ir, Ir-Ta and Ru-Ti systems behave differently against chlorine evolution, oxygen evolution and general oxidation duties, and each of them responds to impurities, pH, temperature and load in its own way. The coating family is only the starting point of the selection.
How do I choose between the eight MMO geometries?
Start from the installation rather than the shape name. A long buried or immersed run is usually a linear anode; a prepared flat surface is usually a ribbon; a restricted space points to a disc or a rod; a deep groundbed points to a canister; a conventional groundbed points to a tubular anode. The design current, the environment and the access then fix the size.
What is the minimum information needed for a quotation?
The service conditions, the design current and its active-area basis, the coating family required, the geometry and dimensions, the connection method and the required documents. An incomplete specification is not a blocker — the missing items are identified during the technical review and confirmed before the order is released.
Can an MMO titanium anode be supplied uncoated or recoated?
Recoating of a used titanium substrate is possible but is a condition-based decision, not a default. The remaining substrate, deformation, cracks, welds, the connection, contamination and the coating removal route all have to be evaluated first. The recoating review on the titanium anode hub lists the items that are checked.
Describe The Electrochemical Duty
Reaction, electrolyte, current density with its active-area basis, geometry, target life and the inspection evidence you need. A complete specification is not required for the first review.