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Ruthenium-Iridium Titanium Anode

Q: What is the difference between Ru-Ir and Ir-Ta coated titanium anodes?

RuO2-IrO2 (Ru-Ir) coatings are preferred for chlorine evolution in chloride-rich electrolytes such as chlor-alkali, hypochlorite and seawater duty. IrO2-Ta2O5 (Ir-Ta) coatings suit oxygen evolution in acidic media.

RuO₂–IrO₂ coated titanium anodes for chlorine evolution in chloride-rich electrolytes, with coating loading and rating confirmed against your engineering data.

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Chlor-AlkaliHypochloriteSeawater ElectrolysisMarine CP

8–20 g/m²Ru-Ir Coating Loading

3–8 yrsDesign Life at Rating

100%Coating Batch Verified

24hEngineering Response

Ruthenium-iridium coated MMO titanium anodes for chlorine evolution duty

Selection Boundary

This page covers: RuO₂–IrO₂ coated (ruthenium-iridium) titanium anodes for chlorine-evolution duty — chlor-alkali, sodium hypochlorite generation, seawater electrolysis, pool chlorination and marine/saline cathodic protection.

This page does not cover: platinum-coated (Pt/Ti) anodes or Ir-Ta (acidic oxygen evolution) MMO anodes. For platinum-coated duty, see Platinum-Coated Titanium Anode. For oxygen evolution in acidic electrolytes, see Iridium-Tantalum Titanium Anode.

Selection note: coating loading, current density, and service life are interdependent and are confirmed together per quotation — none is guaranteed independently.

Introduction

Ruthenium-iridium coated titanium anodes (RuO₂–IrO₂/Ti) combine a titanium substrate with a mixed-metal-oxide coating engineered for chlorine evolution in chloride-rich electrolytes. They are the standard choice for chlor-alkali cells, sodium hypochlorite generators, seawater electrolysis and pool chlorination, where they hold a stable potential and low consumption under heavy chlorine duty. Actual performance depends on coating loading, current density and electrolyte chemistry, and is confirmed per quotation rather than stated as a universal value.

Ehisen applies the Ru-Ir coating in controlled multi-layers with measured precious-metal loading, and verifies every batch before dispatch. Each anode is engineered to your substrate dimensions, electrical duty, and operating conditions.

Ruthenium-iridium coated titanium electrode for pool chlorinator and chlorine duty

Product Gallery

Ruthenium-Iridium Titanium Anode Formats

Standard formats include plate, mesh, tube, rod and wire. Other shapes and dimensions are produced to drawing.

Ruthenium-iridium MMO titanium anodes for seawater cathodic protection

Ru-Ir seawater CP

Ruthenium-iridium titanium anodes for marine and chloride-rich duty

Ru-Ir marine duty

Ru-Ir MMO titanium anodes in chloride-rich environments

Chloride-rich service

Salt water pool chlorinator titanium electrode

Pool chlorinator electrode

Engineering Basis

The four inputs below define every Ru-Ir anode quotation. Provide them and we will confirm coating thickness, current-density rating and service life together.

Engineering Item	Required Definition
Target reaction	Anodic main reaction (OER / CER / other) and competing reactions
Electrolyte	Full composition, acidity, chloride / fluoride, contaminants
Electrical duty	Total current, current-density basis, polarity, peaks
Design-life basis	Failure criterion and expected operating hours

RuO₂–IrO₂: chloride-rich chlorine evolutionCoating verified by XRF thickness measurementSubstrate: ASTM B265 Gr1 / Gr2 titanium

Technical Specifications

Standard parameters are listed below; values marked per order are confirmed against your engineering data.

Parameter	Specification
Substrate	Grade 1 / Grade 2 titanium
Coating	Ruthenium-Iridium (RuO₂–IrO₂)
Coating loading	8–20 g/m², custom available
Shape	Plate / mesh / tube / rod / custom
Dimensions	Per drawing (L × W × T)
Current density	Confirmed per order
Operating temp	Confirmed per order
Service life	Confirmed per loading & conditions

Coating Quality

Coating Control & Surface Quality

Coating loading and uniformity are measured, not assumed — the parameters that actually control anode life and current distribution.

Ruthenium-iridium MMO coating process control on a titanium anode

Coating Loading & Uniformity

Active coating loading is measured and controlled per batch — the value that sets current-density rating and design life.

Titanium anode life extension testing under electrochemical load

Bonding & Thermal Cycling

Adhesion and thermal cycling are checked during production to keep the coating stable under thermal and electrochemical load.

Order Basis

Share the five requests below and we will return a quotation with coating loading, rating and life confirmed together.

Request	Definition
Electrolyte composition	Full formula, acidity, temperature
Current duty	Total current / current density / polarity
Coating loading target	Thickness or life target
Dimensions	Drawing or dimensions
Connection	Welding / threaded / flange

Minimum order: negotiable per formatDocuments: MTC · coating report · XRF data · inspection record · CoC

More Titanium Anode Products

Titanium Electrode RangeAll MMO and platinized titanium anode formats across our product range. → Iridium-Tantalum AnodeIrO₂–Ta₂O₅ coated anodes for oxygen evolution in acidic electrolytes. → MMO Titanium AnodeMixed metal oxide coated titanium anodes for general electrolysis and plating duty. → Platinum-Coated AnodePlatinum coated titanium anodes for stability-critical electroplating and electrolysis duty. →

FAQ

What is the difference between Ru-Ir and Ir-Ta coated titanium anodes?

RuO₂–IrO₂ (Ru-Ir) coatings are preferred for chlorine evolution in chloride-rich electrolytes such as chlor-alkali, hypochlorite and seawater duty. IrO₂–Ta₂O₅ (Ir-Ta) coatings suit oxygen evolution in acidic media. Tell us your electrolyte and target reaction and we will recommend the right coating.

How long does a ruthenium-iridium titanium anode last?

Service life depends on coating loading, current density and operating conditions. A well-selected Ru-Ir anode typically lasts several years in normal chlorine duty; the exact life is confirmed per order against your duty cycle.

Can a ruthenium-iridium anode be re-coated after its coating wears out?

Yes. The titanium substrate can be stripped and re-coated with fresh Ru-Ir coating, significantly lowering long-term ownership cost.

Get a Quote for Your Application

Send your electrolyte composition, electrical duty and design-life target — we will confirm coating loading, current-density rating and service life together, within 24 hours.