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Iridium Oxide Coated Titanium Anodes

IrO₂ coated titanium anodes engineered for oxygen-evolution duty in acidic electrolytes, electroplating and cathodic protection, with coating loading and rating confirmed against your duty.

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Oxygen EvolutionElectroplatingWater TreatmentCathodic Protection

1–5 µmActive IrO₂ Coating

5–10 yrsDesign Life at Rating

100%Coating Batch Verified

24hEngineering Response

Iridium oxide coated titanium anode manufactured by Ehisen

Selection Boundary

This page covers: iridium oxide (IrO₂) coated titanium anodes — the oxygen-evolution member of the MMO family — for electroplating, water treatment, electrolysis and cathodic protection where oxygen is the target anodic reaction.

This page does not cover: platinum-coated (Pt/Ti) anodes or chlorine-evolution MMO coatings. For platinum-coated duty, see Platinum-Coated Titanium Anode. For chlorine-evolution duty, see Ruthenium-Iridium Titanium Anode, and for the fuller MMO range see MMO Titanium Anode.

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

Introduction

Iridium oxide (IrO₂) coated titanium anodes are the oxygen-evolution workhorse of the MMO family. Where chlorine-evolution coatings suit chloride-rich electrolytes, an IrO₂ based coating is matched to acidic oxygen-evolution duty — chrome plating, electro-winning, water treatment and cathodic protection — keeping the anode dimensionally stable while the counter reaction proceeds. Actual performance depends on coating chemistry, loading, current density and electrolyte chemistry, and is confirmed per quotation rather than stated as a universal value.

Ehisen applies IrO₂ based coatings 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.

Chlorine evolution vs. oxygen evolution on MMO titanium anodes

Product Gallery

Iridium Oxide Anode Formats

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

Iridium oxide coated titanium tube anode

Tubular IrO₂ anode

IrO2 titanium anodes for oxygen-evolution cathodic protection conditions

Oxygen-evolution CP

Iridium oxide coated MMO titanium anode sample

Coated anode sample

Iridium oxide coated titanium anode at a customer facility

Field application

Engineering Basis

The four inputs below define every iridium oxide 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

IrO₂ coating: matched to oxygen 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	Iridium oxide (IrO₂ based)
Coating loading	8–20 g/m², custom available
Shape	Plate / mesh / tube / probe / 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.

IrO2 coating inspection on a titanium anode sample

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 electrolysis, plating and cathodic protection duty. → Dimensionally Stable AnodeInsoluble coated titanium anodes that hold dimensions under continuous electrolysis and plating duty. →

FAQ

What is an iridium oxide coated titanium anode?

An iridium oxide coated titanium anode combines a titanium substrate with an active IrO₂ based oxide layer. It is the oxygen-evolution member of the MMO family, used where the target anodic reaction is oxygen — such as chrome plating, electro-winning, water treatment and cathodic protection.

How long does an iridium oxide coated titanium anode last?

Service life depends on coating loading, current density and operating conditions. A well-selected IrO₂ anode typically lasts several years in normal duty; the exact life is confirmed per order against your duty cycle.

Can an iridium oxide coated anode be re-coated after its coating wears out?

Yes. The titanium substrate can be stripped and re-coated with fresh iridium oxide 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 chemistry, loading, current-density rating and service life together, within 24 hours.