What Is A Ru-Ir Titanium Anode?

What Is a Ru-Ir Titanium Anode?

 

Ru-Ir-Ti anodes are a class of dimensionally stable anodes (DSAs) based on a titanium substrate coated with a ternary mixed metal oxide (MMO) layer of ruthenium, iridium, and titanium oxides. Combining mechanical durability with high electrocatalytic activity, they are widely specified for chlorine-evolving electrochemical processes in chlor-alkali production, industrial water treatment, and seawater utilization.

 

Material Composition

 

Substrate: Grade 1 Pure Titanium

 

The anode substrate is manufactured from Grade 1 pure titanium (TA1) or Grade 2 pure titanium (TA2). Total impurity content is strictly controlled below 0.4%, ensuring adequate mechanical strength while delivering excellent corrosion resistance. This allows the anode to perform reliably in complex, demanding industrial electrolysis environments.

 

Oxide Coating: Mixed Metal Oxide (MMO)

 

The active coating is a RuO₂–IrO₂–TiO₂ ternary mixed metal oxide system, applied through a mature multi-layer coating and high-temperature oxidation sintering process with tightly controlled parameters. The resulting coating is dense, crystalline, and strongly adherent.

 

Ru + Ir total loading: 10–15 g/m²

Coating thickness: 8–10 μm

 

This balance delivers high electrocatalytic activity together with long-term reliability, improving resistance to electrochemical corrosion and extending service life.

 

Operating Conditions

 

Ru-Ir-Ti anodes are highly adaptable across industrial operating windows:

 

Parameter	Recommended Range
Electrolyte pH	2–10 (acidic and neutral media)
Operating temperature	≤ 50 °C
Maximum current density	< 2000 A/m²

 

Note that elevated temperatures accelerate coating degradation and should be avoided.