MMO Titanium Anode for Chlor-Alkali

Wstitanium is a Chinese manufacturer and supplier of titanium anodes. Its chlorine-evolving and oxygen-evolving titanium anodes include iridium, ruthenium, and platinum anodes. These anodes are used in chlor-alkali industries, marine, shipbuilding, electroplating, electrolysis, hydrometallurgy, wastewater treatment, and cathodic protection.

20+ YEARS EXPERIENCE SENIOR BUSINESS MANAGER

info@wstitanium.com

Ask Michin For What You Want?

Full Range of MMO Titanium Anodes For Chlor-alkali Solutions

MMO titanium anodes exhibit exceptional resistance to strong acids, high salts, and corrosion, making them suitable for all complex operating conditions in the chlor-alkali industry (high-impurity brine, high temperature, high current density). They possess high catalytic activity, effectively suppressing the oxygen evolution reaction (OER). Current efficiency is ≥96%. MMO titanium anodes do not cause substrate dissolution or heavy metal precipitation, thus preventing pollution of the electrolyte, products, and environment. Wstitanium’s full range of chlor-alkali-specific MMO titanium anodes strictly adheres to five authoritative standards: ASTM B265-2025 (titanium materials), GB/T 23756-2021 (electrodes), HG/T 2471-2007 (electrodes), Euro Chlor BAT 2024 (environmental protection), and The Chlorine Institute (safety). Support for SGS and RoHS third-party quality inspection.

Coating

The function of the MMO coating is to reduce the overpotential of the chlorine evolution reaction (CER). A lower chlorine evolution overpotential results in lower energy consumption in the electrolyzer. Wstitanium optimizes Ru-series, Ir-series, Ru-Ir-series, and Ir-Ta-series coatings based on brine purity, current density, and operating temperature, adjusting the proportion of precious metals, loading, and sintering temperature to ensure perfect matching of coating performance with operating conditions.

RuO₂-TiO₂

RuO₂ serves as the active catalytic center for chlorine evolution, responsible for reducing the chlorine evolution overpotential and improving current efficiency. TiO₂ acts as the support, enhancing the adhesion between the coating and the substrate.

Molar ratio: RuO₂ 70% + TiO₂ 30%
Precious metal loading: 8~20 g/m²
Temperature: ≤85℃
Chlorine evolution potential: ≤1.13V
Accelerated life (ALT): ≥3000 min
Current efficiency: ≥96%
Coating adhesion: ≥25MPa

RuO₂-IrO₂-TiO₂

IrO₂ effectively resists corrosion from brine impurities (Ca²⁺, Mg²⁺, Fe³⁺), high temperatures, and strong acids. Suitable for diaphragm-type chlor-alkali processes and high-impurity brine conditions. It is one of Wstitanium’s core customized coatings.

RuO₂ 60% + IrO₂ 20% + TiO₂ 20%
Precious metal loading ≥15g/㎡
Temperature: ≤95℃
Chlorine evolution potential: ≤1.10V
Current efficiency: ≥98%
Coating thickness: 8-30μm
Enhanced lifespan: ≥3000min

IrO₂-Ta₂O₅

Suitable for ion-exchange membrane chlor-alkali production, chlorate production, and waste chlorine recovery electrolysis. No heavy metal precipitation; chlorine purity ≥99.8%; caustic soda purity ≥32.5%. Wstitanium provides a 5-year standard warranty.

Molar ratio: IrO₂ 60% + Ta₂O₅ 40%
Coating load: 12~30g/㎡
Chlorine evolution potential: ≤1.14V
Current efficiency: ≥96.5%
Coating adhesion: ≥32MPa
Temperature: 85~95℃
Current density: 300~5000A/m²