What Is a DSA Coated Titanium Anode?

In the evolving world of electrochemical processes, the DSA coated titanium anode has become one of the most reliable and efficient electrode technologies. Combining durability, corrosion resistance, and superior conductivity, this innovative electrode plays a vital role in industries ranging from wastewater treatment to chlor-alkali production. Its ability to deliver consistent performance while reducing operating costs makes it a preferred choice for global enterprises seeking long-term solutions.

What Is a DSA Coated Titanium Anode?

A DSA coated titanium anode (Dimensionally Stable Anode) is an electrochemical electrode designed for prolonged service in harsh operating environments. It consists of a titanium substrate coated with a mixed metal oxide (MMO) layer. The MMO coating typically contains ruthenium oxide (RuO₂), iridium oxide (IrO₂), or a combination of platinum group metals that act as efficient catalysts for oxygen or chlorine evolution reactions.

Key Features

Dimensionally stable – maintains its shape during long-term electrolysis.

Corrosion-resistant – withstands aggressive acids, alkalis, and chloride solutions.

High catalytic activity – reduces energy consumption in electrochemical processes.

Long service life – outperforms conventional graphite or lead-based anodes.

Manufacturing Process of DSA Coated Titanium Anodes
1. Titanium Substrate Preparation

The substrate is usually made from Grade 1 or Grade 2 pure titanium, which is lightweight and highly corrosion-resistant. Before coating, the titanium undergoes mechanical polishing, sandblasting, and acid pickling to remove oxides and impurities, ensuring proper adhesion of the catalytic layer.

2. MMO Coating Application

The coating is applied through thermal decomposition or electrochemical deposition. In the thermal decomposition method, a precursor solution of noble metal salts is sprayed onto the titanium surface, followed by repeated cycles of drying and high-temperature calcination. This process forms a tightly bonded layer of RuO₂-IrO₂ or other active oxides.

3. Heat Treatment and Stabilization

The coated substrate is subjected to controlled heat treatment, improving adhesion and crystallinity of the coating. This enhances both catalytic activity and durability.

4. Quality Testing

Each DSA coated titanium anode undergoes rigorous quality control, including electrochemical testing for overpotential, coating adhesion, and service life simulation.

Why Choose DSA Coated Titanium Anodes?
1. Extended Service Life

Unlike graphite or lead dioxide electrodes that degrade quickly, the DSA coated titanium anode maintains stability over thousands of operational hours.

2. Reduced Energy Consumption

The mixed metal oxide coating lowers the overpotential for chlorine and oxygen evolution, cutting power costs for industries operating large-scale electrolytic cells.

3. Environmental Benefits

DSA anodes eliminate toxic lead contamination and reduce chemical byproducts, making them an eco-friendly solution for water treatment and electrochemical manufacturing.

Applications of DSA Coated Titanium Anodes
1. Water and Wastewater Treatment

One of the largest applications of the DSA coated titanium anode is in electrochemical water treatment. By generating strong oxidants such as chlorine, ozone, and hydroxyl radicals, these anodes efficiently disinfect water, degrade organic pollutants, and break down persistent contaminants in industrial wastewater.

2. Chlor-Alkali Industry

In chlorine production, DSA coated titanium anodes are the standard choice due to their excellent chlorine evolution selectivity and resistance to brine corrosion.

3. Metal Electroplating and Electrowinning

From copper and nickel to gold and zinc, the DSA anode is essential for ensuring uniform metal deposition. In electrowinning, it improves current efficiency and minimizes impurities in the recovered metals.

4. Cathodic Protection

In marine and underground structures, DSA coated titanium anodes provide impressed current cathodic protection (ICCP), protecting pipelines, tanks, and ships from corrosion.

5. Electro-synthesis of Chemicals

DSA anodes are widely used for producing persulfates, perchlorates, and other oxidizing agents required in chemical industries.

Technical Parameters of DSA Coated Titanium Anodes

Parameter	Typical Value
Substrate	Grade 1/2 Titanium
Coating Material	RuO₂, IrO₂, Ta₂O₅, or Pt Group Oxides
Current Density	50–5000 A/m²
Cell Voltage Reduction	Up to 0.3 V compared with graphite
Operating Temperature Range	20–80°C
Service Life	5–15 years (depending on conditions)

Industry Case DSA Coated Titanium Anodes
1: Wastewater Treatment Plant in Europe

A municipal wastewater facility replaced its lead dioxide anodes with DSA coated titanium anodes. The result was a 40% reduction in energy consumption and a significant decrease in maintenance costs due to the anode’s long service life.

2: Chlor-Alkali Manufacturer in Asia

By switching to DSA technology, the company achieved improved chlorine purity and extended anode life from 2 years to over 8 years, increasing overall production efficiency.

The DSA coated titanium anode stands at the forefront of electrochemical innovation. Its stability, efficiency, and eco-friendly performance make it indispensable in industries such as water treatment, chemical production, and metal processing. As environmental regulations tighten and energy costs rise, more enterprises are turning to this advanced electrode technology for sustainable solutions.

Company Introduction

Baoji City ShenAo Metal Materials Co., Ltd. is a leading manufacturer of titanium and non-ferrous metal materials. With decades of expertise in precision manufacturing, the company specializes in producing DSA coated titanium anodes, MMO anodes, titanium clad plates, and other advanced materials for global industries.

Contact Details
Baoji City ShenAo Metal Materials Co., Ltd.
Address: Wenquan Village Industrial Park, High Tech Zone, Baoji City
Contact: Wang Shujuan
Phone: 18729731603
Email: zh@baojiti.com.cn
Website：https://www.shenaocladplate.com