Mixed Metal Oxide (MMO) Coated Titanium Ribbon Anode
As a key auxiliary anode in the Impressed Current Cathodic Protection (ICCP) system, the MMO Coated Titanium Ribbon Anode applies a cathodic current to the protected metal structure through an external power source, causing a negative potential to form on its surface and inhibiting the oxidative corrosion of the metal.
Core Advantages
MMO Coated Titanium Ribbon Anode
Titanium Ribbon Anode, with their unique material properties and structural design, demonstrate outstanding performance in the field of cathodic protection.
Electrochemical protection
In the field of modern industrial protection, cathodic protection is a key line of defense to ensure the durability of metal structures, and MMO Coated Titanium Ribbon Anode are the core hub of this line of defense. As a key auxiliary anode in the Impressed Current Cathodic Protection (ICCP) system, it applies cathodic current to the protected metal structures, such as storage tanks and pipelines, through an external power source, causing their surfaces to form a negative potential, thereby inhibiting metal oxidation and corrosion.
Electrochemical process
The surface of the titanium ribbon anode is coated with a mixed metal oxide (MMO) coating, with the common iridium tantalum oxide coating being a typical example. These coatings possess high electrocatalytic activity. For instance, at a current density of 1A/cm², their overpotential is 140mV lower than that of graphite anodes. This significant advantage enables them to reduce the overpotential of oxygen evolution and chlorine evolution reactions and conduct current efficiently.
Material and Structural Design
Dual protection for long-term performance
Substrate material: Grade 1 or Grade 2 titanium conforming to ASTM 265 standard is used, which enables the titanium ribbon anode to work for a long time in harsh environments. Titanium can quickly form a dense oxide film in oxidizing media, with a thickness of only 0.2μm, but it can achieve an extremely low corrosion rate, which is less than 0.01mm/year in 3.5% NaCl solution. Whether under the erosion of complex chemicals in the soil, in the high-salinity and highly corrosive environment of seawater, or in the acid-base conditions of chemical solutions, it can also resist corrosion by virtue of the oxide layer, maintain the integrity of its own structure, and provide stable support for the coating.
Oxide coating: The active metal salt solution is repeatedly coated and sintered on the surface of the titanium strip through a thermal decomposition method to form a nanoscale oxide coating. From a microscopic perspective, this coating not only enhances conductivity with low resistivity, allowing current to flow unimpeded, but also has strong environmental adaptability through electrochemical stability design.It can maintain a complete structure. This characteristic avoids the common self-corrosion problem of traditional anodes, enabling the titanium strip anode to operate stably under various harsh working conditions and ensuring the efficient operation of the cathodic protection system.
Define the effectiveness of the cathodic protection system
- Provide effective protection for storage tanks, pipelines, etc.
In various industrial scenarios, corrosion is a challenging problem faced by metal structures. However, titanium strip anodes, with their excellent corrosion resistance, provide effective protection for storage tanks, pipelines, and the like. This characteristic stems from their unique material composition and structural design, where the titanium substrate and MMO coating form a closely collaborative protective system. Titanium itself has a self-passivation property; upon contact with oxidizing media, a dense oxide film is rapidly formed on its surface. This oxide film, like armor, effectively blocks further erosion of the titanium substrate by external substances and prevents the occurrence of uniform corrosion. The MMO coating on the surface, on the other hand, adds even stronger protective power to this armor, specifically targeting localized pitting corrosion, intergranular corrosion, and other forms of corrosion with highly targeted defense.
- dimensional stability
MMO titanium ribbon anodes, with their stable dimensions, ensure the uniform distribution of cathodic protection potential, with a deviation of <±50mV. In large tank farms, when titanium ribbon anodes are used for cathodic protection, long-term monitoring has shown that the potential distribution in various parts of the tank bottom is very uniform, effectively avoiding the occurrence of local corrosion and ensuring the safe operation of the tanks. In the cathodic protection projects of long-distance natural gas pipelines, titanium ribbon anodes also play an important role, ensuring the stability of the potential of pipelines along the route, extending the service life of the pipelines, and reducing pipeline maintenance costs and safety risks.
Application scenarios
Lifecycle protection of storage tanks and pipelines
Anti corrosion of storage tanks:
In the energy sector, various types of storage tanks are key facilities for storing petroleum, chemical raw materials, LNG, and other important energy sources. However, these storage tanks face severe corrosion threats for a long time, especially at the tank bottom and inner walls. Titanium ribbon anodes have demonstrated excellent protective capabilities in this field. They are usually laid in a grid pattern and work in conjunction with titanium conductive strips to form an efficient network with uniform current distribution. In the 300,000-cubic-meter large-scale storage tank project, after the application of titanium ribbon anodes, the originally severe electrochemical corrosion at the tank bottom has been effectively inhibited.
Pipeline Protection:
For the energy transportation of buried oil and gas pipelines, safety is of paramount importance. Take 80 steel pipelines as an example. In complex soil environments, especially in high-resistivity soils (>50Ω・m) or areas with stray current interference, traditional anodes often struggle to provide effective protection. However, titanium ribbon anodes can easily handle these challenges. They are buried along the axial direction of the pipeline and work closely with cathodic protection test stakes to monitor pipeline potential in real-time. Through stable current output, they provide continuous and reliable protection for the pipeline, avoiding protection failure caused by soil polarization and ensuring the unimpeded transportation of energy.
Application Environments of ICCP MMO Coated Titanium Ribbon Anode
ICCP MMO titanium strip anodes have a wide range of applications and can be used in various environments, including:
- In sandy environments, the anodes can effectively protect structures from corrosion.
- In environments with chlorine precipitation, oxygen precipitation, or a mixture of both, the anodes can provide effective cathodic protection.
- Titanium strip anodes are commonly used for cathodic protection at the bottom of underground storage tanks and in reinforced concrete structures. They are designed to protect the outer walls of tank bottom plates through the applied current.
ICCP MMO Coated Titanium Ribbon Anodes are efficient and adaptable solutions for corrosion protection in various environments.
