Titanium Anode Mesh

NAVI Titanium's titanium anode mesh features a mesh design that increases the effective reaction area, promotes electrolyte flow, and allows bubbles to escape quickly, reducing the 'bubble shielding effect' and, in turn, lowering battery voltage and energy consumption. It's widely used in various industries like electroplating, water treatment, and cathodic protection. NAVI Titanium uses high-quality TA1/TA2 pure titanium for all of its anode mesh bases, fully meeting the ASTM B265 international industrial pure titanium standard, and their excellent professional team provides comprehensive one-on-one service.

As essential electrocatalytic components for diverse industrial processes, MMO-coated titanium anodes enjoy broad application. The table below lists the corresponding application fields of different coatings.

 

 

NAVI Titanium supplies coated titanium mesh anodes. We customize cylindrical, square, disc, strip and special shaped electrodes. Expanded titanium mesh offers large reaction area, excellent conductivity and corrosion resistance, widely used in electrolysis, sodium hypochlorite and wastewater treatment systems.

ICCP(Impressed Current Cathodic Protection)

 

Titanium mesh anodes are commonly used as auxiliary anodes in cathodic protection projects. Both types typically consist of a titanium substrate coated with a precious metal oxide layer, offering outstanding corrosion resistance. They feature a mesh structure woven from titanium wire, forming a mesh surface. These anodes are typically installed beneath the base plates of large storage tanks, large-scale platform steel structures, and expansive metal floors to provide protection for flat, long-span metal structures.

Particularly at the bottom of storage tanks, once the mesh anodes are laid flat, they form a current-dissipating network that covers the entire area, providing comprehensive protection for the tank bottom. This ensures long-lasting, uniform cathodic protection and effectively prevents corrosion caused by the soil beneath the tank.

NAVI Titanium's production sites hold ISO 9001 certification. All raw material batches undergo 100% inspection to guarantee full compliance, with non-conforming materials rejected outright. In the interest of transparency and to demonstrate our rigorous quality control framework, NAVI Titanium provides the list below of our current and former raw material suppliers for reference purposes only.

From mass production of standard products to custom non-standard electrodes for demanding operating conditions, NAVI Titanium delivers end-to-end titanium anode solutions backed by robust manufacturing expertise, rigorous process control and agile response. This blog centers on the production workflow of NAVI Titanium MMO titanium anodes. It breaks down the full manufacturing journey chapter by chapter: raw material screening, precision forming, surface activation, coating formulation, high-temperature sintering, quality testing, and custom non-standard fabrication. Click the button below to explore further details:

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Choosing a titanium anode mesh is not simply a matter of selecting the grade of titanium and the type of coating. The actual electrochemical performance and lifespan of the anode depend on the substrate, mesh geometry, coating system, and operating conditions.

Have a specific titanium anode mesh requirement? Send us your drawing, operating parameters or existing electrode specifications. Our engineers can review the configuration and recommend a suitable substrate, mesh structure and coating system.

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The deep treatment of municipal biochemical wastewater, printing and dyeing, electroplating, garbage leachate, and chemical comprehensive wastewater is generally constrained by five common working conditions: low concentration of recalcitrant organic matter, complex heavy metals, total nitrogen residue, hardness scaling, and intermittent start-up and shutdown maintenance. NAVI Titanium's titanium anode mesh relies on a two-dimensional three-dimensional woven topology structure, utilizing three unique advantages: water flow cutting turbulent compression of the liquid phase boundary layer, passive self-cleaning of multi-directional oxygen evolving bubbles, and synchronous oxidation of COD/reduction of nitrate nitrogen by pore micro potential gradient. It has become the core electrode carrier for sewage depth improvement.

The core difficulty of advanced sewage treatment lies in the low concentration of pollutants in the water body, slow diffusion rate of pollutant molecules, stable laminar liquid film formed on the smooth surface of the flat electrode, and a large amount of trace organic matter and nitrate nitrogen trapped inside the liquid film unable to contact the active sites of the coating, which limits the efficiency of electrocatalytic reaction. The three-dimensional braided structure of the anode titanium mesh naturally changes the fluid dynamics around the electrode, and the mass transfer advantage is not simply a larger geometric area. The core relies on the triple unique effects of grid cutting water flow turbulence, multi-directional bubble self-cleaning, and pore micro potential zoning, which are the core basis for deep upgrading of low concentration wastewater.

Disadvantages of static liquid film on flat electrode

 

The water flow of the flat titanium electrode flows parallel to the smooth surface, forming a uniform stationary liquid phase boundary layer in laminar state. The liquid film thickness of the biochemical tail water system at room temperature is stable at 90-125 μ m, and the diffusion resistance of low concentration pollutants is extremely high; When the SS of the water body is greater than 30mg/L, the sludge colloid continues to deposit on the surface of the plate, forming a dense insulating dirt layer. The thickness of the boundary layer doubles directly, and the catalytic efficiency decays by more than 50%. In addition, the flat plate has no three-dimensional pores, and the oxygen evolution bubbles only float up along a single vertical direction. The bubble size is large, the flushing force is weak, and the dirt accumulates statically for a long time. Only manual cleaning can be carried out after shutdown, greatly increasing the labor cost of sewage station operation and maintenance.

Turbulent compression boundary layer mechanism of anode titanium mesh

 

When the water flows through the anode mesh opening, the titanium wire evenly cuts and splits the continuous water flow, generating a large number of micro sized vortices that continuously disturb and tear the stationary liquid phase boundary layer, compressing the liquid film thickness to 18-42 μ m, reducing the diffusion resistance of pollutant molecules by 60%, and increasing the removal rate of trace COD and nitrate nitrogen by 20% -35% compared to flat electrodes under the same coating system. The turbulence effect is constrained by rigid mesh specifications:

only the mesh in the range of wire diameter 0.8-2.5mm and aperture 5-20mm can form stable and effective vortices; The ultra fine titanium mesh with a wire diameter of less than 0.8mm has narrow openings, and there is no obvious vortex disturbance when water flows through. The advantage of boundary layer compression completely disappears, which is equivalent to an inefficient porous flat electrode. This is the first major misconception in sewage selection.

Passive self-cleaning and anti scaling mechanism of multi-directional oxygen evolution bubbles in grid

 

The continuous oxygen evolution reaction of the sewage anode generates micrometer sized oxygen bubbles, and the bubbles on the flat electrode float in a single direction, making it easy for sludge and calcium magnesium to deposit in the gaps; Bubbles are synchronously released from the front and back of the titanium anode mesh, the inner side of the mesh, and the intersection point. The bubbles float in multiple directions, collide and break, generating micro jet impact force, continuously flushing suspended solids, organic colloids, and inorganic salt microcrystals attached to the inner wall of the pore, achieving continuous passive self-cleaning and greatly extending the water washing maintenance cycle.

Subdivision of critical anti blocking grid specifications for sewage quality threshold:
Municipal biochemical wastewater (SS 10-30mg/L, total hardness 200-400mg/L): wire diameter 1.2-2.0mm, pore size 8-15mm spot welded mesh, sufficient bubble flushing force, continuous operation for 6 months only forms thin soft scale, which can be easily removed by hydraulic flushing;

Secondary effluent from printing and dyeing (high dye colloid, SS<15mg/L): medium-sized mesh with a wire diameter of 0.8-1.5mm and a pore size of 5-10mm, with strong adsorption of dye colloid by small bubbles to avoid coating with colored substances;

Concentrated leachate from garbage (high humic acid, high calcium and magnesium hardness, SS>50mg/L): It is strictly prohibited to use fine grids with a pore size of less than 8mm. Coarse grids with a wire diameter of 2.0-2.5mm and a pore size of 15-20mm must be selected. Large pores should reserve space for inorganic salt crystallization, and strong atmospheric bubbles should be used to suppress hard scale formation.
If the sewage project uses 0.3-0.6mm ultra-fine titanium mesh, bubbles will be trapped in the narrow mesh and unable to float up. Sludge and calcium magnesium salts will quickly fill the pores, and the mesh will completely lose its self-cleaning ability. The inner coating will be completely ineffective, and the effluent indicators will continue to exceed the standard.

Grid pore microscale redox zoning

 

There are generally residual nitrate nitrogen in the deep treatment of municipal biochemical wastewater and comprehensive chemical wastewater. Simple anodic oxidation can only degrade ammonia nitrogen, and nitrate nitrogen is difficult to remove. The flat electrode has no low potential micro area, and the total nitrogen removal effect is extremely poor. The natural potential gradient is formed inside the pores of the multi-layer stacked anode mesh: the potential near the surface of the titanium wire coating is high, which is a strong oxidation zone, generating hydroxyl radicals to mineralize COD and chromaticity;

The water in the center of the mesh is far away from the anode, with a low potential, forming a stable weak reduction microenvironment. Nitrate nitrogen can be reduced to nitrogen gas, achieving synchronous removal of COD and total nitrogen. The partition effect can only be achieved with a three-dimensional grid structure, and there are no potential gradient micro regions in the flat electrode; At the same time, the grid pores balance the local oxidation potential, avoiding the generation of excessive disinfection by-products such as chlorates and trihalomethanes due to high potential, and adapting to the high standard discharge of surface water and deep treatment of sewage.

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