MMO Ru-Ir Coating Titanium Anode For Chlor-alkali Industry

The expanded Metal Anode is a device with high conductivity and corrosion resistance for use as anodes in electrolysis. They are made by coating a substrate, such as a pure titanium plate or expanded mesh, with several kinds of metal oxides. One oxide is usually RuO2, IrO2, or PtO2, which conducts electricity and catalyzes the desired reaction such as the production of chlorine gas.

Caustic soda is manufactured through the electrolysis of sodium chloride (salt brine), Chloride ions are oxidized at the anode to produce chlorine gas, and hydrogen and caustic soda are produced by the cathode reaction.
The use of our MMO coating electrode in the production of Chlor-alkali has the advantages of small loss, significantly reduced chlorine evolution potential, and stable size and shape compared with graphite electrodes. Compared with graphite electrodes, under the same electrolytic environment, the product has high quality, low energy consumption, and high purity of chlorine gas.
In all the methods chlorine (Cl2) is produced at the positive electrode ( anode ) and the hydrogen (H2) and Sodium Hydroxide ( NaOH or caustic soda ) are produced directly or indirectly at the negative electrode ( cathode ). Membrane or Diaphragm or Mercury is used to separate the anode products from the cathode products according to the process adopted.

The reaction is :
2NaCl + 2H2O = Cl2 + H2 + 2NaOH

MMO Titanium Anode Advantages

• Increased throughput with reduced plating times
• Significantly reduced chlorine evolution potential
• Compared with graphite electrodes, low consumption, and high purity of chlorine gas
• Excellent adherence properties with proper surface preparation 
• Lightweight and Energy savings
• Outstanding mechanical strength (Anti-ravel and Flexible)
• Outstanding chemical resistance to highly acidic conditions – typical for oxygen and chlorine evolving environments common in many cathodic protection applications 

Application Field

1. Electrolysis of Water
2. Electrolytic Metallurgy
3. Organic Synthesis
4. Sewage treatment plants
5. Electrosynthesis/chlorate and perchlorate production
6. Electroplating Industry

Process Scheme

 Terminology

• SWD: Short Way of Diamond        LWD: Long Way of Diamond

• SWO: Short Way of Opening          LWO: Long Way of Opening

• Flattened Expanded Metal V.S Standard Expanded Metal

1.1 Expanded Metal Terminology:

1.1.1 bond, n-the solid intersection of two strands.

1.1.2 camber, n-the bow of a side or edge from end to end from a straight line.

1.1.3 diamonds, n-open area of metal after expanding.

Most expanded metal open areas or patterns are uniform diamond-shaped, but may also be hexagonal, louvered, asymmetric, square, or other shapes, or combinations thereof.

1.1.4 edge configuration, n-refers to the edge condition of a sheet may they be closed diamonds (bonded), or open diamonds (random) produced by shearing.

1.1.5 expanded metal, n-a rigid sheet of metal that is simultaneously been slit and stretched creating an open diamond pattern.

1.1.6 flattened, v (F)-expanded metal that has been cold rolled after expansion.

1.1.7 flattening, adv-the process of producing flattened expanded metal.

1.1.8 grating, n-expanded metal that is produced from heavier sheets.

1.1.9 levelness, n-(flatness of sheet), sheets shall be free from waves or buckets that are in excess of 1–1/2 in. from a plane surface.

1.1.10 LWD, n-nominal dimension, Long Way of the Diamond.

1.1.11 LWO, n-Long Way of the Opening.

1.1.12 regular-raised-standard, n-(R) expanded metal as it comes from the press. The strands and bonds are set at a uniform angle to the plane of the sheet.

1.1.13 SWD, n-nominal dimension, Short Way of the Diamond.

1.1.14 SWO, n-Short Way of the Opening.

1.1.15 shearing, n-cutting the sheet to a specific size or tolerance.

1.1.16 squareness, n-the dimensional variance a side and edge are out of square.

1.1.17 strand thickness, n-thickness of the base metal.

1.1.18 strand thickness, n, and strand width, n-can be varied to create different expanded metal products for different applications.

1.1.19 strand width, n-amount of material fed through top and bottom dies to produce one strand.

1.1.20 taper, n-edges of a sheet that deviates from parallel

Titanium Anode Packing & Shipping

How to calculate the weight of expanded metal?

Please check our special expanded metal weight calculator.

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Popular Size

Applications

1. Cathodic Protection and Electroplating and cathodic protection
2. Electrolysis of Water
3. Electrolytic Metallurgy
4. Organic Synthesis
5. Sewage treatment plants
6. Electrosynthesis/chlorate and perchlorate production
7. Electroplating Industry

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How to order MMO Ru-Ir coating titanium anode for the chlor-alkali industry?

Please Specify:

• Material: Titanium, Gr1, Gr2, etc.
• Type: Standard/Raised, Flattened
• Quantity: number of pieces – full size or cut pieces required
• Piece Size: width (SWD) x length (LWD)
• Shearing: bond or random. Please check the below photo for reference
• Finish: Pt coating, special, if any

Item No.: typically expanded metal is specified like the following examples:

1/8 #23 S 3′ SWD x 6′ LWD Titanium Gr 1

• – 1/8 inch= Short Way Of Diamond Dimension
• – #23 = Gauge (Usually not AWG, BWG, SWG, should be Washburn & Moen)
• – “S” = Standard (“F” would indicate flattened)
• – 3′ SWD x 6′ LWD = size of sheet width x length
• – Titanium Gr 1 = material

The Best Wire Gauge Chart

You may also provide us the plate thickness in mm

Shearing Type

Expanded Metal Mesh Direction