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Product
Cathodic Protection
Release time:2012-4-19 21:26:55  Clicks:14
MMO Ribbon Anode 
                                 
 
MMO Ribbon Anode consists of solid titanium Ribbon that have been coated with Mixed Metal Oxide coating.
General
Commodity
MMO Ribbon Anode&Titanium Conductor Bar
Application
Under Ground Storage Tank,Above Ground Storage Tank.
Anode Dimension &Properties
Width
6.35mm(0.25’’)
12.7mm(0.50’’)
Thickness
0.635mm(0.025’’)
0.635mm(0.025’’)
Standard Coil Length
100m
100m
Standard Coil Weight
1.82kg
3.64kg
Surface Area of Ribbon
0.014 m2 per/m
0.028 m2 per/m
Operating Characteristics
Fine Sand
Current output
42mA per m(12.8mA/ft)*
84mA per m(25.6mA/ft)*
Expected life
20 years
20 years
Concrete
Current output
1.5mA per m(0.45mA/ft)**
3.0mA per m(0.90mA/ft)**
Expected life
20 years
20 years
Titanium Conductor Bar Dimensions
Width
12.7mm(0.50’’)
Thickness
0.9mm(0.035’’)
Standard Coil Length
100m
Standard Coil Weight
5.15kg
*When operating at an anode current density of 3A/m2(0.278A/ft2)
** When operating at an anode current density of 110mA/m2(10.19A/ft2)

MMO Tubular Anode

MMO Tubular anode are made using tubular titanium substrates,which are coated with a mixed metal oxide catalyst.

Chemical Composition
Substrate
Catalyst
ASTM B 338 Gr 1 Titanium
Mixed Metal Oxide
Anode Dimension &Properties
Diameter(mm)
Length(mm)
Current Rating*(A)
Expected life(Y)
16
500
2.5
20
16
1000
5.0
20
19
1000
6.0
20
25
500
3.9
20
25
1000
7.8
20
32
1200
12.0
20
*Based on 20-year design life in calcined petroleum grade coke

Typical Application such as offshore platforms,deep groundbeds,pipelines.or used for other special application.
 
MMO Wire Anode
                        
MMO Wire Anode consists of solid titanium wire that have been coated with Mixed Metal Oxide coating.
 
The Wire Anodes Can be manufactured in barious forms to suit the intended application:
l         Long lengths of MMO Wire connected at regular intervals to a header cable.
2       With the anode encased within a cotton bag filled with coke backfill.
General
Commodity
MMO/Ti Wire Anode
Application
Under Tank protection,Close anode systems for pipelines,Internal Tank Protection
Anode Dimension &Properties
Diameter
3mm
1.5mm
Surface Area per Unit Length
9.5×10-3m2/m
4.75×10-3m2/m
Composition
IrO2 and Ta2O5 Based Mixed Metal Oxide
IrO2 and Ta2O5 Based Mixed Metal Oxide
Current Output
In Carbonaceous backfill
In petroleum coke backfill
In fresh water or seawater
 
0.5A/m
1.0A/m
5.6A/m
 
0.25A/m
0.5A/m
2.8A/m
Expected Life
20 Years
20 Years
Substrate
Composition
Pure Titanium Wire or Titanium Clad Copper wire
Standard
ASTM B348 Grade 1 or 2
*MMO Wire anode are available in two standard size.Other sizes and rating are available upon  request.
.
MMO Ribbon Mesh Anode
 
 
MMO Ribbon Mesh anode are made using expanded titanium mesh,which are coated with a mixed metal oxide catalyst
 
Anode Dimension &Properties
Size
Thickness
Current rating*
Mesh Diamond
Weight/Roll
Surface Area(m2)
10mmx76m
1.3mm
2.8mA/m
2.5 x4.6 x0.6mm
1.4kg(3.1 lbs)
1.85
13mmx76m
1.3mm
3.5mA/m
2.5 x4.6 x0.6mm
1.8kg(4 lbs)
2.4
19mmx76m
1.3mm
5.28mA/m
2.5 x4.6 x 0.6mm
2.7kg(4 lbs)
3.6
1220mm x76m
1.98mm
37.8mA/m
25 x50 x0.89mm
43kg(95 lbs)
92.9
1220mmx76m
1.98mm
24.4mA/m
34x76 x0.89mm
33kg(95 lbs)
92.9
*Anode rating for 110mA/m2 FHWA limits.
**Based on 75-year design life in concrete reinforced stuctures.
Additional output versions may be available utilizing different Mixed Metal Oxide coating loading.
 
Application MMO Ribbon Mesh Anode is typically used in concrete application.The ribbn mesh field assembled with a titanium conductor bar,and a resistance welder.The design life varies with operating current.
 
Titanium Conductor Bar Dimensions
Width
12.7mm(0.50’’)
Thickness
0.9mm(0.035’’)
Standard Coil Length
100m
Standard Coil Weight
5.15kg

 MMO Probe Anode

       

Impressed Current Probe Anode
 
Howah Probe Anode are an effective solution when there is a need to protect the internal surfaces of a structure, such as a condenser water box, process tank, pressure vessel, intake/ discharge piping, or similar. Available in a wide variety of sizes,
 
Anode Materials
 
The anode element is available in a number of material choices including:
 l        Platinized niobium*
2        Platinized titanium*
3        Mixed metal oxide (MMO)**
* Platinum thickness can vary from 1.0 to 20 microns.
 

Rod Dia. (mm)
Rod Length (mm)
Output (amps)
Minimum Life (years)
9.5(3/8")
2
3
0.7
1.1
25
25
12.7(1/2")
2
3
1.0
1.5
25
25
19.0(3/4")
2
3
1.5
2.2
25
25
  • This table is for estimating purposes only. Actual values will vary upon site conditions.
  • Output and life can be increased upon request.
  • Output and life estimates are based upon mixed metal oxide (MMO) or platinum anodes in seawater (35 ohm-cm).
  • Life will be half of the above listed outputs in brackish water (200 ohm-cm).

MMO Disc Anode

Howah MMO Disc Anode was developed specifically for the rigors of cathodically protecting dam and navigation lock gates. Since our disk anodes are designed to operate in fresh, brackish and seawater environments,other suitable applications include: marine structures,water tanks, and vessels. With an optional primary seal spacer gasket, it can be used on the inside of pipes,tanks, or other curved surfaces.

Availability:
         Platinized or MMO coated surface.
         Titanium or Niobium surface.
         Full resilient mount in glass reinforced epoxy or polyurethane.
         Disc anodes are available from 5 IN to 12 IN.
         Strip anodes are available 2 to 6" wide and 6 to 52" long.
         Special size (elliptical) anodes also manufactured as per customer's requirements.
 
The standard disc anode consists of a solid titanium disc that have been coated with MMO coating.

Disc Anode
Model
Anode Diameter
(mm)
Current Rating
(A)
φ25mm
φ60mm
φ100mm
φ150mm
25
60
100
150
0.3
1.7
4.7
10.6
*Current density should be determined in accordance with fresh water resistivity.Customized sizes and rating are available upon request.            

 
MMO Canister Anode
 
 
Impressed current cathodic protection anodes are available in optional metal canisters for installation where conventional hole loading methods may not be practical. Howah anode canister assemblies are made from galvanized steel tube. The assembly includes calcined petroleum coke breeze backfill
(several choices are available), an anode centering device,galvanized steel end plugs,and a lifting bail to ease installation.
 
Type of impressed current anode
 
 MMO Tubular Anode
 MMO Wire Anode

MMO Canister Anode Dimension &Properties
MMO Tubular Anode
Tubular Size
Current Rating
Canister Size
16X500mm
2.5A
75X700mm
19X1000mm
6.0A
100X1500mm
25X1000mm
8.0A
150X2000mm
32X1200mm
12.0A
203X2133mm
                MMO Wire Anode
Tubular Size
Current Rating
Canister Size
1.5X1000mm
0.5A
100X1500mm
3.0X1000mm
1.0A
150X2000mm
3.0X1500mm
1.5A
203X2133mm
* Customized sizes and rating are available upon request.

                                 
Tel:+86-29-89195306 Fax:+86-29-89195316
Address:No.10,Fengcheng 2nd Road,Weiyang District,Xi'an,China
Email:info@howahmetal.com Technical support:network flow