Mixed Metal Oxide Activated Titanium Anode For Impressed Current Cathodic Protection Hitech Engineering Materials and Systems Ltd

MMO Titanium Anodes

 Hitech EMS Ltd has available Ru-Ti-Ir, Ru-Ti-Sn and Ir-Ta Activated Titanium Anodes for Impressed Current Cathodic Protection.  Shapes available include wire, ribbon, plate, solid rod, tube, mesh and canistered.  Successfully produced since 1992 the production plant has customers throughout China, the USA, Europe, the Middle East and Asia

2001 2002 2003 2004 2005 Tube Ribbon, Tube, Sheet Spain S.E.T.A..ARGOS.A

UK Cathelco Ltd Germany SCA Spain S.E.T.A..ARGOS.

Tube, Mesh, Sheet, Canister Ribbon, Tube, Mesh, Sheet, Rod, UK Cathelco Ltd Corrpro USA Korea Wilson Walton Korea Ltd Italy A.G.E

UK Cathelco Ltd Corrpro USA Korea Wilson Walton Korea Ltd Italy A.G.E

Spain S.E.T.A..ARGOS.A

Wire, Ribbon, Tube, Mesh, Sheet, Rod, Canister UK Cathelco Ltd UK B.A.C

Korea Wilson Walton Korea Ltd America Corrpro Italy A.G.E

Spain S.E.T.A..ARGOS.A

Kuwait HOV

Recent Client List

Mixed metal oxides are formed on the titanium substrate through a process of thermal decomposition creating an oxide coating of the platinum group of metals. These oxide coatings have many superior electrochemical properties such as near metal conductivity and extremely low consumption rates.

Coating Summary

The titanium substrate usually specified is either commercially pure titanium Grade TA1 or TA2 An equivalency chart comparing the Chinese National Standard (GB3620 94) with the ASTM standard follows:

Material

Element Ti, max N, max C, max H, max Fe, max O, max Residual, max each total ASTM Gr1 balance 0.03

0.08

0.015

0.20

0.18

0.1

0.4

Gr2 balance 0.03

0.08

0.015

0.30

0.25

0.1

0.4

GB (China) TA1 balance 0.03

TA2 balance 0.05

0.10

0.015

0.25

0.10

0.015

0.30

0.20

0.25

0.1

0.1

0.4

0.4

Equivalency Chart

Type 1 2 Coating Element Application IrO 2 -RuO TiO 2 -X 2 IrO 2 -TaO 5 -X Suitable for use in sea water where Cl 2 is the principal anode product.

Suitable for use in soil, backfill, fresh water and sea water where O 2 , Cl 2 or a combination of both are discharged at the anode.

Coating Types

        Wire Ribbon Rod Tube Mesh Sheet Canister Due to the ductility of the titanium substrate, a wide range of anode shapes suitable to the structure to be protected are possible.

Anode Forms

Quality assurance and control procedures are applied strictly at all stages of production.  Raw material specification      Surface preparation Coating application Coating distribution and coating adhesion Anode/cable contact resistance Each assembled anode is Helium leak tested

Quality Assurance

      Lightweight MMO coatings demonstrate very high chemical stability even in environments with very low pH values. The coating is not affected by the generation of chlorine. Wear rate of the anode is extremely low and uniform and between 1 and 6 milligrams/ampere-year.

Anode dimensions remain nearly constant during the design life of the anode.

Operated at high current density e.g. 2000A/m2.

A superior electrically-conductive performance: 10 -7 Ω · m

Advantages of MMO Titanium Anodes

Mixed Metal Oxide(MMO) Coated species

Wire Anode Titanium Substrate

  Pure titanium wire meets ASTM standard B348 grade 1 or grade 2. Copper cored titanium wire according to customer ’ s requests.

Diameter (mm) Diameter Tolerance (mm) Titanium Copper Thickness (mm) Diameter (mm) Surface Area (m 2 ) Weight ( g/m ) 1.5

3.0

+0.15

-0.00

+0.28

-0.00

0.2

0.2

1.1

2.6

0.0047

0.0094

12.2

66.4

Wire Anode Parameters

 The coating used on wire is suitable for most cathodic protection applications, but output varies with application.

Wire Anode Coating

 Canistered anodes  Continuous horizontal ground bed  Discontinuous vertical ground bed  Above ground storage tanks  Underground storage tanks  Electrical cable shielding  Water storage tanks  Water treatment equipment

Wire Anode Application

 The wire diameter remains nearly constant during the life of the anode  Inherently stable and resilient, the titanium wire anode is easy to install  The high current density capacity has the added advantage of allowing high current overloads for initial polarization without causing harm to the anode

Wire Anode Features

Ribbon Anode

Titanium Substrate: The titanium ribbon meets ASTM standard B265 grade 1 or grade 2 Anode Coating: The coating used on ribbon is IrO2 Ta2O5-X

Width mm 6.35

Thickness mm 0.635

Length mm 152 Weight g/m Surface Area m 2 18.15

0.014

12.7

0.635

152 36.29

0.120

Ribbon Anode Parameters

Ribbon Anode

 Fine sand environments  Working environment evolution of O2 , Cl2 or a combination of both  Usually used for above ground storage tanks bottoms and reinforced concrete structures

Applications

Ribbon Anode

 Can be supplied in grid or ladder form  Easy to cut and suit for all sizes of storage tank bottoms  Uniform current distribution  Simple installation  Superior performance and a strong bond to the concrete when used in reinforced concrete application  The design lifetime can be adjusted by varying the ribbon anode spacing

Features

Solid Rod Anode

Titanium Substrate: The solid titanium rod meets ASTM standard B348 grade 1 or grade 2 Anode Coating: The coating type can be defined according to the specific environment in which the anode operates but output varies with application

Diameter (mm) 3.2

Length (mm) 1000 6.4

1000 12.7

19 1000 1000 Weight (kg) 0.036

Surface Area (m 2 ) 0.01

0.145

0.02

0.570

1.275

0.04

0.06

Rod Anode Parameters

Rod Anode

   Water condenser boxes Heat-exchangers Ground bed applications     High current output Constant electrical resistance The added advantage of allowing high current overloads for initial polarization without causing harm to the anode Also available as rod anode assemblies

Applications Features

Titanium Substrate

: Expanded titanium mesh meets ASTM standard B265 grade 1 or grade 2

Anode Coating:

Selection of the specific anode coating is based on the operating environment

Expanded Mesh Anode

Width (mm) Length (mm) Thickness (mm) Mesh size (mm) Weight (g) Surface Area (m 2 ) 32.5

1220 1 12.5

×4.5

178 0.0818

20 1000 1 12.5

×4.5

90 0.0420

Expanded Mesh Anode Parameters

      Canistered mesh anodes have been designed to replace the massive silicon iron anodes in horizontal and shallow vertical ground beds Reinforcing steel in concrete Bridge piers and surfaces Parking garages Causeways for preventing or controlling floods Docks

Expanded Mesh Anode Applications

 Lightweight and unbreakable  Canistered mesh anodes can be supplied as singles or in strings  Lower cost than silicon iron  Lower shipping cost due to lower weight

Expanded Mesh Anode Features

Titanium Substrate: Titanium tube meets ASTM standard B338 grade 1 or grade 2.

Anode Coating : Selection of the anode coating is based on operating environment.

Tubular Anode

Outer Diameter (mm) 19 25 25 25 25 31 Length Thickness Weight (mm) 1200 500 1000 1200 1500 1200 (mm) 1.0

1.5

1.5

1.5

1.5

2.0

(kg) 0.305

0.249

0.498

0.598

0747 1.020

Surface Area (m 2 ) 0.072

0.039

0.079

0.094

0.118

0.121

Tubular Anode Parameters

 Tubular anodes can be supplied as singles or in strings.

 Suitable for all natural environments e.g. soil, fresh water, sea water, mud.

 The current output depends on the anode dimensions, substrate, applications and design lifetime.

Tubular Anode Applications

 High current output and low anode/earth electrical resistance.  Tubular anodes offer savings of 15 35% over competitive anodes on an installed cost basis.

 Anode-cable assemblies are easy to handle, transport and install because of their unique flexibility.

Tubular Anode Features

Canistered anodes made in wire, tube or mesh are the perfect impressed current anode for shallow vertical and horizontal surface ground beds as well as wet , marshy soil conditions where caving is likely to occur. Ideal for protecting structures such as underground storage tanks, above ground storage tanks, pipelines.

Mixed Metal Oxide Activated Canistered Anode

Canistered Anode

Canistered Mesh Anode

Canistered Tubular Anode

        Lightweight and unbreakable Can be supplied as singles or in strings Anode cable connection completely resin encapsulated All anode/cable connections helium leak tested to ensure a perfect seal Anode/cable connections factory sealed with resin Anode/cable resistance less than 0.001 ohms 20 years life with standard coating loading Tubular anode centre or end connector giving a resistance of less than 0.001 ohms

Advantages of Canister anodes

MMO Anode Images

Half Tube Anode

Ribbon Anode

Disc Anode

Tube anode assembly

Mesh Anode

Flute Anode

Wire Anode

U Shaped Anode

Solid Rod Anode Assembly

Tubular Anode Strings

Epoxy Seal

Hitech Engineering Materials and Systems Ltd Tudor House Mews, Westgate, Grantham, NG31 6LU, UK