Zinc based anodes are widely used for shipping applications, they are also used for offshore structures but their higher density can lead to weight limitations. Zinc anodes do not require a chloride environment to operate and can be used in brackish and fresh water applications and onshore with resistivity up to 30 Ohm*m.
Our Zinc anodes are subject of National and/or International Patents. The different compositions are intended to optimize specific performance properties.
The electrochemical properties for zinc based alloys will vary depending on the specific alloy composition and the operating environment.
Generally, zinc alloys are only applicable at temperatures up to 50 °C. Above this temperature, zinc alloys can suffer from inter-granular corrosion, especially when buried in saline mud. Sychem develop a Zinc alloy that can operate successfully at higher temperatures up to 85 °C. Anodes offer as pre-packed for onshore Cathodic protection or AC Mitigation.
Typical Application
Marine
Oil & Gas
Port & Harbors
Offshore wind farms
Chemical Composition
| Element | US Mil 18001 | ASTM B418, Type II | High temp Alloy 60-80OC |
| Aluminum | 0.1-0.5% | <0.005% | 0.10-0.25% |
| Cadmium | 0.025-0.07% | <0.003% | <0.001% |
| Iron | <0.005% | <0.014% | <0.002% |
| Copper | <0.005% | <0.002% | <0.001% |
| Pb | <0.006% | <0.003% | <0.006% |
| Mg | – | – | 0.05-0.15% |
| Other single | <0.02% | <0.001% | <0.02% |
| Total Others | <0.10% | <0.005% | <0.10% |
| Zinc | Balance | Balance | Balance |
| Electrochemical characteristics | |||
| Capacity min | 780 Ahr/Kg | 760 Ahr/Kg | 690 Ahr/Kg |
| Closed circuit potential (Ag/AgCl) | -1.03V | -1.00V | -0.97V |
| Consumption rate | 11.2Kg/year | 11.5Kg/year | 12.7Kg/year |
FEATURES
Anode type: XXXXXXXXXX
Dimensions: length __ Width __ Height __ mm
Anode Weight: __._ Kg
Steel core
- Pipe
- Plate
- Rod
Specification
- GB/T 700 grade Q235
- GB/T 8162 #20
Carbon Equivalent (CE): 0.4
Dimensions: OD __mm Length ____mm
Weight: __._ Kg
Hole support
Epoxy Coating
- DFT 100microns
- DFT300Microns
Cable
Length: 10m
Cross section
- 6sqmm
- 10sqmm
- 16sqmm
- 25sqmm
Insulation/Sheathing
- PVC/PVC
- XLPE/PVC
- HMWPE
Backfill
- Gypsum 75%, Bentonite 20%, Sodium Sulphate 5%
- Bentonite 100%
Bag: Cotton
Cable Steel connection
- Copper crimp link
- Brazing
Insulation material between Cable anode: Epoxy Resin/heat shrink
Pre-packed Dimensions: ____mm Length,___mm Width.___mm Weight __._kg
Shape
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| Tapered, weld half shell bracelet anode Type BTW | Square, Bolted half shell bracelet anode Type BSB | Square segment , Welded half shell bracelet anode Type BSG |
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| Tapered, Bolted half shell bracelet anode Type BTB | Square, hinged and bolted half shell bracelet anode Type BSH | Square, Welded half shell bracelet anode Type BSW |
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| Trapezoidal anode flush mounted type flat bar | Trapezoidal anode stand off type with double crank flat bar | Pre-packed anode with cable lead |
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| Trapezoidal anode with tubular insert protruding from doth ends Type SOS |
Trapezoidal anode with “cowhorn” tubular insert protruding from back face Type SOB |
Trapezoidal anode with “cowhorn” tubular insert protruding from both ends Type SOE |
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