Galvanic Zinc Anode Marine Cathodic Protection

Galvanic Zinc Anode Marine Cathodic Protection

3.0 USD

Anodes for ship hull, ship ballast tank, harbor installation and offshore structure, seawater cooling system, underground pipelines, tank outside etc.

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Product Attribute

Min. Order 10 Kilogram
Trade Term FOB,CIF,DDP,EXW
Payment Terms L/C, T/T, WU
Place of Origin Shaanxi, China (Mainland)
Means of Transport Ocean, Air, Land
Production Capacity 10000000 Ton/Tons per...
Packing wooden cases
Delivery Date general 20days
Brand Name TAIJIN
Brand Name: TAIJIN Zinc Anode
Type: Sacrificial anode
Zn (Min): 99.996%
Alloy Or Not: Zinc-Alloy
Diameter: customized
Surface Treatment: Bright
Certificate: CCS
Packaging Details: wooden cases
Molding technics: Pressure casting
Application: Marine ,Ship Cathodic Protection

Product Description

Galvanic Zinc Anode  Marine Cathodic Protection


Xi'an Taijin's  sacrificial Zinc Anodes are applied in Low Resistivity Soils below 1000Ω-cm and in Sea Water or produced Brines.. Zinc Anodes are widely used in bulkheads, piers and pilings, heat exchanger and condenser, pipelines, vessels and tankers. etc.

The performance of Zinc Anodes is affected by the chemical composition of the alloy, we have different alloy series to meet customer's request. Special shape, size and chemical composition anodes can be manufactured according your request.


A galvanic anode is the main component of a galvanic cathodic protection (CP) system used to protect buried or submerged metal structures from corrosion.

They are made from a metal alloy with a more "active" voltage (more negative reduction potential / more positive electrochemical potential) than the metal of the structure. The difference in potential between the two metals means that the galvanic anode corrodes, so that the anode material is consumed in preference to the structure.

The loss (or sacrifice) of the anode material gives rise to the alternative name of sacrificial anode.


Zinc Alloys Chemical Composition:

 

Elements

ASTM B418 TYPE I

MIL A -18001K

ASTM B418 TYPE II

Aluminum

0.01- 0.50

0.005 max

Cadmium

0.025-0.07

0.003 max

Lead

0.006 max

0.003 max

Copper

0.005 max


Iron

0.005 max

0.0014 max

Others(each)

0.02 max


Total others

0.05max


Zinc

Remainder

Remainder


Phsical Characteristics:  

TermSpecification
Tensile strength M pa115±10
Elongation %45±5
melting point419
Density g/m37.14

The Electrochemical Properties

Open Circuit Potential/VOperating Potential/VCurrent Capacity/ (Ah/kg)Current Efficiency/ %Romsumption Rate/ kg. (A. a)-1Dissolving Pattern
-1.18~-1.10-1.12~-1.05≥ 2400≥ 85≤ 3.65Dissolves uniformly


Features: 

  • Long lasting shine

  • Startling design

  • Rust resistance

  • High purity


Applications:


• Hulls of ships, barges, boats and tugs

• Ballast tanks of tankers, ore carriers and freighters

• Bulkheads

• Piers and Pilings

• Pipelines

• Heat Exchangers


Cost effectiveness

As the anode materials used are generally more costly than iron, using this method to protect ferrous metal structures may not appear to be particularly cost effective. However, consideration should also be given to the costs incurred by removing a ship from the water, for example, to repair a corroded hull or to replace a steel pipeline or tank because their structural integrity has been compromised by corrosion.

However, there is a limit to the cost effectiveness of a galvanic system. On larger structures, or long pipelines, so many anodes may be needed that it would be more cost-effective to install impressed current cathodic protection.


Related Links

Category: Sacrificial Anode