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Sacrificial Protection

Sacrificial Protection using Aluminium and Zinc Anodes provide cost effective solutions against corrosion. All Anodes are Cast from high grade material to ensure an even corrosion pattern, reliable electrical efficiency and long working life.

Aluminium Alloy Anodes

Alalloy anodes are cast from special aluminium alloys developed by Plusmarine. Suitably formulated for specific application, they are characterized by light weight, smooth corrosion pattern, high electrical capacity and stability. Fewer anodes may be used for a given installation compared with other materials and a substantially lower cost per installed system is achieved. Flexible Alalloy anode is extruded onto a mild steel core wire from a special patented aluminium alloy. The flexibility and light weight of this extruded anode, together with the method of clamping permits its use in applications where the use of cast block anodes may be difficult or uneconomical.

Product Range

The standard range of Alalloy anodes is listed overleaf. However, Plusmarine specializes in designing and producing anodes to meet any individual requirement and make their own moulds to do so. Thereby, they ensure both the optimum solution to each problems and total control over the quality of the finished anodes.

Applications

Alalloy anodes are suitable for a wide varity of applications including the hulls and tanks of ships, fixed off-shore structure, semi submersibles, pipelines and jetties.

Materials

Different alloy formulations are available specially designed for different applications. Alalloy anodes are cast in alloys of aluminium and indium plus additions and have been developed specially for use in sea-water. The materials are very stable in driving driving potential and efficiency even in electrolytes of varying conductivity and temperature. In normal sea-water having resistivity of about 25 ohm cm, approximately 2500 ampere hours of current are provided by each kilogram of alloy which will maintain a potential of -1100mV when measured against a silver/silver chloride reference half cell.

Chemical Composition

  • Zinc

    2.0 – 6.0%
  • Indium

    0.01 – 0.03%
  • Iron

    0.12% max
  • Silicon

    0.15% max
  • Copper

    0.006% max
  • Others (Each)

    0.02% max
  • Indium

    0.01 – 0.03%
  • Aluminium

    Remainder

ELECTROCHEMICAL PROPERTIES

NOMINAL POTENTIAL:

-1100MV, AG/AGCL

NOMINAL CAPACITY:

2500 AH/KG

Zinc Alloy Anodes

Zincalloy anodes are cast from high grade zinc alloyed to ensure an even corrosion pattern, reliable electrical efficiency and long working life.Zincalloy anodes are cast from high grade zinc alloyed to ensure an even corrosion pattern, reliable electrical efficiency and long working life.

Product Range

The standard Plusmarine's range of zincalloy anodes is listed overleaf. However, WT have the facility of designing and producing anodes to meet any individual requirement and make their own moulds to do so. Thereby, they ensure both the optimum solution to any particular problem and total control over the quality of the finished anodes.

Applications

Zincalloy anodes are particularly suitable for ballast tanks and hull of ships, jetties and subsea pipelines applications in bracelet configuration. Zincalloy anode is not suitable in high temperature environments of 50 degrees and above. Plusmarine has a special Zinc Alloy for Elevated Temperature (ET) of 50oC and above.

Materials

Zincalloy anodes are cast to U.S. Military specifications U.S. MIL A-18001 K and yield 780 ampere hours per kilogram of alloy with a solution potential of – 1050mV as measured against a silver/silver chloride reference cell.

Chemical Composition

(Normal Operating Temperature)

  • Aluminium

    0.10 – 0.50%
  • Cadmium

    0.025 – 0.07%
  • Iron

    0.005% max.
  • Copper

    0.005% max.
  • Lead

    0.006% max.
  • Others (Each)

    0.10% max.
  • Zinc

    Remainder

Chemical Composition

(Normal Operating Temperature)

  • Aluminium

    0.10 – 0.28%
  • Magnesium

    0.03 – 0.18%
  • Cadmium

    0.001% max.
  • Iron

    0.004% max.
  • Copper

    0.001% max.
  • Lead

    0.006% max.
  • Others (Each)

    0.10% max.
  • Zinc

    Remainder

ELECTROCHEMICAL PROPERTIES

NOMINAL POTENTIAL:

-1.05 V, AG/AGCL

NOMINAL CAPACITY:

780 AMPERE HOURS PER KG

  • 40C

  • per unit
  • 730
  • 11.2
  • -1.03
  • 50C

  • per unit
  • 690
  • 12.7
  • -0.97
  • 80C

  • per unit
  • 680
  • 12.7
  • -0.97

Typical Methods of Attaching Anodes For Hull and Tank Applications

Applicable to our various PMSA Anodes

External

External Hull Application

U Bolt

Attachment for internal Anodes Tank Application

E Type

Stud Attachment for Internal Anode Tank Application

Internal Z Type

Crank Weld Attachment for internal anodes Tank Application

Stand-Off Type

Attachment for internal anodes. Tank Application.

M Type

Clamp Attachment for internal Anodes. Tank Application

Clamp Type

for pitting prevention. Tank Bottom Application

Single & Double Crankweld

Attachment for internal anodes. Tank Application

Quality Assurance

For more Information

download our brochure or view our list of spare parts available for sale

Made in Singapore

Our products are proudly made in Singapore and uses only  reputable component renowned for their reliability. Our products are made to suit our customer requirements and is guaranteed to work and last!

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