China's Premier Zinc Anodes: Reliable Corrosion Protection

A zinc anode is a type of sacrificial anode used to prevent corrosion through cathodic protection. It is also classified as a galvanic anode, with the other galvanic anodes being made from aluminum or magnesium. A zinc anode’s protective properties result from a strongly negative reduction potential, which is more negative than the metal it is protecting. Oxidants, which corrode metals, will oxidize the zinc anode rather than the protected metal structure, thus preventing the structure from being corroded.

Zinc anodes are also known as zinc sacrificial anodes. 

Details About Zinc Anodes

CUSTOMISATION

Zinc anodes can be customised to fit almost any requirement in terms of shapes, sizes, chemical compositions, etc.

CURRENT CAPACITY

The average current capacity of zinc anode is 780 A.h/kg. The average closed circuit potential is -1 000 mV versus Ag/AgCl seawater.

TYPE APPROVAL

Aluminium anode meets DNVGL, BV, CCS requirements.

STANDARDS

The aluminium anodes can be provided in accordance with DNVGL-RP-B401 and MIL-DTL-24779D. Other standards can be met upon request.

APPLICATION

Zinc anodes are commonly used sacrificial anodes that keep many types of industrial equipment corrosion-free. They are used in:

  • Ship hulls
  • Water heaters
  • Pipelines
  • Distribution systems
  • Above-ground tanks
  • Underground tanks
  • Refineries

TECHNICAL PERFORMANCE

CHEMICAL COMPOSITION

What Advantages And Disadvantages Do Zinc Anodes Have ?

Like the other galvanic anodes, zinc anodes have the following advantages:

  • Require no external power source
  • Easy to install
  • Low voltage
  • Low maintenance
  • Low risk for overprotection

Disadvantages include:

  • Not working in highly resistive environments
  • Requirements for electrical isolation from other structures
  • Current capacity limitations
  • High weight
  • Potential interference with water flow
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