Diversified Products - Zinc Caps and Anodes


MARS Zinc Caps and Zinc Anodes
MARS Zinc Caps and Zinc Anodes

Submerged in concentrated salt water for 5,000 hours.

MARS Zinc Caps and Anodes

Corrosion Is Expensive, Protect Your Investment! 
A Common Sense Approach To Corrosion Control

Save Downtime And High Repair Cost.

Understanding Corrosion

Corrosion is the result of electrochemical activity ... galvanic action. Scientific studies have proven that metals having a higher electrical potential will corrode and degrade in a typical corrosion cell, while protecting other metals having a slower electrical potential. Of all metals, Zinc has the highest electrical potential.

Common Types of Corrosion

The most common type of corrosion cell is a simple Battery. The outer case is made of a zinc alloy having a negative charge ... the anode. The center post is a carbon rod having a positive charge ... the cathode. Separating the two is a filler ... the electrolyte. In operation, the positive current charge rushes from the zinc anode to the cathode, causing eventual pitting of the zinc case. As the electrochemical activity stabilizes, the battery loses strength. The aggressive nature of the electrolyte determines the current output and the life of the battery.

Effects on Utilities

The same phenomenon occurs in submerged water and gas mains. The pipes and fittings are buried in an electrolyte ... the moist soil. The unprotected lines and fittings ... the cathode ... have a positive charge and the current generated is discharged directly into the soil in the electrochemical process of corrosion. Corrosion failures of water and gas mains are directly related to the failure of either the bolt/nut combination, or the flanges secured by the combination. By adding a sacrificial metal. .. zinc caps ... the natural current flow is altered, flowing from the anode ... (the zinc caps) ... to the cathode ... (the pipe and fittings), through the electrolyte ... (the moist soil) ... and preventing corrosion.


Standard Specifications

Specifications are subject to change at any time.  Please contact MARS for the latest specifications.

MARS Zinc Caps and Anodes

-  Zinc anode caps should be used on:
     - Buried or submerged pipeline fittings
     - Valves
     - Flanges
     - Bolts
     - Couplings
     - Hydrants

-  2.5 oz Hex Thread Size: 1/2”, 3/8”, 5/8”, 3/4”

-  2.5 oz Tapered Thread Size: 5/16”, 3/8”, 1/2”, 7/16”

-  6 oz Octagon Thread Size: 1/2”, 5/8”, 3/4”, 7/8”, 1”, 1 1/8”

-  14 oz Octagon Thread Size: 1 1/8”, 1 1/4”, 1 1/2”, 1 3/4”

Proudly Made in the USA

Looking for more?

Contact our Diversified Products team for additional products or specifications.

Available Downloads:

MARS-Datasheet-DP-ZincCaps.pdf
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17/10/2018 00:00:00