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Quality. Ingenuity. Reliability.

For over 40 years Sea Shield Marine has been the trusted name for Service Divers, Pleasure Craft Owners, and Cathodic Protection Professionals all over the World that demand High-Quality, Durable, and Reliable Zinc Anodes. Our experienced teams dedication to quality and proprietary manufacturing assures you’ll always receive the Worlds Best Zinc Anodes – but it’s our unmatched ingenuity that has allowed us to make our mark as a Cathodic Protection Industry leader. All Sea Shield Marine Anodes are made to MIL-SPEC standards MIL-A-18001 Zinc Anodes and MIL-A-24779 Aluminum Anodes, are pressure die cast, and are engineered for longevity. We manufacture and/or carry Zinc Anodes, Aluminum Anodes, and Magnesium Anodes for boats, yachts, commercial vessels, pleasure craft, or any of your cathodic protection needs – Insist on Quality, Insist on Sea Shield Marine! Proudly Made in the USA and Veteran-Owned.

Manufactured to Mil-Spec Standards

Zinc anodes: Mil-A-18001
Aluminum anodes: Mil-A-24779

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Important Product Information:

While we work to ensure that product information is correct, actual product weight may slightly vary. For additional information about a product, please contact us directly.

Sea Shield zinc anodes conform to MIL-A-18001

Quantitative analysis is as follows
LEAD: (Max.) 0.006%
IRON: (Max.) 0.005%
CADMIUM: (Min.-Max.) 0.025% – 0.070%
ALUMINUM: (Min.-Max.) 0.10% – 0.50%
COPPER: (Max.) 0.005%
ZINC: Remaining Balance

Sea Shield aluminum anodes conform to MIL-A-24779

Quantitative analysis is as follows:
INDIUM: (Min.-Max.) 0.014% – 0.020%
ZINC: (Min.-Max.) 4.00% – 6.50%
SILICON: (Min.-Max.) 0.080% – 0.20%
COPPER: (Max.) 0.004%
MERCURY: (Max.) 0.001%
TIN: (Max.) 0.001%
OTHERS: (Max. each not to exceed 0.10% total) 0.020%
ALUMINUM: Remaining Balance