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Product Description:
Zinc anodes for boats are 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. Zinc anodes' 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.
Like the other galvanic anodes, zinc anodes have the following advantages:
Application of Zinc anodes for boats
Technical Parameter
Chemical Composition
| Element | Grade ASTM B418 | Grade ASTM B418 |
| Type 1 | Type 2 | |
| Iron | 0.005% Max. | 0.0014% Max. |
| Lead | 0.006% Max. | 0.003% Max. |
| Copper | 0.005% Max. | 0.002% Max. |
| Aluminum | 0.1 - 0.5% | 0.005% Max. |
| Cadmium | 0.025 - 0.07% | 0.003% Max. |
| Other Each | 0.05% Max. | -- |
| Others Total | 0.30% Max. | 0.30% Max. |
| Zinc | Remainder | Remainder |
Electrochemical Performance
| Performance | Open circuit potential-V(SCE) | Working potential-V(SCE) | Actual capacity A·h/kg | Current efficiency% | Dissolution condition |
| In seawater | -1.09~-1.05 | -1.05~-1.00 | ≥780 | ≥95 | Corrosion products are easy to fall off and the surface dissolves evenly |
| In the soil | ≤-1.05 | ≤-1.03 | ≥530 | ≥65 | |
| Remark 1:Reference electrode - saturated calomel electrodeRemark 2:Medium - The seawater medium uses artificial seawater, the soil medium uses moist soil, and a filler is added around the anode. |
