Boats Use Zinc anodes

Description

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:

• Require no external power source
• Easy to install
• Low voltage
• Low maintenance
• Low risk for over-protection

Application of Zinc anodes for boats

• Ship hulls
• Ballast tanks
• Sea chests
• Engine rooms
• Pipelines
• Piers
• Docks
• Buoys

 

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 electrode Remark 2:Medium – The seawater medium uses artificial seawater, the soil medium uses moist soil, and a filler is added around the anode.