Circulating Water System Aluminum Anode | Aluminum Alloy Sacrificial Anode Price

Aluminum alloy sacrificial anodes are suitable for the cathodic protection of metals against corrosion in seawater media for ships, mechanical equipment, marine engineering, port facilities, as well as pipelines, cables, and other facilities in seabed mud.
Zinc alloy sacrificial anodes offer good self-dissolution, high current efficiency, and excellent self-regulating performance of the anode current.
They are suitable for the cathodic protection of metals against corrosion in seawater and freshwater media for ships, mechanical equipment, marine engineering, port facilities, as well as pipelines, cables, and other facilities in low-resistivity soil.

High-efficiency aluminum sacrificial anodes are mostly used for the anodic protection of metal structures in seawater environments or the bottom plates of crude oil storage tanks and cannot be used in soil environments with low chloride ion content. Their electrode potential is -1.05V CSE. When the temperature exceeds 49°C, the electrical capacity decreases with increasing temperature. However, high-efficiency aluminum anodes can be used in soil environments with low chloride ion content.

Potassium, calcium, sodium, magnesium, aluminum, zinc, iron, tin, lead, copper, mercury, silver, platinum, gold—this is the metal activity series. From this, you can see that aluminum is more metallic than zinc. Therefore, in a galvanic cell where the same material serves as the cathode and aluminum or zinc serves as the anode, aluminum has a stronger ability to lose electrons than zinc, meaning aluminum has stronger reducing properties than zinc. In industry or daily life, the metal to be protected is usually iron, and both aluminum and zinc can serve a protective role.

Due to aluminum's stronger chemical activity compared to zinc, aluminum anodes have a more negative protection potential, and the unit mass electrical capacity of aluminum anodes is higher than that of zinc electrodes. Generally speaking, aluminum anodes are suitable for media with lower resistivity, while zinc anodes are suitable for media with higher resistivity. Additionally, zinc anodes have higher current efficiency than aluminum anodes. Currently, zinc anodes are used in seawater media, aluminum anodes are used in freshwater media, and magnesium anodes are used in soil.

Aluminum alloy is made by adding some alloying elements to pure aluminum, such as aluminum-manganese alloy, aluminum-copper alloy, aluminum-copper-magnesium hard aluminum alloy, and aluminum-zinc-magnesium-copper super hard aluminum alloy. Aluminum alloy has better physical and mechanical properties than pure aluminum: easy processing, high durability, wide applicability, decorative effects, and rich patterns. Aluminum alloys are categorized into rust-proof aluminum, hard aluminum, super hard aluminum, etc., each with its own application range and code for user selection.
Aluminum alloys retain the characteristic of being lightweight but exhibit significantly improved mechanical properties. The applications of aluminum alloy materials fall into three categories: first, as load-bearing components; second, as materials for doors, windows, pipes, covers, and shells; third, as decorative and thermal insulation materials. Utilizing the characteristic of aluminum alloys being colorable after anodizing, various decorative items can be produced. Aluminum alloy sheets and profiles can undergo secondary processing such as anti-corrosion treatment, embossing, coating, and printing to produce various decorative sheets and profiles for use as decorative materials.