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Shandong Dongying Aluminum-Zinc-Indium-Magnesium-Titanium Sacrificial Anodes
Generally, zinc blocks are embedded in the hulls of seagoing vessels. Since the hulls are made of steel, steel will undergo electrochemical reactions in seawater, corroding the hull. Zinc is more reactive than iron. In seawater, zinc will react before iron. Zinc loses electrons and is corroded, while iron is protected from corrosion, thus protecting the hull. In this reaction, zinc acts as the anode, losing electrons and being corroded, while iron acts as the cathode and is protected. This is the so-called cathodic protection method of sacrificial anodes.
Methods/Steps
1. It should have a low self-corrosion rate and uniform corrosion, and a high and stable current efficiency.
2. It should have a high electrochemical equivalent, that is, a large amount of current is generated per unit weight.
3. During operation, the anodic polarization should be small, the dissolution should be uniform, and the products should be easy to fall off.
4. It should have a sufficiently negative and stable potential.
5. The corrosion products should not pollute the environment and be harmless.
6. The materials should be widely available, easy to process, and inexpensive.
It is suitable for the cathodic protection of metals in ships, mechanical equipment, marine engineering and port facilities in seawater and fresh water media, as well as in pipelines, cables and other facilities in low-resistivity soil.
The metal of the cathode can never be corroded.
Aluminum alloy sacrificial anodes are suitable for the cathodic protection of metals in ships, mechanical equipment, marine engineering and port facilities in seawater media, as well as in pipelines, cables and other facilities in sea mud.
What is an anode?
Sacrificial anodes protect the cathode. Here, it refers to adding a more active metal. When a galvanic cell is formed, the more active metal preferentially acts as the negative electrode, losing electrons to form cations, thus protecting the original metal.
Aluminum alloy sacrificial anodes have extremely high electrochemical performance. The power generation of anode materials per unit weight is large, about three times that of zinc anodes and twice that of magnesium anodes. For example, when a Zn plate is added under the ship, in seawater as the electrolyte solution, Zn reacts preferentially to protect Fe. In seawater and other media containing chloride ions, it has good performance and strong self-adjusting ability to generate current.
Zinc alloy sacrificial anodes have good self-solubility, high current efficiency, and good self-adjusting performance for the current generated by the anode.
Aluminum Alloy Sacrificial Anodes
Commonly used aluminum alloy anodes are Al - Zn - In series and Al - Zn - Hg series anodes, which are suitable for the cathodic protection of structures such as ships, port works and marine facilities in seawater, seawater cooling water systems, and the sediment water part of storage tanks. The production of aluminum alloy anodes complies with GB4948 - 2002 "Aluminum-Zinc-Indium Series Alloy Sacrificial Anodes".
The performance of aluminum anodes is affected by the chemical composition of the alloy. We offer different alloy compositions to meet customers' requirements. We can also manufacture anodes with special specifications and chemical compositions according to customers' requirements.
The aluminum anodes provided by Jiaozuo Libo Light Alloy Co., Ltd. can prevent the corrosion of steel structures in seawater and are widely used for anti-corrosion of ship hulls, ballast tanks, seawater pipelines, port and dock facilities, marine engineering, drilling platforms, condensers, and pipelines in soil media. Commonly used aluminum alloy anodes include Al - Zn - In series and Al - Zn - Hg series anodes, which are suitable for the cathodic protection of structures such as ships, port and marine facilities, seawater cooling water systems, and sediment water parts of storage tanks in seawater. The production of aluminum alloy anodes complies with GB4948 - 2002 "Sacrificial Anodes of Aluminum - Zinc - Indium Series Alloys".
The performance of aluminum anodes is affected by the chemical composition of the alloy. We offer different alloy compositions to meet customers' requirements. We can also manufacture anodes with special specifications and chemical compositions according to customers' requirements.
Casting holes are allowed on the working surface of the sacrificial anode, but their depth shall not exceed 10% of the anode thickness, and the maximum depth shall not exceed 10mm. 8.4 The working surface of the sacrificial anode shall be kept clean and free from paint, oil, etc. 9 Iron feet 9.1 Plate - shaped iron feet are made of carbon structural steel bars. The composition and dimensions of the steel plates shall comply with the provisions of GB/T 700. 9.2 Steel pipe iron feet are made of seamless steel pipes. The dimensions of the steel pipe composition shall comply with the provisions of GB/T 17395. 9.3 Threaded steel iron feet are made of crescent - shaped steel bars. The composition, dimensions, and shape of the steel bars shall comply with the provisions of GB 1499. 9.4 Round steel iron feet are made of steel bars. The composition and dimensions of the steel bars shall comply with the provisions of GB 1499. 9.5 Surface treatment The surface of the iron feet shall be clean and rust - free and shall be galvanized or sand - blasted. The quality of the galvanized layer shall comply with the provisions of GB/T 3764. 9.6 Contact resistance between the sacrificial anode and the iron feet The contact resistance between the sacrificial anode and the iron feet shall not be greater than 0.001 ohm. The aluminum anodes provided by Jiaozuo Libo Light Alloy Co., Ltd. can prevent the corrosion of steel structures in seawater and are widely used for anti - corrosion of ship hulls, ballast tanks, seawater pipelines, port and dock facilities, marine engineering, drilling platforms, condensers, and pipelines in soil media. Commonly used aluminum alloy anodes include Al - Zn - In series and Al - Zn - Hg series anodes, which are suitable for the cathodic protection of structures such as ships, port and marine facilities, seawater cooling water systems, and sediment water parts of storage tanks in seawater.
The production of aluminum alloy anodes complies with GB4948 - 2002 "Sacrificial Anodes of Aluminum - Zinc - Indium Series Alloys".
The performance of aluminum anodes is affected by the chemical composition of the alloy. We offer different alloy compositions to meet the requirements of customers. We can also manufacture anodes with special - specification chemical compositions according to customer requirements.
Jiaozuo Libo Light Alloy Co., Ltd. can also design and produce various aluminum alloy sacrificial anodes with special specifications and performances according to different customer needs.
Specifications: 16kg, 22kg, 23kg, 35kg, 50kg, 85kg, 120kg, 131kg, 180kg
After - sales service:
We can provide free telephone technical guidance or on - site technical guidance and seriously handle each of your feedbacks.
The company's main products include:
☆Magnesium alloy sacrificial anode series: Magnesium - manganese alloy sacrificial anode, bracelet - type magnesium alloy sacrificial anode, magnesium alloy semi - continuous cast rods, magnesium alloy plates
☆Aluminum alloy sacrificial anode series: Ordinary aluminum alloy sacrificial anode, high - efficiency aluminum alloy sacrificial anode, highly activated aluminum alloy sacrificial anode, bracelet - type aluminum alloy sacrificial anode
Based on the electrode kinetics after the coupling of sacrificial anodes and carbon steel, the time - integrated charge value of the galvanic current is the actual current output of the sacrificial anode. By testing the galvanic current Ig after the coupling of cast aluminum alloy sacrificial anodes and carbon steel in a 3.5% NaCl solution, it shows that the method of quickly evaluating the performance of as - cast aluminum alloy sacrificial anodes using the galvanic current is feasible, and the test time is 20min. The galvanic current method is used to quickly screen aluminum alloy sacrificial anodes in oil - containing saltwater, and the better formulations are tested by referring to the impressed current method. The results show that in oil - containing saltwater, the performance of sacrificial anodes decreases. The performance of sacrificial anodes with better performance has little difference in the two media, and the following are screened out
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