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Help CenterAnti-corrosion Aluminum-zinc-indium-magnesium-titanium Sacrificial Anodes for Steel Pile Wharves
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Anti-corrosion aluminum-zinc-indium-magnesium-titanium sacrificial anodes for steel pile wharfs
According to the conditions of the inner wall medium, the anodes can be selected from aluminum alloy anodes or magnesium alloy anodes. When using sacrificial anode protection for the inner wall, attention should be paid to the influence of temperature. In the water medium environment of 40~70℃, magnesium anodes are not applicable due to their too high corrosion rate.
Calculate the required number of anodes according to the protected area, protection period and medium resistivity, and select the anode specifications and shapes. The anodes are evenly distributed in a ring shape on the tank bottom plate, and the anode support is welded to the bottom plate. Sacrificial anodes are easy to install, and when the anode is consumed to 85% of its initial weight, it can be replaced during the tank cleaning opportunity.
Alloy sacrificial anodes are mainly used in anti-corrosion of offshore engineering. These anodes can work effectively in relatively pure seawater with high-speed flow. Therefore, as long as the appropriate alloy is selected, the passivation phenomenon rarely occurs. They are light in weight and are particularly suitable for the use requirements of 20 - 30 years.
Execution standard:
U.S.Mil-A-18001K/W / GB4948－2002
Main performance:
Low driving voltage, light weight and high current efficiency.
Scope of application:
Aluminum alloy sacrificial anodes are suitable for the cathodic protection of metal anti-corrosion of ships, mechanical equipment, marine engineering and port facilities in seawater medium, as well as pipelines and cables in sea mud.
Product features: 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, wharfs, ports and marine facilities in seawater, seawater cooling water systems and the sediment water parts of storage tanks. The aluminum-zinc-indium series (AZI series) sacrificial anodes are cast by alloying high-purity aluminum with metals such as zinc and indium. The production of aluminum alloy anodes complies with GB4948－2002 "Aluminum - Zinc - Indium Series Alloy Sacrificial Anodes".
The aluminum anodes produced by Jiaozuo Libo Light Alloy Co., Ltd. can prevent the corrosion of steel structures in seawater and are widely used in the anti-corrosion of ship hulls, ballast tanks, seawater pipelines, port wharf facilities, marine engineering, drilling platforms, condensers and pipelines in soil media. Since the performance of aluminum anodes is affected by the chemical composition of the alloy, we provide different aluminum alloy combinations to meet the requirements of customers. The standards currently implemented by our company include GB/T 4948-2002, U.S.Mil-A-18001K, W and other standards.
(1) Principle of bond parameter function Lu Guoqi, Shi Pengfei and others found on the basis of a large number of experiments that the atomic parameters of elements that improve the electrochemical performance of aluminum alloys have certain regularities. They used the research method of bond parameter function, that is, using the internal connection between the microscopic structure and macroscopic properties to study aluminum alloys. The value of its electronegativity is calculated by formula (4-1):
x = 0.359z/r + 0.744
x - Electronegativity;
z - Effective nuclear charge number of the atom;
r - Covalent radius.
They believe that elements on or near the straight line drawn by Equation (4 - 1) may improve the electrochemical performance of aluminum alloys. The principle method of bond parameter function can, to a certain extent, help select elements that can improve the electrochemical performance of aluminum anodes.
Aluminum alloy sacrificial anode series: Ordinary aluminum alloy sacrificial anodes, Steel pile anti - corrosion aluminum anodes, Hull anti - corrosion aluminum anodes, Storage tank anti - corrosion aluminum alloy anodes, High - efficiency anti - corrosion aluminum anodes, Aluminum alloy sacrificial anodes for seawater cooling systems, Aluminum anodes for port engineering facilities, Aluminum anodes for marine engineering facilities, Aluminum anodes for ballast water tanks, Activated aluminum alloy sacrificial anodes, High - temperature resistant aluminum alloy sacrificial anodes, Bracelet - type aluminum alloy sacrificial anodes, Aluminum alloy pipes, etc.
Aluminum is a non - ferrous metal with high production, wide resources and low price. The amount of electricity generated per unit weight is large, 36 times that of zinc and 135 times that of magnesium. It has a broad future as a sacrificial anode. Its drawback is that the current efficiency and dissolution performance vary with the anode composition and manufacturing process. In soil, the anode often fails prematurely due to the aggregation of colloidal AI(OH)3. Therefore, the application of aluminum anodes in soil remains to be explored.
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