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Offshore concrete buried high activity sacrificial anode
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A marine concrete and sacrificial anode technology, which is applied in the field of reinforced concrete anti-corrosion sacrificial anode products, can solve the problems of anode failure, anode deactivation, and harmfulness of concrete, so as to prevent steel corrosion, facilitate dissolution, and increase cross-sectional area Effect
Active Publication Date: 2017-08-08
CCCC FOURTH HARBOR ENG INST +2
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And the anode corrosion products are not only harmful to the concrete, but also may cause the anode to lose its activity, leading to the failure of the anode
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Embodiment 1
[0027] This example is a manufacturing example of the marine concrete embedded high-activity sacrificial anode of the present invention.
[0028] like figure 1 Shown is the marine concrete embedded high-activity sacrificial anode of the present invention, which has a long cylindrical appearance and includes an anode body 2, a metal wire 1 and a mortar body 3 completely enclosing the anode body 2 therein. The metal wire 1 is connected with the anode body 2 and extends out of the mortar body 3 .
[0029] The anode body is made of zinc or zinc alloy, roughly 13 cm long, 1 cm wide, and 1 cm high. The metal wire 1 is preferably iron wire, which can be directly fixed to both ends of the anode body, or can be embedded. For example, grooves are provided along the central axis of the anode body, and metal wires are buried in them, and the two ends of the metal wires are exposed. Fix the anode body in the middle of the mortar mold with a bracket, and fix the metal wire, then fill the...
Embodiment 2
[0034] In this example, the marine concrete embedded high-activity sacrificial anode obtained according to the formulas numbered 1 to 4 in Example 1 is applied to steel bars that need to be protected in construction projects.
[0035] After the reinforcement is bound and before the concrete is poured, the marine concrete embedded high-activity sacrificial anode 4 is bound to the reinforcement with the metal wire 1, and then the concrete is poured according to the normal construction procedure.
Embodiment 3
[0037] In this example, the marine concrete embedded high-activity sacrificial anode obtained according to the formula numbered 1 to 4 in Example 1 is applied to the steel bars that need to be protected in the built project. exist figure 2 As shown, part of the concrete is chiseled first to expose a section of the steel bar, the marine concrete embedded high-activity sacrificial anode 4 is bound to the steel bar 6 with a metal wire 1, and the chiseled part is filled with fresh concrete 5.
[0038] Highly active mortar can not only dissolve the oxidation products of zinc, but also has good electrical conductivity. This ensures that the zinc continues to dissolve, providing an electrical current to protect the steel bars in the concrete.
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Abstract
The invention discloses a marine concrete embedded high-activity sacrificial anode, which includes an anode body, a metal wire and a mortar body completely wrapping the anode body inside, and the metal wire extends from the inside of the anode body to the mortar body In addition, the mortar body is composed of Portland cement, fine aggregate, water, fiber, water-absorbing material and ionic activator. The water-cement ratio of the mortar body is (0.40-0.70): 1; the lime-sand ratio is (0.20-0.40 ): 1; the fiber is glass fiber or carbon fiber, and its dosage is 0.3% to 3% of the mass of Portland cement; the water-absorbing material is vermiculite powder or bentonite, and the dosage is 10% to 35% of the mass of Portland cement; The ionic activator is lithium bromide or sodium chloride, and the dosage is 20% to 40% of the Portland cement mass. The product of the invention has a simple structure and is easy to install, avoids laying mortar on the surface of the reinforced concrete structure, reduces engineering quantity, and does not require professional installation and maintenance. The sacrificial anode of the invention can protect steel bars in chlorine-containing environments.
Description
technical field [0001] The invention relates to a reinforced concrete anti-corrosion sacrificial anode product, in particular to a marine concrete embedded high-activity sacrificial anode used in salt-polluted environments and deicing salt conditions. Background technique [0002] Reinforced concrete structure is the most widely used structural form at present. Generally, reinforced concrete structures have excellent durability. But coastal areas and the number of reinforced concrete structures damaged by de-icing salts are staggering, and the damage is huge. In order to prevent or control the corrosion of steel bars in concrete and prolong the service life of reinforced concrete buildings, various protective measures have been proposed according to the anti-corrosion mechanism. Among them, cathodic protection is recognized as the most effective technology to prevent the corrosion of steel bars in concrete. [0003] The forced current cathodic protection method has been w...
Claims
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