A kind of anti-corrosion positive grid green alloy of lead-acid storage battery
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A lead-acid battery, anti-corrosion technology, applied in the direction of electrode carrier/collector, etc., can solve the problems of environmental pollution, coarse alloy crystal image, intergranular corrosion, etc.
Active Publication Date: 2018-02-23
济源市万洋绿色能源有限公司
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[0002] The grid is an important core component of the lead-acid battery. The commonly used grid alloys include Pb-Sb-Cd and Pb-Ca-Sn-Al, etc. However, the Ca element will easily form a high-resistance passivation film on the surface of the alloy. Moreover, the crystal image of Pb-Ca-Sn-Al alloy is coarse. Since the positive electrode belongs to the repeated process of redox during use, the Pb-Ca-Sn-Al alloy is easily oxidized in this environment, resulting in intergranular corrosion, which is serious Affect the use and life of the battery. Although the capacity and maintenance-free performance of the Pb-Sb-Cd alloy battery are superior, the Cd element is a toxic element that will endanger the safety of workers and pollute the environment.
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Embodiment 1
[0013] The anti-corrosion positive grid green alloy of the lead-acid storage battery of the present invention comprises the following components in weight percent: tin (Sn) 0.8-1.5%, calcium (Ca) 0.08-0.15%, aluminum (Al) 0.01-0.04%, cerium (Ce) 0.02-0.2%, lanthanum (La) 0.02-0.2%, neodymium (Nd) 0.02-0.2%, silver (Ag) 0.001-0.05%, the rest is lead, and the lead grade is greater than 99.99%.
[0014] The original alloy contains Pb-Ca-Sn-Al, and its alloy crystal image is coarse. Since the positive electrode is a repeated process of oxidation and reduction during use, the original composition alloy is easily oxidized in this environment to cause intergranular corrosion. In addition, it is necessary to retain the operability and high hydrogen evolution potential of the original alloy. Therefore, the refinement and consistency of the alloy crystal are mainly studied. Through a large number of scientific and reasonable experiments, it is found that the amount of Ce, La, Nd, and Ag ...
Embodiment 2
[0022] The anti-corrosion positive grid green alloy of the lead-acid storage battery of the present invention comprises the following components in weight percent: 1.0-1.2% of tin, 0.1-0.13% of calcium, 0.02-0.03% of aluminum, 0.05-0.1% of cerium, and 0.05-0.1% of lanthanum %, neodymium 0.05~0.1%, silver 0.005~0.03%, all the other are lead, others are the same as embodiment 1.
[0023] The alloy formula of Example 3-22 is shown in Table 1-2 (lead is not included, the percentage of the alloy in the table is removed, and the rest is lead), and the rest are the same as in Example 1.
[0024] Table 1 Alloy Formula Table of Embodiment 3-12 of the present invention
[0025]
[0026] Table 2 Alloy Formula Table of Embodiment 13-22 of the present invention
[0027]
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Abstract
A corrosion-resistant green alloy of a positive grid for a lead-acid storage battery comprises the following constituents based on weight: 0.8-1.5% of tin, 0.08-0.15% of calcium, 0.01-0.04% of aluminum, 0.02-0.2% of cerium, 0.02-0.2% of lanthanum, 0.02-0.2% of neodymium, 0.001-0.05% of silver and the balance of lead. Through scientific and reasonable tests and by adding Ce, La, Nd and Ag based on formula ratios disclosed by the invention, the corrosion-resistant green alloy of the positive grid for the lead-acid storage battery, disclosed by the invention, maintains operability and high hydrogen evolution potential in the original alloy, and the original Pb-Ca-Sn-Al crystal structure is naturally changed; through corrosion resistant tests, the corrosion resistant performance is found to be improved than the original Pb-Ca-Sn-Al alloy by three or four times; and the positive grid is not corroded when the corrosion-resistant green alloy of the positive grid for the lead-acid storage battery reaches 800 times of 100% DOD.
Description
technical field [0001] The invention belongs to the technical field of lead-acid storage battery production, and in particular relates to a green alloy for anti-corrosion positive grids of lead-acid storage batteries. Background technique [0002] The grid is an important core component of the lead-acid battery. The commonly used grid alloys include Pb-Sb-Cd and Pb-Ca-Sn-Al, etc. However, the Ca element will easily form a high-resistance passivation film on the surface of the alloy. And the crystal image of Pb-Ca-Sn-Al alloy is coarse, because the positive electrode belongs to the repeated redox process during use, so the Pb-Ca-Sn-Al alloy is easily oxidized in this environment, resulting in intergranular corrosion, which is serious Affect the use and life of the battery. Although the capacity and maintenance-free performance of the Pb-Sb-Cd alloy battery are superior, the Cd element is a toxic element that will endanger the safety of workers and pollute the environment. C...
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