A kind of electrolytic derusting agent and electrolytic derusting method

An electrolytic rust removal and degreasing agent technology, which is applied in the field of metal anticorrosion or rust removal, can solve the problems of insignificant rust removal effect, high surface resistance, and low rust removal efficiency, so as to improve the rust removal effect, increase electrical conductivity, The effect of high rust removal efficiency

Active Publication Date: 2015-08-26
无锡清源数字信息技术研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In the prior art, whether it is anodic derusting method or cathodic derusting method, in order to reduce the influence of unfavorable factors, technicians often hope to shorten the reaction time and obtain a better derusting effect at the same time. The measures taken are to increase temperature, and doing so will inevitably lead to problems such as large energy consumption and uncontrollable operation; at the same time, due to the high surface resistance of the processed workpiece, the rust removal effect is not obvious and the rust removal efficiency is low.

Method used

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  • A kind of electrolytic derusting agent and electrolytic derusting method
  • A kind of electrolytic derusting agent and electrolytic derusting method
  • A kind of electrolytic derusting agent and electrolytic derusting method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] The workpiece A to be derusted is made of No. 45 steel, the size is 65mm×45mm×5mm, and it is exposed to the outdoors for two weeks.

[0065] Prepare the electrolytic derusting solution, including the following components by weight percentage: oxalic acid 2wt%, sulfamic acid 12wt%, concentrated sulfuric acid 1wt%, ferrous sulfate 0.5wt%, sodium chloride 0.5wt%, deionized water to 100wt%.

[0066] Wherein, the purity of sulfamic acid is 99wt%; the purity of oxalic acid is 96wt%; in concentrated sulfuric acid, H 2 SO 4 The content of sodium chloride is 98wt%; the purity of sodium chloride is more than or equal to 99wt%; Ferrous sulfate is ferrous sulfate heptahydrate.

[0067] The specific electrolytic derusting process is as follows:

[0068] (1) Install the workpiece to be derusted on the rack, then soak the workpiece to be derusted in the newly prepared 30% sodium hydroxide solution for 20 minutes, and rinse it in deionized water for 1 minute after soaking;

[0069] ...

Embodiment 2

[0074] The workpiece B to be derusted is made of No. 45 steel with a size of 65mm×45mm×5mm, and it is exposed to the outdoors for two weeks.

[0075] Prepare an electrolytic derusting solution, which contains: oxalic acid 2wt%, sulfamic acid 13wt%, concentrated sulfuric acid 2wt%, ferrous sulfate 1wt%, sodium chloride 1wt%, deionized water up to 100wt%.

[0076] Wherein, the purity of sulfamic acid is 98wt%; the purity of oxalic acid is 99wt%; in concentrated sulfuric acid, H 2 SO 4 The content of sodium chloride is 98.4wt%; the purity of sodium chloride is ≥99.5wt%; ferrous sulfate is ferrous sulfate heptahydrate.

[0077] The specific electrolytic derusting process is as follows:

[0078] (1) Install the workpiece to be derusted on the rack, then soak the workpiece to be derusted in the newly prepared 30% sodium hydroxide solution for 20 minutes, and rinse it in deionized water for 1 minute after soaking;

[0079] (2) Pour the electrolytic derusting solution into the elec...

Embodiment 3

[0084] The workpiece C to be derusted is made of No. 45 steel with a size of 65mm×45mm×5mm, and it is exposed to the outdoors for two weeks.

[0085] Prepare an electrolytic derusting solution, which contains: oxalic acid 3wt%, sulfamic acid 12wt%, concentrated sulfuric acid 1wt%, ferrous sulfate 1wt%, sodium chloride 1wt%, deionized water up to 100wt%.

[0086] Wherein, the purity of sulfamic acid is 95wt%; the purity of oxalic acid is 96wt%; in concentrated sulfuric acid, H 2 SO 4 The content of sodium chloride is 70wt%; the purity of sodium chloride is ≥99.9wt%; ferrous sulfate is ferrous sulfate heptahydrate.

[0087] The specific electrolytic derusting process is as follows:

[0088] (1) Install the workpiece to be derusted on the rack, then soak the workpiece to be derusted in the newly prepared 30% sodium hydroxide solution for 15 minutes, and rinse it in deionized water for 1 minute after soaking;

[0089] (2) Pour the electrolytic derusting solution into the electr...

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Abstract

The present invention relates to an electrolysis rust removing agent, which comprises the following components, by weight, 8-15 wt% of aminosulfonic acid, 1-5 wt% of oxalic acid, 0.7-2.2 wt% of concentrated sulfuric acid, 0.4-1.5 wt% of ferrous sulfate, 0.4-1.5 wt% of sodium chloride, and the balance of water. The electrolysis rust removing agent has characteristics of good electrolysis rust removing effect, high rust removing efficiency, and rapid, stable, safe and durable rust removing process, wherein no volatilization is generated during the rust removing process, no acid mist is generated, no harm is generated to operators, and advantages of environment protection, energy source saving, and cost reducing are provided.

Description

technical field [0001] The invention relates to a derusting agent for electrolytic derusting and an electrolytic derusting process using the derusting agent, in particular to a formula of a derusting solution and an electrolytic derusting process for electrolytic derusting of steel at normal temperature, belonging to Metal anticorrosion or derusting field. Background technique [0002] In order to prolong the service life of the steel, the steel is usually subjected to anti-corrosion treatment, and before the anti-corrosion treatment, the steel must be derusted. At present, the derusting process of iron and steel can be divided into mechanical method, chemical method and electrochemical method according to the different derusting principles. Among them, physical derusting mainly relies on mechanical derusting. Physical derusting has high labor intensity, low production efficiency, serious dust pollution, and is limited by the shape of the workpiece. Edges, corners, grooves,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25F1/06
Inventor 彭涛徐鹤霖张延武章奇超范平何乐
Owner 无锡清源数字信息技术研究院有限公司
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