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Stripping agent for pickling undrawn wire as well as preparation and using methods of stripping agent

A stripper and pre-acid technology, which is applied in the field of metal surface treatment, can solve the problems of uneven waste acid treatment cost, over-corrosion of wires, and occasional fracture of the film layer, etc., to achieve inhibition of corrosion, strong adhesion and resistance Corrosion performance and the effect of reducing interfacial tension

Active Publication Date: 2019-01-11
ANSHAN FALAN STEEL STRIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problem that the surface of the wire rod is prone to over-corrosion after the traditional sulfuric acid pickling, the phenomenon of occasional breakage during the drawing process of the wire rod, the uneven film layer of the wire rod after phosphating, and the problem of high cost of waste acid treatment , providing a stripping agent for pickling treatment before wire drawing and its preparation and use method

Method used

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  • Stripping agent for pickling undrawn wire as well as preparation and using methods of stripping agent
  • Stripping agent for pickling undrawn wire as well as preparation and using methods of stripping agent
  • Stripping agent for pickling undrawn wire as well as preparation and using methods of stripping agent

Examples

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Effect test

Embodiment 1

[0033] A stripping agent for pickling treatment before wire drawing, consisting of the following components in mass percentage:

[0034] Concentrated phosphoric acid: 20%, citric acid: 2.0%, tartaric acid: 2.0%, malic acid: 1.0%, semicarbazide: 0.5%, benzotriazole: 0.5%, sodium persulfate: 1.5%, secondary alkylsulfonic acid Sodium: 0.10%, fatty alcohol polyoxyethylene (15) ether (Pingpingjia OS-15): 0.05%, water: 72.35%.

[0035] At room temperature, mix concentrated phosphoric acid and water in proportion, then add semicarbazide, benzotriazole and sodium persulfate into the diluted phosphoric acid aqueous solution, stir until completely dissolved, then add secondary alkylsulfonate sodium, flat Add OS-15, citric acid, tartaric acid, and malic acid, and stir well to get the peeling agent product.

[0036] Cut the workpiece to be treated into two equal parts, one part is placed in the stripping agent solution, soaked at 50±5°C for 7 minutes, then taken out, washed with water an...

Embodiment 2

[0055] A stripping agent for pickling treatment before wire drawing, consisting of the following components in mass percentage:

[0056] Concentrated phosphoric acid: 5%, citric acid: 5.0%, tannic acid: 5.0%, malic acid: 10.0%, carbamide peroxide: 0.15%, benzotriazole: 0.05%, potassium nitrate: 2.5%, potassium chlorate: 2.5 %, sodium secondary alkyl sulfonate: 0.02%, fatty alcohol polyoxyethylene ether (Pingpinga O-20): 0.03%, water: 69.75%.

[0057] At room temperature, mix concentrated phosphoric acid and water in proportion, then add carbamide peroxide, benzotriazole, potassium nitrate, and potassium chlorate into the diluted phosphoric acid aqueous solution, stir until completely dissolved, and then add sodium secondary alkyl sulfonate , Pingping add O-20, citric acid, tannic acid, and malic acid, and stir well to get the peeling agent product.

[0058] Place the workpiece to be treated in the stripping agent solution, soak it at 45±5°C for 10 minutes, take it out, wash i...

Embodiment 3

[0061] A stripping agent for pickling treatment before wire drawing, consisting of the following components in mass percentage:

[0062] Concentrated phosphoric acid: 50%, tannic acid: 0.1%, tartaric acid: 0.9%, 1,3-dimethylurea: 9.0%, benzotriazole: 1.0%, magnesium persulfate: 0.1%, magnesium chlorate: 0.4%, sodium secondary alkyl sulfonate: 2.9%, fatty alcohol polyoxyethylene (9) ether: 0.1%, water: 35.5%.

[0063] At room temperature, mix concentrated phosphoric acid and water in proportion, then add 1,3-dimethylurea, benzotriazole, magnesium persulfate, and magnesium chlorate into the diluted phosphoric acid aqueous solution, and stir until completely dissolved. Then add sodium secondary alkyl sulfonate, fatty alcohol polyoxyethylene (9) ether, tannic acid, tartaric acid, and stir well to obtain a stripping agent product.

[0064] Place the workpiece to be treated in the stripping agent solution, soak it at 55±5°C for 5 minutes, take it out, wash it with water, and then p...

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Abstract

The invention aims at solving the problems that an overcorrosion phenomenon easily appears on the surface of a traditional wire pickled by using sulfuric acid, an occasional fracture phenomenon appears in a wire drawing process, a film layer is nonuniform after the wire is phosphated and the treatment cost of waste acids is high, provides a stripping agent for pickling an undrawn wire as well as preparation and using methods of the stripping agent and belongs to the technical field of metal surface treatment. The stripping agent disclosed by the invention is composed of the following components in percentage by mass: 5-50% of concentrated phosphoric acid, 1.0-20% of compound organic acid, 0.2-10% of a compound corrosion inhibitor, 0.5-5% of an accelerant, 0.05-3% of a compound surfactant and the balance of water. The stripping agent disclosed by the invention is mainly prepared from the phosphoric acid and the compound organic acid and is remarkable in pickling effect, and an effluentcan be recycled after being regenerated, so that not only is the requirement for environment protection met, but also the production cost is greatly reduced.

Description

technical field [0001] The invention belongs to the technical field of metal surface treatment, and in particular relates to a stripping agent for pickling treatment before wire drawing and a preparation and use method thereof. Background technique [0002] Pickling is a method of using acid solution to remove scale and corrosion products on the surface of steel. It is a key step in the pre-treatment or intermediate treatment of electroplating, rolling, wire drawing and other processes. Pickling acids include sulfuric acid, hydrochloric acid, phosphoric acid, nitric acid and mixed acids. The most commonly used are sulfuric and hydrochloric acids. Since hydrochloric acid is a volatile acid, the amount of acid mist during hydrochloric acid pickling is relatively large, which affects the operating environment and is not conducive to the protection of equipment. The hydrogen chloride gas released will have a great impact on the environment. Sulfuric acid pickling is commonly u...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23G1/06
CPCC23G1/061C23G1/063
Inventor 徐红波王恩栋于宝兴张涛张春艳王振尧陈雷林琳
Owner ANSHAN FALAN STEEL STRIP CO LTD
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