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A process for continuous production of electroplated nickel-zinc anti-fingerprint plate

A process method and technology for electroplating nickel, applied in the field of continuous production of electroplated nickel-zinc fingerprint-resistant plates, can solve the problems of difficulty in controlling electroplating polarization reaction, uneven thickness of the surface zinc layer, affecting the uniformity of the coating, etc. Mechanical properties, uniform and fine coating crystals, and the effect of improving the finish

Inactive Publication Date: 2014-10-22
山东恒达精密薄板科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the crystals of the zinc layer are thick, layered structure, rough crystallization, loose, high porosity, and poor throwing ability (when the current density differs by 20 times at two points, the thickness differs by 8 times). These shortcomings are caused by sulfuric acid Zinc single-salt plating process determined
The zinc sulfate single-salt electroplating process is the original process formula in the history of electroplating. Generally, complexing agents are not used, and it is difficult to control the polarization reaction in the electroplating process. The zinc layer is generally piled directly on the workpiece, so it is rough and loose.
At the same time, the uneven thickness of the surface zinc layer will directly affect the uniformity of the coating, thereby affecting its service life

Method used

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  • A process for continuous production of electroplated nickel-zinc anti-fingerprint plate
  • A process for continuous production of electroplated nickel-zinc anti-fingerprint plate

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Embodiment 1

[0023]A process for continuously producing an electroplated nickel-zinc anti-fingerprint plate, the preparation steps comprising:

[0024] (1) After the base steel plate has undergone decoiling, pinching, shearing, pinching, sewing, and flattening processes in sequence on the production line, the base steel plate is degreased and washed with water until the pH value is neutral;

[0025] (2) Immerse the degreasing and water-washed steel plate in a hydrochloric acid solution with a volume ratio of 8% to activate rust removal;

[0026] (3) After the steel plate treated in step (2) is washed with water until the pH value is neutral, alkaline electroplating nickel is performed, and the composition of the alkaline electroplating nickel solution is: nickel sulfate (NiSO 4 ): 15g / L, SF-880U: 50mL / L, SF-880M: 50mL / L, ammonia water: 5mL / L, KOH: 40 g / L; temperature during alkaline nickel plating: 20°C, pH value control At 11, current density: 1A / dm 2 , the alkaline nickel plating time ...

Embodiment 2

[0031] A process for continuously producing an electroplated nickel-zinc anti-fingerprint plate, the preparation steps comprising:

[0032] (1) After the base steel plate has undergone decoiling, pinching, shearing, pinching, sewing, and flattening processes in sequence on the production line, the base steel plate is degreased and washed with water until the pH value is neutral;

[0033] (2) Immerse the degreasing and water-washed steel plate in a hydrochloric acid solution with a volume ratio of 12% to activate rust removal;

[0034] (3) After washing the steel plate treated in step (2) until the pH value is neutral, perform alkaline nickel plating. The composition of the alkaline nickel plating solution is: nickel sulfate 40g / L, SF-880U 100mL / L, SF-880U -880M 100mL / L, ammonia water 20mL / L, KOH 45g / L; the temperature during the alkaline nickel plating process is 60°C, the pH value is controlled at 8, and the current density is 4A / dm 2 , the time of alkaline electroplating ni...

Embodiment 3

[0039] A process for continuously producing an electroplated nickel-zinc anti-fingerprint plate, the preparation steps comprising:

[0040] (1) After the base steel plate has undergone decoiling, pinching, shearing, pinching, sewing, and flattening processes in sequence on the production line, the base steel plate is degreased and washed with water until the pH value is neutral;

[0041] (2) Immerse the degreasing and water-washed steel plate in a hydrochloric acid solution with a volume ratio of 10% to activate rust removal;

[0042] (3) After washing the steel plate treated in step (2) until the pH value is neutral, perform alkaline nickel plating. The composition of the alkaline nickel plating solution is: nickel sulfate 25g / L, SF-880U 80mL / L, SF-880U -880M 80mL / L, ammonia water 10mL / L, KOH 50g / L; the temperature during the alkaline nickel plating process is 40°C, the pH value is controlled at 9, and the current density is 3A / dm 2 , the time of alkaline electroplating nick...

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Abstract

The invention discloses a technique for continuously producing a nickel-zinc electroplated anti-fingerprint plate, which comprises the following steps: carrying out alkaline nickel electroplating on a substrate steel plate, and carrying out acidic zinc electroplating. The electroplating section technique is organically added into the production line to continuously produce the nickel-zinc electroplated anti-fingerprint plate. The product obtained by using the technique has the advantages of smooth surface, uniform and fine plating crystal, high bonding strength, high adhesive force, high corrosion resistance and excellent mechanical properties, and is especially applicable to harsh environments, such as high heat, high coldness, high humidity, strong heat and the like.

Description

technical field [0001] The invention belongs to the technical field of electroplating, and relates to a process method of a fingerprint-resistant plate, in particular to a process method capable of continuously producing an electroplated nickel-zinc fingerprint-resistant plate. Background technique [0002] At present, the anti-fingerprint coils at home and abroad use zinc sulfate single-salt electro-galvanized sheet as the substrate (such as Shanghai Baosteel, Jiangyin Changfa). The electroplating process of this zinc sheet is zinc sulfate (ZnSO 4 ·7H 2 O) Single-salt galvanizing, the process is generally degreasing→water washing→pickling→water washing→electroplating→post-plating treatment→drying. This process has the advantages of fast deposition of zinc layer and high current efficiency. However, the crystals of the zinc layer are thick, layered structure, rough crystallization, loose, high porosity, and poor throwing ability (when the current density differs by 20 times...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25D3/22C25D5/10
Inventor 袁华刘庆堂孙存于张辉沈明波
Owner 山东恒达精密薄板科技有限公司
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