Method of barrel electroplating with aluminum or aluminum alloy

An aluminum alloy and barrel plating technology, applied in the direction of electrolysis components, electrolysis process, etc., can solve the problems such as the inability to fully ensure that the cathode and the object to be plated contact the object to be plated, and the poor electrification of the object to be plated.

Inactive Publication Date: 2015-02-11
DISPOL CHEMICALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, when the number of objects to be plated in the drum is small, there is a problem that the contact between the cathode and the objects to be plated or the contact between the objects to be plated cannot be sufficiently ensured, and a part of the objects to be plated has poor electrical conduction.

Method used

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  • Method of barrel electroplating with aluminum or aluminum alloy
  • Method of barrel electroplating with aluminum or aluminum alloy
  • Method of barrel electroplating with aluminum or aluminum alloy

Examples

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Embodiment 1

[0107] An aluminum alloy was plated on an M8 bolt using a barrel plating apparatus 1 (5 kg barrel) having an Al plate as a cathode and an Al as an anode. The input amount of bolts is varied between 1 and 5kg. First, as a pretreatment, alkali degreasing, alkali electrolytic cleaning, and pickling are performed, Ni plating is performed, water washing is sufficient, and water is replaced with ethanol, followed by drying.

[0108] For the composition of the plating bath, to AlCl 3 Al-Zr-Mn was prepared by adding 10 g / L of manganese chloride and 1 g / l of zirconium chloride to a bath prepared by mixing and melting 1-methyl-3-propylimidazolium bromide at a molar ratio of 2:1. Alloy plating baths. In a dry nitrogen atmosphere, immerse in the aforementioned Al-Zr-Mn alloy plating bath maintained at 100°C for 5 minutes, and then use the same plating bath with a pulse current (duty ratio: 1 / 1, ON time: 10ms, OFF Time: 10ms) Plating Al-Zr-Mn alloy. The plating condition is set to a cu...

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Abstract

To provide a barrel electroplating method which is less prone to bare spots and adhesion failure such as blisters and peeling, and which makes it possible to obtain uniform plated coatings free from burnt deposits and poor brightness, irrespective of the amount of workpieces. The present invention provides a method for performing barrel electroplating by use of an aluminum or aluminum alloy plating bath, the method comprising rotating, swinging, or vibrating an anode (6) placed inside a barrel (4) receiving workpieces, and simultaneously rotating, swinging, or vibrating the barrel, with a voltage being applied between the anode and a cathode provided on an inner wall surface of the barrel.

Description

technical field [0001] The invention relates to a barrel plating method, in particular to an aluminum or aluminum alloy barrel plating method for small parts such as bolts and screws. Background technique [0002] Japanese Unexamined Patent Application Publication No. 49-130 (Patent Document 1) describes a method and an apparatus for rotating a drum of a coating tank. The plating apparatus described here has a drum that accommodates an object to be plated, a cathode inserted into the drum to be in contact with the object to be plated, and an anode disposed outside the drum. [0003] Image 6 It is a schematic cross-sectional view of an example of a barrel plating apparatus used in a conventional barrel plating method. Such as Image 6 As shown, the conventional barrel plating apparatus 100 has a barrel 104 rotatably supported in a plating tank 102 , and the object W to be plated is housed inside the barrel 104 . In addition, the cathode 106 is arranged in the drum 104 so a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25D17/20C25D3/44C25D3/56
CPCC25D3/56C25D3/665C25D7/001C25D5/04C25D17/20C25D3/44C25D7/003
Inventor 井上学大沼忠宽猪股俊树宫寺勉
Owner DISPOL CHEMICALS CO LTD
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