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Equipment for removing harmful impurities from chromium plating solution

A technology of harmful impurities and equipment, applied in the field of electroplating, can solve the problems of low acid resistance, high operating cost, and easy aging of resin

Inactive Publication Date: 2012-07-11
闫瑞景
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The combination of perfluorosulfonic acid type homogeneous ionic membrane and diatomite, for example: CN102206849A is fast in processing harmful metal impurities, but due to the use of diatomite, the acid resistance is low, the service life is short, and the operating cost is increased
Another way is to use cation exchange resin, which occupies a large area, the resin is easy to age, the operation is complicated, and the operation cost is high

Method used

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  • Equipment for removing harmful impurities from chromium plating solution
  • Equipment for removing harmful impurities from chromium plating solution
  • Equipment for removing harmful impurities from chromium plating solution

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] refer to figure 1 , 2 3. The anode 2 of the device is a metal anode with a six-sided honeycomb structure. The six sides of the honeycomb structure are a mesh structure, and the cross-section of the honeycomb structure is a regular hexagon. The diagonal distance of the regular hexagon is defined as the honeycomb structure. Diameter, the diameter is within the range of 50mm-500mm, the interior of the six-sided honeycomb structure of the anode 2 is a composite porous diaphragm or porous electrolytic diaphragm 1; the anode 2 uses titanium or titanium alloys and titanium-based oxides, it is recommended to use titanium-based lead dioxide or Yttrium oxide (IrO) or lead dioxide (PbO 2 ) or lead-tin alloy (containing tin 6-15%), using metal wires with a thickness of φ0.1-10mm to make a prismatic mesh layout, and the prismatic mesh layout becomes a honeycomb structure after machining. Such an anode 2 does not hinder the circulation of the solution to be treated. The cathode 4 ...

Embodiment 2

[0036] refer to Figure 4, On the basis of Embodiment 1, this embodiment is further equipped with a liquid inlet device-filter pump 9, a liquid outlet device-self-priming pump 10, and a chromium mist exhaust purification device 11. The liquid inlet device pumps the liquid to be treated into the electrolytic cell 8: including scrapped and aged chrome plating solutions that need to be purified, and plastic electroplating roughening solutions that need to be purified. The liquid outlet device is used to discharge the chromium plating solution or plastic electroplating roughening solution that has been purified by the porous electrolytic diaphragm or the composite porous diaphragm out of the electrolytic tank 8 .

[0037] The chromium mist exhaust and purification device 11 is used to discharge the chromium mist in the equipment to prevent harming the human body and polluting the environment. Suspension impurities in the chrome plating solution are filtered and removed by the fil...

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Abstract

The invention discloses a novel electrolysis device for purifying a chromium plating solution. The electrolytic tank device comprises a porous diaphragm or a composite diaphragm, a cathode and an anode, wherein the porous diaphragm is prepared from an aggregate, an additive, a binder and a pore-forming agent; the composite diaphragm is prepared from the porous diaphragm and a perfluorosulfonic acid homogeneous cation exchange diaphragm; the anode consists of phi0.1-10mm titanium and titanium-based oxide or a titanium alloy or lead and a lead alloy, is made of a reticular material and has a honeycomb structure; the cathode consists of phi5-100mm iron or steel or a stainless steel plate or titanium or lead or a lead alloy rod; and the area ratio of the cathode to the anode can be designed as 1:2-1:300 according to the actual production condition. The device quickly removes harmful metal ions from the chromium plating solution, reduces the content of trivalent chromium ions in a plastic electroplating roughening solution, and is small in volume, easy to operate, high in treatment speed and low in cost.

Description

technical field [0001] The invention relates to a device for quickly removing impurities (harmful metal ions) in a chromium plating solution and a device for quickly reducing the content of trivalent chromium ions in a plastic electroplating chromic anhydride sulfuric acid solution, and relates to the technical field of electroplating. Background technique [0002] In the chrome plating process, it includes decorative chromium plating solution and functional chromium plating solution (hard chromium plating solution). Harmful impurities in chromium plating solution include: iron ions, copper ions, calcium ions, nickel ions, zinc ions, sodium ions, potassium ions, chloride ions, nitrate ions, etc. When the total content of harmful metal ions exceeds 15 g / L, the plating solution cannot be electroplated normally, the bright range becomes narrower, the depth capability decreases, the throwing ability becomes worse, and the current efficiency decreases. The plating solution is di...

Claims

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Application Information

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IPC IPC(8): C25D21/16C25D3/04C25B9/06C25B9/08C25B11/02C25B13/04C25B9/17C25B9/19
Inventor 闫瑞景赵鑫梁振海范慧阳闫景芳贾雅博
Owner 闫瑞景