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Combined titanium anode for hexavalent chromium electroplating and preparation method thereof

A technology of hexavalent chromium and titanium anodes, applied in the direction of electrodes, can solve the problems of plating solution pollution, poor anode stability, accelerated dissolution, etc., and achieve the effect of good plating solution stability

Active Publication Date: 2017-03-22
西安博岳环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But traditional Ti / PbO 2 The stability of the anode is poor, and its failure mechanism is the dissolution of lead dioxide, especially when working continuously at a high current density, it will accelerate its dissolution and pollute the plating solution

Method used

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  • Combined titanium anode for hexavalent chromium electroplating and preparation method thereof
  • Combined titanium anode for hexavalent chromium electroplating and preparation method thereof
  • Combined titanium anode for hexavalent chromium electroplating and preparation method thereof

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preparation example Construction

[0039] A method for preparing a combined titanium anode for hexavalent chromium electroplating, comprising the following steps;

[0040] Step 1. After the pretreatment of the titanium substrate, Ta 2 o 5 , IrO 2 -Ta 2 o 5 , IrO 2 -Ta 2 o 5 -SnO 2 and IrO 2 -SnO 2 A titanium-based noble metal oxide anode 2 containing a coating is made, and the other titanium substrate is pre-treated, and SnO is first burnt 2 -Sb 2 o 5 , then plated PANI-doped PbO 2 Layer made of titanium-based base metal oxide anode 3 containing coating;

[0041] The titanium-based noble metal oxide anode 2 containing the coating made in step 1 is specifically;

[0042] Step 1.1. After the titanium substrate is sandblasted, put it into 10wt% NaOH solution and boil it to remove oil, then pickle it in boiling oxalic acid solution for at least 1 hour to remove scale, and finally wash it with tap water, deionized water and alcohol in sequence. After washing, dry for later use;

[0043] Step 1.2, mix...

Embodiment 1

[0058] A method for preparing a combined titanium anode for hexavalent chromium electroplating, comprising the following steps;

[0059] Step 1, making a titanium-based noble metal oxide anode 2 containing a coating is specifically;

[0060] Step 1.1. After the titanium substrate is sandblasted, put it into 10wt% NaOH solution and boil it to remove oil, then pickle it in boiling oxalic acid solution for at least 1 hour to remove scale, and finally wash it with tap water, deionized water and alcohol in sequence. After washing, dry for later use;

[0061] Step 1.2, mix n-butanol and isopropanol at a volume ratio of 1:1 to make n-butanol-isopropanol mixed solvent, which is used to dissolve the precious metal precursor and configure it as a coating solution;

[0062] Step 1.3, 20g / L TaCl 5 The n-butanol-isopropanol coating liquid is coated on the dried titanium substrate, dried at 120°C for 10 minutes, and then fired at 500°C for 15 minutes, and the above coating-drying-calcinat...

Embodiment 2

[0073] Example 2 is the same as Example 1, except that the combination ratio of A1 and B1 is 3:1 to obtain a combined titanium anode P2.

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Abstract

The invention discloses a combined titanium anode for hexavalent chromium electroplating. The combined titanium anode comprises a titanium base noble metal oxide anode and a titanium base base metal oxide anode arranged on a conducting bar; a titanium base noble metal oxide anode coating layer consists of Ta2O5, IrO2-Ta2O5, IrO2-Ta2O5-SnO2 and IrO2-SnO2 from inside to outside; and a titanium base base metal oxide anode coating layer is PANI-doped PbO2. A preparation method of the combined titanium anode for hexavalent chromium electroplating comprises the following steps: the coating layers are firstly prepared for the titanium base noble metal oxide anode and the titanium base base metal oxide anode, and are combined to obtain the combined titanium anode. The combined titanium anode is high in electrocatalytic activity and corrosion resistance, can work under high current density in the hexavalent chromium electroplating production, generates no anode mud, and is long in service life.

Description

technical field [0001] The invention belongs to the technical field of anode materials in the electrochemical industry, and specifically relates to a combined titanium anode for hexavalent chromium electroplating, and also relates to a preparation method of the combined titanium anode. Background technique [0002] The anode material is the most critical component in the electrochemical industry. This is because: the anode material is the site of the anode reaction. From the perspective of saving energy and reducing costs, it is required to have high electrochemical activity and stability for the catalyzed anode reaction. Chromium electroplating is an electrochemical method for depositing chromium on the surface of the substrate. The process is quite special. The anode used is an insoluble anode, which must have high corrosion resistance and stability. The hexavalent chromium electroplating solution mainly contains chromic anhydride and sulfuric acid (it can also be F - , S...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D17/10C25D3/08
CPCC25D3/08C25D17/10
Inventor 周偎偎
Owner 西安博岳环保科技有限公司
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