Method for preparing the working layer of a conductive roller

A technology of conductive roller and working layer, applied in the field of preparation of conductive roller working layer, can solve the problems of poor corrosion resistance and mechanical properties, high chrome plating layer, micro-cracks in chrome plating layer, etc., and achieves excellent corrosion resistance and mechanical properties, good Corrosion resistance, mechanical properties and uniform structure

Inactive Publication Date: 2013-04-24
安徽华淮新材料有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

If the method of coil welding is adopted, due to the great difference in the structure of the welded seam and other parts of the surface layer, the corrosion resistance and mechanical properties of the welded seam are generally poor, which often leads to the working layer of the conductive roller in the welded seam. failure occurred
Using the centrifugal casting method, in the casting process, it is easy to introduce defects such as composition segregation, pores and inclusions, which reduces the corrosion resistance of the material surface, thus affecting the service life of the conductive roller
In addition, the method of electroplating the chromium layer will generate a large amount of chromium hydride during the electroplating process, which will cause excessive internal stress, resulting in microcracks in the chrome plating layer. The existence of microcracks will seriously reduce the corrosion resistance of the working layer of the conductive roller.
In addition, due to the high internal stress of the chrome layer, it is difficult to obtain a thicker electroplated chrome layer

Method used

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  • Method for preparing the working layer of a conductive roller
  • Method for preparing the working layer of a conductive roller

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Experimental program
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Embodiment 1

[0038] This embodiment includes the following steps:

[0039] Step 1, cleaning and degreasing to remove the grease on the surface of the conductive roller base.

[0040] Preferably, in step 1, an alkaline formula is used for degreasing, the content of sodium hydroxide in the alkaline degreasing solution is 15-30 g / L, the content of sodium carbonate is 20-40 g / L, and the content of trisodium phosphate is 20-40 g / L L, the degreasing temperature is 50~70°C, and the degreasing time is 5~10 minutes.

[0041] Step 2, washing with flowing water to remove the degreasing solution remaining on the surface of the conductive roller substrate.

[0042]Step 3, activation, removing the passivation film on the surface of the conductive roller substrate; the concentration of hydrochloric acid in the solution used for activation is 10-20%, the temperature of the activation solution is normal temperature, and the activation time is 1-2 minutes. The purpose of this step is, because the passivat...

Embodiment 2

[0063] Embodiment 2 is a modification example of Embodiment 1.

[0064] This embodiment is based on embodiment 1, specifically,

[0065] The nickel-phosphorus amorphous alloy electroplating solution is arranged in the electroplating solution storage tank, the total capacity is 3L, and the concentration of each component in the electroplating solution is: nickel sulfate 240g / L, nickel chloride 45g / L, phosphoric acid 30g / L, boric acid 20g / L, sodium lauryl sulfate 10mL / L, and 1400mL dilute hydrochloric acid (concentration 37%) was added to the electroplating solution to adjust the pH value of the plating solution to 2.0. The electroplating solution storage tank is connected to the horizontal electroplating tank, the electroplating solution is continuously filtered, and at the same time, the electroplating solution is heated and the temperature of the electroplating solution is controlled at 75±1°C. The length of a roll surface is 1800mm, the diameter of the roll body is 350mm, ...

Embodiment 3

[0067] Embodiment 3 is a modification example of Embodiment 1.

[0068] This embodiment is based on embodiment 1, specifically,

[0069] The nickel-phosphorus amorphous alloy electroplating solution is arranged in the electroplating solution storage tank, the total capacity is 3L, and the concentration of each component in the electroplating solution is: nickel sulfate 240g / L, nickel chloride 45g / L, phosphoric acid 30g / L, boric acid 20g / L, sodium lauryl sulfate 5mL / L, and add 800mL dilute hydrochloric acid (concentration 37%) to the plating solution to adjust the pH value of the plating solution to 2.5. The electroplating solution storage tank is connected to the horizontal electroplating tank, the electroplating solution is continuously filtered, and at the same time, the electroplating solution is heated and the temperature of the electroplating solution is controlled at 73±1°C. Carry out cleaning and degreasing treatment to a conduction roll substrate with a roll surface ...

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Abstract

The invention discloses a method for preparing the working layer of a conductive roller, comprising: Step 1, cleaning and deoiling, for removal of the oil on the conductive roller substrate surface; step 2, washing with flowing water, for removal of residual deoiling solution on the conductive roller substrate surface; step 3, activating, for removal of the passivation film on the conductive roller substrate surface; step 4, washing with flowing water, for removal of residual activating solution on the conductive roller substrate surface; step 5, transferring the conductive roller substrate to a level plating bath containing a plating solution, for preparing a nickel-phosphorus amorphous alloy work layer on the conductive roll substrate surface; and step 6, when the prepared working layer reaches a desired thickness, removing the conductive roller. The obtained conductive roller working layer of the present invention is a nickel-phosphorus amorphous alloy which is dense, homogeneous, and without pores, micro-cracks and other defects in the microstructure, and at the same time, has no presence of crystal defects such as grain boundaries, dislocations and stacking faults existing in the conductive roller working layer prepared by conventional techniques, good to meet corrosion resistance and mechanical performance requirements desired by a conductive roller used for galvanizing.

Description

technical field [0001] The invention relates to the technical field of conductive rollers in an electrogalvanizing production line, in particular to a method for preparing a working layer of a conductive roller. Background technique [0002] Conductor rolls are key components in continuous electrogalvanizing lines, transporting the steel strip and conducting the strong cathodic current during the electroplating process. At present, corrosion-resistant alloys are generally used as the outer layer (working layer) of the conductive roller used in the continuous electrogalvanizing production line, which is used after grinding and polishing. Due to the harsh working conditions of the conductive roller, on the one hand, the surface of the working layer of the conductive roller will contact the electroplating solution containing corrosive media such as hydrogen ions, sulfate ions, chloride ions, iron ions, etc. On the other hand, the working layer of the conductive roller Wear is ...

Claims

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Application Information

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IPC IPC(8): C25D7/00C25D5/34C25D3/56
Inventor 钟澄胡文彬刘帆刘磊沈彬
Owner 安徽华淮新材料有限公司
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