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Zinc plating deactivation liquid

A technology of passivation solution and ferric chloride, which is applied in the coating process of metal materials, can solve the problems of light color and poor surface color consistency, and achieve the effect of good color consistency and saturated color

Inactive Publication Date: 2007-09-26
攀枝花钢城集团恒升实业有限公司
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0003] In order to solve the problem of poor color consistency and light color on the surface of products after passivation using the existing passivation solution, the present invention provides a new passivation solution

Method used

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Examples

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Embodiment Construction

[0008] The present invention will be further described below in conjunction with embodiment.

[0009] The passivation solution of the present invention is made up of chromic anhydride, nitric acid, sulfuric acid, ferrous sulfate, ferric chloride, acetic acid, water, and each formula ratio is, chromic anhydride (200-220) g / L; Nitric acid (24 -28)mI / L; sulfuric acid (12-18)mI / L; ferrous sulfate (6-8)g / L; ferric chloride (8-12)g / L; acetic acid 5-8mI / L; for water.

[0010] When preparing the passivation solution, first determine the total volume of the prepared passivation solution, and then calculate the weight or volume of each component according to the total volume, add them to the container in turn, and stir evenly.

[0011] In actual passivation, the dipping time is about 4 seconds, and the idle time is 20-25 seconds

[0012] Passivation of yellow phosphorus barrel body:

[0013] 1. Use 200g / L of chromic anhydride; 24mI / L of nitric acid; 12mI / L of sulfuric acid; 6g / L of f...

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PUM

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Abstract

The invention discloses an inactivating liquid of zinc coating, which comprises the following parts: (200-220) g / L chromic anhydride, (24-28) ml / L nitric acid, (12-18) ml / L sulfuric acid, (6-8) g / L ferrous sulfate, (8-12) g / L iron trichloride, 5-8ml / L acetic acid and water. The produce surface displays good consistency inactivated by inactivating liquid, which possesses even brightness and gloss.

Description

technical field [0001] The invention relates to a galvanized passivation technology, in particular to a passivation solution for color passivation of large-area galvanized electroplating. Background technique [0002] At present, there are many passivation methods for galvanized products, mainly divided into chromic acid passivation and chromium-free passivation, and chromic acid passivation is still the mainstream process in the industry. According to the chromium content of passivation solution, chromic acid passivation can be divided into high chromium passivation, low chromium passivation and ultra-low chromium passivation. When the existing passivation solution is used to passivate the galvanized products, it is difficult to control the color of the products after low chromium passivation and ultra-low chromium passivation, the color consistency is poor, and the visual effect is not good, especially for large surface areas. The performance of the product is more seriou...

Claims

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Application Information

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IPC IPC(8): C23C22/27
Inventor 黎万龙徐铁龙谭国伦
Owner 攀枝花钢城集团恒升实业有限公司
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