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Stainless steel blackening agent and blackening method

A kind of stainless steel and blackening agent technology, applied in the direction of metal material coating process, etc., can solve the problems of over-color, stainless steel blackening agent polluting the environment, uneven color of stainless steel film layer, etc., to achieve strong decorative, glossy Good, black and uniform effect of film layer

Active Publication Date: 2011-01-05
江苏扬先科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is that the existing stainless steel blackening agent pollutes the environment, and the stainless steel film layer obtained after blackening is uneven in color and has the defect of flooding, thereby providing an environmentally friendly, blackened stainless steel film. A stainless steel blackening agent with uniform color and brightness of the stainless steel film layer
[0006] At the same time, in order to solve the defects of uneven color and brilliance of the stainless steel film layer obtained after blackening of stainless steel, thereby providing a stainless steel blackening method that can make the blackened stainless steel film layer uniform in color and bright

Method used

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  • Stainless steel blackening agent and blackening method
  • Stainless steel blackening agent and blackening method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] This example is used to illustrate the preparation and blackening method of the blackening agent of the present invention.

[0025] 1. Preparation of blackening agent

[0026] Weigh 480g of sodium hydroxide, 70g of sodium nitrate and 10g of sodium molybdate and dissolve them in 500mL of deionized water, stir, and then add water to 1L to obtain the blackening agent of this embodiment.

[0027] 2. Blackening method

[0028] Soak the stainless steel workpiece in JSD-all-purpose degreasing solution (Jiesda) and JSD-acid degreasing solution (Jiesda) respectively for 5 minutes to remove the oil on the surface; sodium hydrogen) in the activation solution, the concentration of the activation solution is 250g / L, then the stainless steel workpiece after the activation is oxidized and blackened in the blackening agent prepared in 1, the temperature of the oxidized black is 125 ℃, and the oxidized black The time is 8 minutes. Finally, the workpiece is washed with water and dried...

Embodiment 2

[0030] 1. Preparation of blackening agent

[0031] Weigh 450g of sodium hydroxide, 75g of sodium nitrate, 8g of sodium molybdate and 28g of sodium dihydrogen phosphate, dissolve them in 500mL of deionized water, stir, and then add deionized water to 1L to obtain the blackening agent of this example.

[0032] 2. Blackening method

[0033] Soak the stainless steel workpiece in JSD-all-purpose degreasing solution (Jiesda) and JSD-acid degreasing solution (Jiesda) for 5 minutes each to remove the oil on the surface; put the degreased stainless steel workpiece in sodium bisulfate Activation, the concentration of sodium bisulfate is 270g / L, and then the stainless steel workpiece is oxidized and blackened in the blackening agent prepared in 1. The temperature of oxidized hair is 125°C, and the time of oxidized blackened is 8min. Finally, the workpiece is washed and dried to remember the blackened stainless steel workpiece A2.

Embodiment 3

[0035] 1. Preparation of blackening agent

[0036] Weigh 450g of sodium hydroxide, 75g of sodium nitrate, 8g of sodium molybdate, 28g of sodium dihydrogen phosphate and 40g of sodium sulfide and dissolve them in 500mL of deionized water, and stir, then add deionized water to 1L to obtain the blackening agent.

[0037] 2. Blackening method

[0038] Soak the stainless steel workpieces in JSD-all-purpose degreasing solution (Jiesda) and JSD-acid degreasing solution (Jiesda) respectively for 3-5 minutes to remove the oil on the surface; degreasing the stainless steel workpieces in hydrogen sulfate Activation in sodium, the concentration of sodium bisulfate is 200g / L, and then the stainless steel workpiece is oxidized and blackened in the blackening agent prepared in 1. The temperature of oxidized blackening is 125°C, and the oxidized blackening time is 8min. Finally, the workpiece is washed and dried to remember the blackened stainless steel workpiece A3.

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Abstract

The invention belongs to the technical field of surface treatment and relates to a stainless steel blackening agent, which contains aqueous solution which is formed by dissolving sodium hydroxide, sodium nitrate and sodium molybdate in deionized water, the content of the sodium hydroxide is 400-540g / L, the content of the sodium nitrate is 28.5-114g / L, and the content of the sodium molybdate is 5.7-57g / L. The invention also provides a blackening method for stainless steel, which comprises the following step: a stainless steel work piece is put into the stainless steel blackening agent to be oxidized and blackened, and the stainless steel blackening agent is the stainless steel blackening agent in any of claims 1-4. The stainless steel blackening agent and the blackening method are applicable to the fields of electronic industry, kitchen utensils, household appliances, instruments and meters, automotive industry, chemical equipment and the like.

Description

technical field [0001] The invention relates to a stainless steel blackening agent and a blackening method. Background technique [0002] Black stainless steel is widely used in the field of construction and decoration materials. With the continuous improvement of people's needs, industries such as electronics industry, kitchen utensils, household appliances, instruments and meters, automobile industry, chemical equipment, sign printing and aerospace military industry can no longer be satisfied with the use of primary color stainless steel, and have begun to use black stainless steel. Therefore, stainless steel oxidation blackening as a stainless steel coloring technology began to receive people's attention. [0003] Potassium dichromate and sulfuric acid are commonly used as blackening agents for stainless steel in the prior art. The blackening agent contains potassium dichromate, which pollutes the environment. and other defects. Contents of the invention [0004] The...

Claims

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Application Information

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IPC IPC(8): C23C22/62C23C22/78
Inventor 闫冬王鹏
Owner 江苏扬先科技有限公司
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