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Blackening agent used for steel and iron surface at room temperature and preparation method for blackening agent at room temperature

A steel surface, room temperature technology, applied in the direction of metal material coating process, etc., can solve the problems of rust, long blackening time, and easy black film fall off.

Inactive Publication Date: 2011-04-20
JIANGSU DEMEI TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current blackening liquid generally has defects such as long blackening time, easy peeling off of the black film, and rust return, which affect the use

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0010] Select the following raw materials and dosage (unit: g):

[0011] Copper sulfate 2.5 Selenite 5.5

[0012] Potassium dihydrogen phosphate 3 Phosphoric acid 4

[0013] Hydroquinone 2.5 OP-10 0.1

[0014] Prepare the normal temperature blackening liquid according to the following steps: 1. Pour 200ml of deionized water into a 1L beaker.

[0015] 2. Pour 50ml deionized water into a 100ml beaker and heat it to about 50℃ to dissolve 2.5g copper sulfate with stirring.

[0016] 3. Pour 50ml deionized water into a 100ml beaker and heat about 50℃ to dissolve 3g potassium dihydrogen phosphate with stirring.

[0017] 4. Pour 50ml of deionized water into a 100ml beaker and heat it to about 50℃ to dissolve 5.5g of selenite with stirring.

[0018] 5. Pour 50ml deionized water into a 100ml beaker and heat it to about 50℃ to dissolve 2.5g hydroquinone with stirring.

[0019] Pour the above dissolved solutions into a 1L beaker in turn. Then 4g phosphoric acid and 0.1g OP-10 emulsion were added and f...

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PUM

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Abstract

The invention discloses a blackening agent at room temperature and a preparation method for the blackening liquid at the room temperature, which are widely applied to the blackening processing for finished products or parts of various alloy steels, cast irons and the like. The blackening agent at the room temperature is prepared from the following components: 2-4g / L of copper sulfate, 5-8g / L of seleninic acid, 2-4g / L of monopotassium phosphate, 1.5-3g / L of hydroquinone, 3-5g / L of phosphoric acid and 0.08-0.3g / L of OP-10. The preparation method comprises the following steps: respectively dissolving the components except the phosphoric acid and the OP-10 with deionized water through heating and then mixing the components evenly, and finally adding the phosphoric acid and the OP-10 for evenly mixing. The blackening agent has the advantages of quick blackening, good film quality and low production cost.

Description

Technical field [0001] The invention relates to the field of metal surface chemical treatment, in particular to the normal temperature blackening treatment of various alloy steel and cast iron surfaces. Background technique [0002] The earliest technology for iron and steel parts after oxidation treatment is to use sodium hydroxide and sodium nitrite to form a blue-black oxide film on the surface of the steel in a high temperature solution of about 140°C. With the development of science and technology, domestic and foreign countries have successively developed and developed blackening liquid that generates oxide film on the surface of steel parts at room temperature. However, the current blackening liquid generally has defects such as long blackening time, easy peeling of black film, and rust back, which affect the use. Summary of the invention [0003] The invention provides a normal temperature blackening liquid and a configuration method, as well as a steel surface blackening...

Claims

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Application Information

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IPC IPC(8): C23C22/10
Inventor 瞿德勤
Owner JIANGSU DEMEI TECH
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