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Steel and iron blackening agent

A technology of iron and steel blackening agent and pretreatment liquid, applied in the direction of metal material coating process, etc., can solve the problems of insufficient corrosion resistance and poor gloss of the film layer.

Inactive Publication Date: 2015-02-04
HUNAN JINHUA SCI & TECH GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a steel blackening agent with good black film gloss and excellent corrosion resistance for the defects of poor film gloss and insufficient corrosion resistance in existing room temperature blackening agents.

Method used

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  • Steel and iron blackening agent
  • Steel and iron blackening agent
  • Steel and iron blackening agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A steel blackening agent, comprising a pretreatment liquid and a blackening liquid, wherein:

[0022] The pretreatment liquid is prepared from the following raw materials in parts by weight:

[0023] Na 2 S 3 copies;

[0024] NH 4 h 2 PO 4 5 copies;

[0025] 1000 parts of water;

[0026] The meter adjustment time of the pretreatment liquid is 1 to 2 minutes;

[0027] The blackening liquid is prepared from the following raw materials in parts by weight:

[0028]

[0029] The temperature of the blackening solution is 20-30°C, and the blackening time is 5-10 minutes.

[0030] The process of applying the pretreatment liquid and blackening liquid in this embodiment to blackening is as follows: iron and steel parts→oil removal→rust removal→hot water washing→cold water washing→acid activation→cold water washing→pretreatment liquid surface adjustment→blackening liquid Blackening at room temperature→washing in cold water→drying→post-processing→drying→finished produc...

Embodiment 2

[0035] A steel blackening agent, comprising a pretreatment liquid and a blackening liquid, wherein:

[0036] The pretreatment liquid is prepared from the following raw materials in parts by weight:

[0037] Na 2 S 4 copies;

[0038] NH 4 h 2 PO 4 3 copies;

[0039] 1000 parts of water;

[0040] The meter adjustment time of the pretreatment liquid is 1 to 2 minutes;

[0041] The blackening liquid is prepared from the following raw materials in parts by weight:

[0042]

[0043] The temperature of the blackening solution is 20-30°C, and the blackening time is 5-10 minutes.

[0044] The process of applying the pretreatment liquid and blackening liquid in this embodiment to blackening is as follows: iron and steel parts→oil removal→rust removal→hot water washing→cold water washing→acid activation→cold water washing→pretreatment liquid surface adjustment→blackening liquid Blackening at room temperature→washing in cold water→drying→post-processing→drying→finished produc...

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Abstract

The invention discloses a steel and iron blackening agent. The steel and iron blackening agent comprises a pretreatment solution and a blackening solution, wherein the pretreatment solution is prepared from the following raw materials in parts by weight: 3-4 parts of Na2S, 3-5 parts of NH4H2PO4 and 1000 parts of water; the surface conditioning time of the pretreatment solution is 1-2min; the blackening solution is prepared from the following raw materials in parts by weight: 3-5 parts of copper sulfate, 1-2 parts of ammonium molybdate, 1-2 parts of nickel nitrate, 15-20 parts of manganese dihydrogen phosphate, 2-3 parts of citric acid triamine, 0.5-1 part of OP-10 and 1000 parts of water; and the using temperature of the blackening solution is 20-30 DEG C and the blackening time is 5-10min. A black film obtained by blackening with the steel and iron blackening agent disclosed by the invention is fully in line with the requirements of national standard, the luster and the corrosion resistance of the film are also greatly improved, the formula is sequentially actually tried in Valin Steel and Tyen Machinery, and great effects are obtained.

Description

technical field [0001] The invention relates to a steel blackening agent used in the steel or machinery industry. Background technique [0002] The room temperature blackening agent for iron and steel has the advantages of stable solution, short blackening time, suitable color, convenient and simple use process, sufficient raw materials, low cost, etc., especially the adhesion of the blackening film layer, and the corrosion resistance is obviously better than the original high temperature blackening agent . It has the characteristics of no pollution, energy saving, no steel type selectivity, etc. It has opened up a new way to solve the long-standing problems of alkaline high-temperature blackening, high pollution, high energy consumption, and selection of rigidity, and provides an ideal advanced technology for the blackening treatment of steel products of various manufacturers. This product is widely used in the black decoration and protective treatment of the surface of s...

Claims

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Application Information

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IPC IPC(8): C23C22/68
CPCC23C22/68C23C22/78
Inventor 许峻豪
Owner HUNAN JINHUA SCI & TECH GRP
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