Bolt surface blackening treatment liquid and blackening treatment method thereof

A technology for surface blackening and blackening treatment, applied in the direction of metal material coating process, etc., can solve problems such as environmental pollution, and achieve the effects of avoiding surface strains or cracks, good wear resistance, and reducing friction.

Active Publication Date: 2021-10-08
豪梅特紧固件系统(苏州)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The stainless steel blackening agent of the invention can blacken stainless steel at normal temperature, the blackening speed is fast, the color is black, uniform, the binding force is good, and there is no irritating smell, but the blackening agent disclosed in this application contains selenium dioxide , will cause environmental pollution to a certain extent

Method used

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  • Bolt surface blackening treatment liquid and blackening treatment method thereof
  • Bolt surface blackening treatment liquid and blackening treatment method thereof
  • Bolt surface blackening treatment liquid and blackening treatment method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Embodiment 1 A kind of bolt surface blackening treatment liquid

[0047] Contains the following components:

[0048] A component:

[0049]

[0050] B component:

[0051]

[0052] The bolt surface blackening treatment process includes the following steps:

[0053] The bolts are cleaned, degreased, washed with water once, derusted, cleaned twice, phosphating / blackened, washed three times, and dried, and the bolts after the blackened treatment are dehydrated and rust-proofed, and the blackened film on the surface is completely dried That is, the blackening process is completed.

[0054] Described degreasing, derusting steps are routine operations in this field;

[0055] Phosphating / blackening treatment: transfer the bolts after secondary cleaning into the blackening tank, now add component A to the blackening tank for phosphating, then add component B for blackening treatment, monitor pH The value is 2.5-3.5, the temperature is 30°C, and the blackening treatment...

Embodiment 2

[0057] Embodiment 2 A kind of bolt surface blackening treatment liquid

[0058] Contains the following components:

[0059] A component:

[0060]

[0061] B component:

[0062]

[0063] The bolt surface blackening treatment process includes the following steps:

[0064] The bolts are cleaned, degreased, washed with water once, derusted, cleaned twice, phosphating / blackened, washed three times, and dried, and the bolts after the blackened treatment are dehydrated and rust-proofed, and the blackened film on the surface is completely dried That is, the blackening process is completed.

[0065] Described degreasing, derusting steps are routine operations in this field;

[0066] Phosphating / blackening treatment: transfer the bolts after secondary cleaning into the blackening tank, now add component A to the blackening tank for phosphating, then add component B for blackening treatment, monitor pH The value is 2.5-3.5, the temperature is 50°C, and the blackening treatment t...

Embodiment 3

[0068] Embodiment 3 A kind of bolt surface blackening treatment liquid

[0069] Contains the following components:

[0070] A component:

[0071]

[0072] B component:

[0073]

[0074]

[0075] The bolt surface blackening treatment process includes the following steps:

[0076] The bolts are cleaned, degreased, washed with water once, derusted, cleaned twice, phosphating / blackened, washed three times, and dried, and the bolts after the blackened treatment are dehydrated and rust-proofed, and the blackened film on the surface is completely dried That is, the blackening process is completed.

[0077] The steps of degreasing, rust removal, water washing, cleaning and drying are all conventional operations in this field;

[0078] Phosphating / blackening treatment: transfer the bolts after secondary cleaning into the blackening tank, now add component A to the blackening tank for phosphating, then add component B for blackening treatment, monitor pH The value is 2.5-3...

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PUM

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Abstract

The invention provides bolt surface blackening treatment liquid. The bolt surface blackening treatment liquid is characterized by comprising a component A and a component B, wherein the component A comprises 10-18 mL/L of phosphoric acid, 5-8 mL/L of nitric acid, 8-12 g/L of zinc oxide, and 4-8 g/L of an auxiliary agent I; the component B comprises 3-6 g/L of copper sulfate, 2-5 g/L of nickel sulfate, 2-3 g/L of EDTA, 5-8 g/L of sodium nitrate, 5-10 mL/L of sulfonic acid, and 1.5-2 g/L of an auxiliary agent II. The blackening treatment liquid is used for treating bolts, blackened film crystals are very fine and dense, the color is black and uniform, and the bolt blackening treatment liquid has very good corrosion resistance; a formed film layer has good wear resistance, friction can be reduced, surface strain or cracks are avoided, and the service life of a workpiece can be prolonged.

Description

technical field [0001] The invention belongs to the technical field of metal surface treatment, and in particular relates to a bolt surface blackening treatment liquid and a blackening treatment method thereof. Background technique [0002] Steel surface blackening treatment is a surface protection and decoration technology widely used in mechanical parts, precision instruments, meters, weapons and daily necessities, especially for precision instruments that cannot be electroplated and painted. At present, the methods of metal surface blackening treatment include: steel high temperature oxidation method, electrolyte electrolysis method and normal temperature blackening process, etc., due to the traditional high temperature oxidation method has a long processing cycle, high temperature required, high labor intensity, and harsh working environment , high energy consumption and low efficiency. Since the 1980s, after a lot of development and research work, a variety of blackeni...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C22/13C23C22/78
CPCC23C22/13C23C22/78
Inventor 卢毅晨潘学智吴建强李啸
Owner 豪梅特紧固件系统(苏州)有限公司
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