Alkaline surface bluing liquid and bluing treatment process thereof

An alkaline, mass percentage technology, applied in the field of metal surface treatment, can solve the problem of uneven film formation of bluing film, and achieve the effect of reducing the cost of bluing, improving protection and uniform film formation

Inactive Publication Date: 2017-05-10
ENG EQUIP CO LTD SUZHOU SAI SIDE
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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 propose an alkaline surface bluing liquid and its bluing treatment process in view of the above shortcomings of the prior art, which can effectively improve the unevenness of bluing film formation and the formation of uniform oxide film Stable, uniform film formation, good surface quality, greatly improving the protection of metals

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] A kind of alkaline surface bluing solution provided in this embodiment, the mass percent of its chemical composition is: Sodium phosphate: 8%; Sodium nitrate: 7%; Sodium hydroxide: 16%; Sodium nitrite: 4%; Triethanolamine : 3%; potassium nitrate: 6%; passivator 5%; phosphating accelerator: 3%; the balance is water;

[0040] The mass percent of the chemical composition of the phosphating accelerator is: sodium nitrite: 19%, magnesium oxide: 6%, phosphoric acid: 3%, sodium dodecylbenzenesulfonate: 1%, salicylic acid: 4%; The balance is zinc oxide;

[0041] The mass percent of the chemical composition of the passivator is: nitric acid: 6%, phosphoric acid: 12%, hydrogen peroxide 5%, zinc phosphate 1%, magnesium nitrate 5%, sodium alkyl sulfate: 1%, and the balance is water.

[0042] This embodiment uses alkaline surface bluing solution to carry out the treatment process of surface bluing, including the following steps: sample—cleaning with cold water—chemical degreasing—...

Embodiment 2

[0048] A kind of alkaline surface bluing solution provided in this embodiment, the mass percent of its chemical composition is: Sodium phosphate: 10%; Sodium nitrate: 8%; Sodium hydroxide: 17%; Sodium nitrite: 6%; Triethanolamine : 4%; potassium nitrate: 9%; passivator 5%; phosphating accelerator: 4%; the balance is water;

[0049] The mass percent of the chemical composition of the phosphating accelerator is: sodium nitrite: 20%, magnesium oxide: 8%, phosphoric acid: 5%, sodium dodecylbenzenesulfonate: 2%, salicylic acid: 4%- ; The balance is zinc oxide;

[0050] The mass percent of the chemical composition of the passivating agent is: nitric acid: 7%, phosphoric acid: 14%, hydrogen peroxide 6%, zinc phosphate 3%, magnesium nitrate: 7%, sodium alkyl sulfate: 2%, balance for water.

[0051] This embodiment uses alkaline surface bluing solution to carry out the treatment process of surface bluing, including the following steps: sample—cleaning with cold water—chemical degreas...

Embodiment 3

[0057] A kind of alkaline surface bluing solution provided in this embodiment, the mass percent of its chemical composition is: Sodium phosphate: 12%; Sodium nitrate: 9%; Sodium hydroxide: 18%; Sodium nitrite: 8%; Triethanolamine : 5%; potassium nitrate: 12%; passivator: 6%; phosphating accelerator: 5%; the balance is water;

[0058] The mass percent of the chemical composition of the phosphating accelerator is: sodium nitrite: 21%, magnesium oxide: 10%, phosphoric acid: 6%, sodium dodecylbenzenesulfonate: 3%, salicylic acid: 5%; The balance is zinc oxide;

[0059] The mass percent of the chemical composition of the passivator is: nitric acid: 8%, phosphoric acid: 15%, hydrogen peroxide 8%, zinc phosphate 5%, magnesium nitrate 10%, sodium alkyl sulfate: 3%, and the balance is water.

[0060] This embodiment uses alkaline surface bluing solution to carry out the treatment process of surface bluing, including the following steps: sample—cleaning with cold water—chemical degrea...

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PUM

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Abstract

The invention discloses an alkaline surface bluing liquid which comprises the following chemical components by weight percent: 8%-12% of sodium phosphate, 7%-9% of sodium nitrate, 16-18% of sodium hydroxide, 4%-8% of sodium nitrite, 3%-5% of triethanolamine, 6%-12% of potassium nitrate, 5%-6% of passivator, 3%-5% of phosphorization accelerant and the balance of water. According to the invention, low-cost sodium nitrate is adopted for replacing the high-cost sodium nitrite, so that the bluing cost can be lowered; the operation process is simple; the experiment condition is easily realized; the surface bluing treatment process provided by the invention is easy in operation, short in time consumption, simple in operation process, easy in meeting the experiment condition and capable of effectively solving the problem of uneven molded bluing film.

Description

technical field [0001] The invention relates to a bluing liquid and a treatment method thereof, in particular to an alkaline surface bluing liquid and a bluing treatment process thereof, belonging to the technical field of metal surface treatment. Background technique [0002] Bluing refers to the material protection technology of heating steel in the air or directly immersing it in a concentrated oxidizing solution to produce a very thin oxide film on the surface, also known as blackening. It is one of the simplest and most effective surface treatment processes indispensable in mechanical parts. The purpose of bluing is to improve the anti-rust ability and make the color beautiful. The alkaline high-temperature bluing of steel has the functions of anti-corrosion, decoration, lubrication and elimination of quenching stress. The ferroferric oxide formed at high temperature is sky blue, so it is called For bluing treatment, it is often used in the weapon industry; the ferric ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C22/62
CPCC23C22/62
Inventor 陈平
Owner ENG EQUIP CO LTD SUZHOU SAI SIDE
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