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Steel surface blueing solution and blueing treatment technology thereof

A processing technology and steel technology, applied in the direction of metal material coating process, etc., can solve the problem of uneven film formation of bluing film, and achieve the effect of reducing the cost of bluing, uniform film formation and good surface quality

Inactive Publication Date: 2017-04-26
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 a bluing liquid on the surface of steel 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 and stable oxide film , uniform film formation, good surface quality, greatly improving the protective effect on metal

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] A steel surface bluing solution provided in this example has the following chemical components in mass percent: sodium phosphate: 6%; sodium nitrate: 3%; sodium hydroxide: 10%; sodium nitrite: 8%; triethanolamine: Potassium nitrate: 6%; Passivator 2%; Phosphating accelerator: 1%; Surplus is water; The chemical composition mass percentage of described phosphating accelerator is: sodium nitrite: 13%, magnesium oxide : 8%, phosphoric acid: 3%, sodium dodecylbenzene sulfonate: 1%, salicylic acid: 1%; EDTA: 2%, balance is zinc oxide; The chemical composition mass percent of described passivating agent is : Nitric acid: 6%, phosphoric acid: 12-15%, hydrogen peroxide 5%, urotropine: 0.5%, zinc phosphate 1%, magnesium nitrate 5%, sodium alkyl sulfate: 1%, the balance is water .

[0040] This embodiment utilizes the process of steel surface bluing processing steel, including the following steps: sample → cold water cleaning → chemical degreasing → hot water washing → cold water...

Embodiment 2

[0047] A steel surface bluing solution provided in this example has the following mass percentages of chemical components: sodium phosphate: 8%; sodium nitrate: 4%; sodium hydroxide: 12%; sodium nitrite: 9%; triethanolamine: 1%; Potassium nitrate: 8%; Passivator: 3%; Phosphating accelerator: 1%; Magnesium: 10%, phosphoric acid: 4%, sodium dodecylbenzenesulfonate: 2%, salicylic acid: 2%; EDTA: 3%, the balance is zinc oxide; the chemical composition mass percentage of the passivating agent For: Nitric acid: 7%, Phosphoric acid: 13%, Hydrogen peroxide: 7%, Methanol: 1%, Zinc phosphate: 2%, Magnesium nitrate: 7%, Sodium alkyl sulfate: 2%, The balance is water.

[0048] This embodiment utilizes the process of steel surface bluing processing steel, including the following steps: sample → cold water cleaning → chemical degreasing → hot water washing → cold water cleaning → pickling and derusting → water washing → bluing → water washing and drying quickly → finished product ;

[004...

Embodiment 3

[0054] A steel surface bluing solution provided in this example has the following mass percentages of chemical components: sodium phosphate: 10%; sodium nitrate: 5%; sodium hydroxide: 15%; sodium nitrite: 10%; triethanolamine: 2%; potassium nitrate: 12%; passivator: 4%; phosphating accelerator: 2%; the balance is water;

[0055] The mass percent of the chemical composition of the phosphating accelerator is: sodium nitrite: 18%, magnesium oxide: 11%, phosphoric acid: 6%, sodium dodecylbenzenesulfonate: 3%, salicylic acid: 2%; EDTA: 4%, the balance is zinc oxide;

[0056] The mass percent of the chemical composition of the passivating agent is: nitric acid: 8%, phosphoric acid: 15%, hydrogen peroxide: 8%, methenamine: 1%, zinc phosphate: 5%, magnesium nitrate: 10%, alkane Sodium base sulfate: 3%, the balance is water.

[0057] This embodiment utilizes the process of steel surface bluing processing steel, including the following steps: sample → cold water cleaning → chemical de...

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PUM

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Abstract

The invention discloses a steel surface blueing solution which is prepared from, by mass, 6%-10% of sodium phosphate, 3%-5% of sodium nitrate, 10%-15% of sodium hydroxide, 8%-10% of sodium nitrite, 1%-2% of triethanolamine, 6%-12% of potassium nitrate, 2%-4% of passivator, 1%-2% of phosphorization accelerant and the balance water. The sodium nitrite relatively high in price is replaced with some sodium nitrate low in price, the blueing cost can be reduced, the operation process is simple, and experiment conditions are easy to meet. According to a surface blueing treatment technology, operation is easy, operation time is short, the operation process is simple, experiment conditions are easy to meet, and the problems that a blueing film is not uniform in film formation and the like can be effectively relieved.

Description

technical field [0001] The invention relates to a bluing liquid and a processing method thereof, in particular to a steel 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 oxi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C22/17
CPCC23C22/17
Inventor 钱燕华陈平
Owner ENG EQUIP CO LTD SUZHOU SAI SIDE
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