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Stainless steel pickling passivation cream with high transparency and high viscosity and preparation method thereof

A technology of pickling passivation and high transparency, applied in the coating process of metal materials, etc., can solve the problems of white spot and pitting, easy to corrode the substrate, reduce brightness, etc., achieve no white spot and pitting, high brightness , high transparency and viscosity effect

Inactive Publication Date: 2014-05-28
苏州禾川化学技术服务有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the existing pickling passivation paste is easy to corrode the substrate, reduce the brightness, cause white spots and pitting, and the cost is high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A high-transparency and high-viscosity stainless steel pickling passivation paste, which is prepared from the following raw materials:

[0028] 15 parts of hydrofluoric acid (40%), 30 parts of nitric acid (50%), 35 parts of magnesium nitrate hexahydrate, 3 parts of benzotriazole, 0.5 part of sodium tripolyphosphate, 16.5 parts of water;

[0029] A preparation method of high-transparency high-viscosity stainless steel pickling passivation paste, comprising the following steps:

[0030] 1) Prepare the raw materials of the above weight;

[0031] 2) 30 parts of nitric acid, 35 parts of magnesium nitrate hexahydrate, and 10 parts of water were mixed and stirred evenly to obtain a uniform solution;

[0032] 3) Add 0.5 parts of sodium tripolyphosphate and 6.5 parts of water to the above solution, and stir until completely dissolved;

[0033] 4) Add 15 parts of hydrofluoric acid to the above solution, first fast and then slow, and a transparent paste can be obtained after the...

Embodiment 2

[0037] A high-transparency and high-viscosity stainless steel pickling passivation paste, which is prepared from the following raw materials:

[0038] 15 parts of hydrofluoric acid (45%), 21 parts of nitric acid (68%), 20 parts of magnesium nitrate hexahydrate, 15 parts of magnesium sulfate heptahydrate, 2 parts of calcium oxalate, 1 part of sodium molybdate, 0.5 part of urotropine, 25.5 parts of water;

[0039] A preparation method of high-transparency high-viscosity stainless steel pickling passivation paste, comprising the following steps:

[0040] 1) Prepare the raw materials of the above weight;

[0041] 2) Mix and stir 21 parts of nitric acid, 15 parts of magnesium sulfate heptahydrate, 20 parts of magnesium nitrate hexahydrate, and 20 parts of water to obtain a uniform solution;

[0042] 3) Add 1 part of sodium molybdate, 2 parts of calcium oxalate and 5.5 parts of water to the above solution, and stir until completely dissolved;

[0043] 4) Add 15 parts of hydrofluo...

Embodiment 3

[0047] A high-transparency and high-viscosity stainless steel pickling passivation paste, which is prepared from the following raw materials:

[0048] 19 parts of hydrofluoric acid (45%), 35 parts of nitric acid (68%), 16 parts of magnesium sulfate heptahydrate, 8 parts of magnesium fluoride, 3 parts of sodium metasilicate, 0.5 part of calcium stearate, 18.5 parts of water;

[0049] A preparation method of high-transparency high-viscosity stainless steel pickling passivation paste, comprising the following steps:

[0050] 1) Prepare the raw materials of the above weight;

[0051] 2) 35 parts of nitric acid, 16 parts of magnesium sulfate heptahydrate, and 8 parts of magnesium fluoride were evenly stirred to obtain a homogeneous solution;

[0052] 3) Add 3 parts of sodium metasilicate and 18.5 parts of water to the above solution, and stir until completely dissolved;

[0053] 4) Add 19 parts of hydrofluoric acid to the above solution, and a transparent paste can be obtained af...

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Abstract

The invention discloses a stainless steel pickling passivation cream with high transparency and high viscosity. The stainless steel pickling passivation cream comprises the following components by the weight percentage: 10-20 parts of a corrodent, 20-40 parts of a passivating agent, 20-40 parts of an inorganic filler, 2-6 parts of a corrosion inhibitor, 0.5-2 parts of a thickening agent, and 10-35 parts of a viscosity regulator. The stainless steel pickling passivation cream with high transparency and high viscosity has the appearance with higher transparency and viscosity, and thus the progress of polishing is convenient to observe; the stainless steel pickling passivation cream is suitable for any electric welded or argon-arc welded stainless steel welded scars, stainless steel equipment and workpieces, and has more efficient polishing effects and more rapid polishing rate; and the stainless steel pickling passivation cream does not corrode basal materials, is high in brightness, has no white spots and pocking marks, and besides can reduce the cost of the pickling passivation cream.

Description

technical field [0001] The invention relates to chemicals for stainless steel, in particular to a high-transparency and high-viscosity stainless steel pickling passivation paste. Background technique [0002] Stainless steel is a material widely used in modern industry. Stainless steel pickling and passivation techniques are various, typically including spraying method, dipping method, paste method, brushing method, spraying method, circulation method, electrochemical method, etc. However, due to their respective advantages and disadvantages and the difficulty of operation, the paste method has become a popular method for stainless steel surface treatment. [0003] Stainless steel pickling passivation paste is a chemical preparation for removing yellow, blue and black welding spots and scales produced after stainless steel welding and high-temperature processing. It is mainly used for stainless steel surfaces, welds and hot-pressed heads. It is suitable for chemical machiner...

Claims

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Application Information

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IPC IPC(8): C23C22/00C23G5/00C23G1/04C23F11/04
Inventor 景欣欣陈珍珍苏丽敏王婷婷
Owner 苏州禾川化学技术服务有限公司
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