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Environment friendly stainless steel passivation solution and preparation method thereof

A technology of stainless steel and passivation solution, applied in the direction of metal material coating process, etc., can solve the problems of poor coating performance of passivation film, poor coating adhesion, poor corrosion resistance, etc., to achieve good corrosion resistance, low preparation cost, The effect of cheap raw materials

Active Publication Date: 2016-02-10
NANJING WORLD SPECIAL STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The formula of passivation solution can effectively form a coating on the surface of the coating and play a good role in protection, but its adhesion to the coating is poor, and it contains lead, which is harmful to the environment
[0005] Chinese patent (200810154249.2) discloses a volume formula of stainless steel passivation solution, including 3% citric acid, 10% hydrogen peroxide and 5% ethanol. Low cost, but poor corrosion resistance and short life
[0006] Chinese patent (201310270280.3) discloses a copper alloy surface passivation solution, including citric acid, phytic acid, calcium dihydrogen phosphate, amino trimethylene phosphonic acid, acrylamide, triclosan, polyethylene glycol, hydrogen peroxide, chlorine Cerium chloride, lanthanum chloride and water, the passivation solution does not contain substances that pollute the environment and affect human health, and has an excellent passivation effect and a wide range of applications, but the coating performance of the passivation film is not good, and it is easy to age

Method used

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  • Environment friendly stainless steel passivation solution and preparation method thereof

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Comparison scheme
Effect test

Embodiment 1

[0040] An environmentally friendly stainless steel passivation solution, in parts by weight, comprises the following components:

[0041] 10 parts citric acid, 5 parts salicylic acid,

[0042] 50 parts of hydrogen peroxide, 20 parts of sodium citrate,

[0043] 5 parts of nano titanium dioxide sol,

[0044] 5 parts of stabilizer, 5 parts of corrosion inhibitor,

[0045] 5 parts of sodium molybdate, 50 parts of deionized water.

[0046] Its preparation method comprises the following steps:

[0047] (1) Mix and stir 50 mL of cyclohexane and 10 mL of triethylamine, then add 1 mL of oleic acid, stir for 5 min, then add 1 mL of tetrabutyl titanate at a speed of 1.15 mL / min, and stir for 20 min to obtain a pale yellow solution , transferred to an autoclave, reacted at 160 °C for 20 h, cooled to room temperature, and obtained nano-titanium oxide sol;

[0048] (2) adding citric acid, salicylic acid, hydrogen peroxide, sodium citrate and sodium molybdate to the nano-titanium oxide ...

Embodiment 2

[0050] An environmentally friendly stainless steel passivation solution, in parts by weight, comprises the following components:

[0051] 25 parts of citric acid, 15 parts of salicylic acid,

[0052] 80 parts of hydrogen peroxide, 30 parts of sodium citrate,

[0053] 8 parts of nano titanium dioxide sol,

[0054] 15 parts of stabilizer, 10 parts of corrosion inhibitor,

[0055] 12 parts of sodium molybdate, 100 parts of deionized water.

[0056] Its preparation method comprises the following steps:

[0057] (1) Mix and stir 50 mL of cyclohexane and 10 mL of triethylamine, then add 1 mL of oleic acid, stir for 10 min, then add 3 mL of tetrabutyl titanate at a speed of 2.5 mL / min, and stir for 30 min to obtain a pale yellow solution , transferred to an autoclave, reacted at 180 °C for 40 h, and cooled to room temperature to obtain nano-titanium oxide sol;

[0058](2) adding citric acid, salicylic acid, hydrogen peroxide, sodium citrate and sodium molybdate to the nano titan...

Embodiment 3

[0060] An environmentally friendly stainless steel passivation solution, in parts by weight, comprises the following components:

[0061] 13 parts citric acid, 7 parts salicylic acid,

[0062] 60 parts of hydrogen peroxide, 22 parts of sodium citrate,

[0063] 6 parts of nano titanium dioxide sol,

[0064] 7 parts of stabilizer, 6 parts of corrosion inhibitor,

[0065] 7 parts of sodium molybdate, 60 parts of deionized water.

[0066] Its preparation method comprises the following steps:

[0067] (1) Mix and stir 50 mL of cyclohexane and 10 mL of triethylamine evenly, then add 1 mL of oleic acid, stir for 6 min, then add 1.5 mL of tetrabutyl titanate at a speed of 1.3 mL / min, and stir for 22 min to obtain light yellow The solution was transferred to an autoclave, reacted at 165 ° C for 25 h, and cooled to room temperature to obtain nano-titanium oxide sol;

[0068] (2) adding citric acid, salicylic acid, hydrogen peroxide, sodium citrate and sodium molybdate to the nano-t...

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Abstract

The invention aims at providing an environment friendly stainless steel passivation solution. The environment friendly stainless steel passivation solution comprises the following component of, by weight, 10-25 parts of citric acid, 5-15 parts of salicylic acid, 50-80 parts of hydrogen peroxide, 20-30 parts of sodium citrate, 5-8 parts of nanometer titania sol, 5-15 parts of stabilizing agents, 5-10 parts of inhibiting agents, 5-12 parts of sodium molybdate and 50-100 parts of deionized water. The invention also discloses a preparation method for the environment friendly stainless steel passivation solution. According to the environment friendly stainless steel passivation solution, the passivation effect is good, the binding force of a passivation film and a plating layer is high, and the coating property of the passivation film is good; the environment friendly stainless steel passivation solution has certain ultraviolet-proof property and antibacterial property, is free of toxic substances, and is harmless to the environment and human bodies.

Description

Technical field: [0001] The invention relates to the technical field of metal surface treatment, in particular to an environment-friendly stainless steel passivation solution. Background technique: [0002] Stainless steel is widely used due to its excellent mechanical properties, machinability and corrosion resistance. However, stainless steel is not absolutely stainless, aggressive anions (such as Cl - ), the stainless steel will undergo dangerous localized corrosion, which may cause economic loss, environmental pollution, and even personal injury. Studies have shown that the corrosion resistance of stainless steel surface is greatly improved after passivation treatment. [0003] Traditional stainless steel passivation, strong oxidants such as concentrated nitric acid, concentrated sulfuric acid, and chromic acid have high safety hazards, and the operating conditions are demanding. Nitrate-based formulations for passivation are gradually being replaced as regulations lim...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C22/40
Inventor 李晓明
Owner NANJING WORLD SPECIAL STEEL
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