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A kind of 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 environmental hazards, short life, poor coating adhesion, etc. Effect

Active Publication Date: 2017-11-03
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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  • A kind of environment-friendly stainless steel passivation solution and preparation method thereof

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Effect test

Embodiment 1

[0040] A kind of environment-friendly stainless steel passivation solution, by weight, comprises the following components:

[0041] 10 parts of citric acid, 5 parts of 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 50mL cyclohexane and 10mL triethylamine evenly, then add 1mL oleic acid, stir for 5min, then add 1mL tetrabutyl titanate at a speed of 1.15mL / min, and stir for 20min to obtain a light yellow solution , transferred to an autoclave, reacted for 20 hours at 160°C, and cooled to room temperature to obtain nano-titanium oxide sol;

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

Embodiment 2

[0050] A kind of environment-friendly stainless steel passivation solution, 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 50mL cyclohexane and 10mL triethylamine evenly, then add 1mL oleic acid, stir for 10min, then add 3mL tetrabutyl titanate at a rate of 2.5mL / min, and stir for 30min to obtain a light yellow solution , transferred to an autoclave, reacted for 40 hours at 180°C, and cooled to room temperature to obtain nano-titanium oxide sol;

[0058](2) Add citric acid, salicylic acid, hydrogen peroxide, sodium citrate and sodium molybdate to the nano-titanium oxide sol obta...

Embodiment 3

[0060] A kind of environment-friendly stainless steel passivation solution, by weight, comprises the following components:

[0061] 13 parts of citric acid, 7 parts of 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 50mL cyclohexane and 10mL triethylamine evenly, then add 1mL oleic acid, stir for 6min, then add 1.5mL tetrabutyl titanate at a speed of 1.3mL / min, and stir for 22min to obtain light yellow The solution was transferred to an autoclave, reacted for 25 hours at 165°C, and cooled to room temperature to obtain nano-titanium oxide sol;

[0068] (2) Add citric acid, salicylic acid, hydrogen peroxide, sodium citrate and sodium molybdate to the nano-titanium oxide sol ob...

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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 passivation solution for stainless steel. 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, and aggressive anions (such as Cl - ) exists, stainless steel will undergo dangerous localized corrosion, which may cause economic losses, 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 harsh. Nitric acid-based formulations for passivation are gradually being replaced as re...

Claims

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Application Information

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