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Preparation method of waterborne galvanized passivating liquid

A passivation solution, water-based technology, applied in the coating process of metal materials, etc., can solve the problems of affecting the corrosion resistance of the passivation film, micro cracks on the surface of the passivation film, and poor film forming effect, so as to achieve uniform appearance and improve Oxidation performance, effect of improving film formation stability

Inactive Publication Date: 2017-09-15
谢新昇
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The technical problem mainly solved by the present invention: Aiming at the problem that the traditional chromium-free galvanizing passivation solution has poor film formation effect during use, and the surface of the formed passivation film has microcracks, which affects the corrosion resistance of the passivation film, a solution is provided. A kind of preparation method of water-based galvanizing passivation solution

Method used

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  • Preparation method of waterborne galvanized passivating liquid

Examples

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example 1

[0021] First weigh 30g of polyvinyl alcohol, pour it into a beaker containing 800mL of water, stir and mix with a glass rod for 10min, let it stand for 3h, and then move the beaker into a digital-display speed-measuring constant temperature magnetic stirrer, the temperature is 88°C, and the rotation speed is Under the condition of 400r / min, stir and mix at a constant temperature for 60min to obtain a dispersion liquid. Take 100mL of titanium tetrachloride solution with a concentration of 2.0mol / L and 100mL of potassium chloride solution with a concentration of 1.0mol / L in turn, and crush 20g of activated carbon to 120 mesh. , pour it into a three-necked flask, and then move the three-necked flask into a digital-display speed measuring constant temperature magnetic stirrer. Under the conditions of a temperature of 65 °C and a rotation speed of 400 r / min, the constant temperature stirring reaction is performed for 2 hours. When the constant temperature stirring reaction is complet...

example 2

[0023]First, weigh 40 g of polyvinyl alcohol, pour it into a beaker containing 900 mL of water, stir and mix with a glass rod for 13 minutes, let it stand for 4 hours, and then move the beaker into a digital speed measuring constant temperature magnetic stirrer at a temperature of 89 °C and a rotation speed of Under the condition of 500r / min, stir and mix at a constant temperature for 75min to obtain a dispersion liquid, take 110mL of titanium tetrachloride solution with a concentration of 2.3mol / L, 105mL of potassium chloride solution with a concentration of 1.1mol / L, and 25g crushed to 140 mesh activated carbon , pour it into the three-necked flask, and then move the three-necked flask into the digital-display speed measuring constant temperature magnetic stirrer. Under the condition of temperature of 68°C and rotation speed of 500r / min, constant temperature stirring reaction is carried out for 3h. When the constant temperature stirring reaction is over, adjust the stirring sp...

example 3

[0025] First, weigh 50g of polyvinyl alcohol and 60g of sodium silicate, pour them into a beaker containing 1000mL of water, stir and mix with a glass rod for 15min, let stand for 5h, and then move the beaker into a digital speed measuring constant temperature magnetic stirrer, at a temperature of Under the condition of 90 ℃, rotating speed of 600r / min, constant temperature stirring and mixing for 90min, a dispersion liquid was obtained, 120mL of titanium tetrachloride solution with concentration of 2.5mol / L, 110mL of potassium chloride solution with concentration of 1.2mol / L were taken in turn, 30g Grind to 160 mesh of activated carbon, pour it into a three-necked flask, and then move the three-necked flask into a digital-display velocity-measuring constant temperature magnetic stirrer. Under the conditions of a temperature of 70 °C and a rotation speed of 600 r / min, the constant temperature stirring reaction is performed for 4 hours, and the constant temperature stirring react...

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Abstract

The invention discloses a preparation method of waterborne galvanized passivating liquid and belongs to the technical field of metal additive preparation. Firstly, polyvinyl alcohol, sodium silicate and water are mixed and then swell, the mixture is heated, stirred and dissolved, and dispersion liquid is prepared; then titanium tetrachloride serves as a titanium source, potassium chloride serves as a potassium source, titanium tetrachloride and potassium chloride react with sodium hydroxide to form a precursor, the precursor is adsorbed in combination with the excellent adsorption performance of active carbon, after the active carbon is removed through calcination, the material is further heated and calcined, and a calcined material is prepared; potassium chlorate is decomposed through heating, potassium perchlorate and potassium chloride with high oxidability are generated, potassium chloride is removed through the solubility difference, potassium perchlorate and potassium permanganate are compounded, and a mixed solution is prepared; and finally the dispersion liquid, the mixed solution, the calcined material and other auxiliaries are ultrasonically dispersed, and the environment-friendly waterborne galvanized passivating liquid is prepared. The obtained environment-friendly waterborne galvanized passivating liquid can form a stable passivation film, the film is not likely to crack after being formed, the anticorrosion performance is good, and wide application prospects are achieved.

Description

technical field [0001] The invention discloses a preparation method of an aqueous galvanizing passivation solution, and belongs to the technical field of metal additive preparation. Background technique [0002] Galvanizing (including electrogalvanizing and hot-dip galvanizing) is one of the largest plating types in all metal surface deposition treatments. It has been widely used in every field of the national economy. Due to its excellent processing performance and good corrosion resistance, it has been widely used in light industry, home appliances, automobiles and construction industries. However, as metals with relatively active chemical properties, zinc, aluminum and copper are prone to corrosion in many environments, such as "white rust" in a humid atmosphere, and "pitting corrosion" in an environment containing chloride ions. In order to improve the surface quality and corrosion resistance of the metal, improve its surface coating performance, and prolong the service...

Claims

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Application Information

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IPC IPC(8): C23C22/53C23C22/08
CPCC23C22/53C23C22/08
Inventor 谢新昇许丽君孙冬
Owner 谢新昇
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