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A kind of multifunctional trivalent chromium passivator capable of continuously and rapidly treating the surface of strip steel and its preparation method and application

A multi-functional, trivalent chromium technology, applied in the coating process of metal materials, etc., can solve the problems of single function, unsatisfactory, carcinogenic and teratogenic, etc., and achieve the effect of solving blackening, convenient on-site operation, and low odor

Active Publication Date: 2020-05-12
SHENYANG PARKERIZING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The hexavalent chromium passivation agent is simple to operate, low in cost, and easy to control, and the obtained passivation film has the advantages of good corrosion resistance, beautiful appearance, and self-repairing ability, etc. However, hexavalent chromium is a highly toxic substance , has carcinogenic and teratogenic effects, and cannot meet the requirements of EU RoHS standards for heavy metals such as cadmium, mercury, lead, and hexavalent chromium
At this stage, a large number of trivalent chromium passivators are used in the continuous galvanizing production line of steel mills. They are coated on the surface of steel plates by roller coaters to form a passivation film quickly and evenly, but their functions are relatively single, only anti-corrosion and anti-rust functions.

Method used

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  • A kind of multifunctional trivalent chromium passivator capable of continuously and rapidly treating the surface of strip steel and its preparation method and application
  • A kind of multifunctional trivalent chromium passivator capable of continuously and rapidly treating the surface of strip steel and its preparation method and application
  • A kind of multifunctional trivalent chromium passivator capable of continuously and rapidly treating the surface of strip steel and its preparation method and application

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Experimental program
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Effect test

Embodiment 1

[0024] (1) The composition of the multifunctional trivalent chromium passivator that can continuously and rapidly process the surface of the strip steel

[0025]

[0026] (2) Preparation method

[0027] In pure water, under medium-speed stirring at 500r / min, add lactic acid and stir for 10 minutes; add phosphoric acid and stir for 10 minutes; add hydrofluoric acid and stir for 10 minutes; add nitric acid and stir for 10 minutes; Complete hydrolysis; add liquid fumed silica and stir for 10 minutes; add ammonium fluoride and stir for 10 minutes; add cobalt nitrate and stir for 10 minutes; add non-ionic oxidized polyethylene wax and stir for 5 minutes; add chromium nitrate and stir for 10 minutes; add fatty alcohol polyoxyethylene ether and stir for 7 minutes , and stir evenly to obtain the target product.

Embodiment 2

[0029] (1) The composition of the multifunctional trivalent chromium passivator that can continuously and rapidly process the surface of the strip steel

[0030]

[0031]

[0032] (2) Preparation method

[0033] In pure water, under medium-speed stirring at 500r / min, add acetic acid and stir for 10 minutes; add citric acid and stir for 10 minutes; add phosphoric acid and stir for 10 minutes; add nitric acid and stir for 10 minutes; add epoxy silane coupling agent and stir for 30 minutes to couple the silane Add liquid fumed silica and stir for 10 minutes; add potassium nitrate and stir for 10 minutes; add sodium dihydrogen phosphate and stir for 10 minutes; add ammonium fluoride and stir for 10 minutes; add cobalt nitrate and stir for 10 minutes; add non-ionic oxidized polyethylene wax and stir for 5 minutes; Add chromium sulfate and stir for 10 minutes; add chromium phosphate and stir for 10 minutes; add fatty alcohol polyoxyethylene ether and stir for 7 minutes, and st...

Embodiment 3

[0035] (1) The composition of the multifunctional trivalent chromium passivator that can continuously and rapidly process the surface of the strip steel

[0036]

[0037]

[0038] (2) Preparation method

[0039] In pure water, under medium-speed stirring at 500r / min, add acetic acid and stir for 10 minutes; add oxalic acid and stir for 10 minutes; add nitric acid and stir for 10 minutes; add hydrofluoric acid and stir for 10 minutes; Stir the silane coupling agent for 30 minutes to completely hydrolyze the silane; add sodium nitrate and stir for 10 minutes; add cobalt nitrate and stir for 10 minutes; add non-ionic oxidized polyethylene wax and stir for 5 minutes; add chromium dihydrogen phosphate and stir for 10 minutes; add fatty alcohol polyoxyethylene ether and stir for 7 minutes , and stir evenly to obtain the target product.

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PUM

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Abstract

The invention relates to a multifunctional trivalent chromium passivation agent capable of continuously and quickly treating surfaces of strip steel and a preparation method and application thereof. The trivalent chromium passivation agent is prepared by a trivalent chromium compound, a liquid gas-phase silicon dioxide or silane coupling, a complexing agent, inorganic acid, a coalescing agent, emulsion, a wetting agent and water. The trivalent chromium passivation agent achieves high corrosion resistance, damp and hot resistance, water resistance, high-temperature resistance, lubricity, alkaliresistance, solvent resistance, coating property and a certain self-repair capacity, and can quickly and continuously form uniform and compact nanoscale oxide conversion films on the surfaces of steel plates. The passivation agent is short in film forming time and suitable for a roller coater continuous coating production line for strip steel high-speed production.

Description

technical field [0001] The invention relates to a multifunctional trivalent chromium passivator used in a high-speed continuous galvanizing production line of a steel plant to quickly form a passivation film on the surface of a steel plate, a preparation method and application thereof. Background technique [0002] With the growth of my country's economic strength, the demand for steel plates in the automobile industry, home appliance industry and construction industry has continued to increase, and the requirements for plate quality and environmental protection have also continued to increase. The application of galvanized sheets in these industries is doubling every year, and the requirements for anti-corrosion and anti-rust of galvanized sheets are also getting higher and higher. Because zinc is often used as a protective layer for steel due to its low reduction potential and low price, but it is easily corroded due to its active chemical properties, so it is usually nece...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C22/36C23C22/47C23C22/08
CPCC23C22/08C23C22/36C23C22/47C23C2222/10C23C2222/20
Inventor 杨维毅夏雨周宪民
Owner SHENYANG PARKERIZING
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