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Galvanized steel sheet passivating agent and preparation method thereof

A technology of galvanized steel sheet and passivating agent, which is applied in the coating process of metal materials, etc., can solve problems affecting the appearance quality of galvanized steel sheet, coating corrosion resistance, galvanized steel sheet prone to corrosion, etc., to achieve high corrosion resistance and Oxidation resistance, environment-friendly effect

Inactive Publication Date: 2015-03-25
WUXI EPIC TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Although the galvanized steel sheet already has a strong anti-corrosion ability, the galvanized steel sheet is still prone to corrosion in a humid environment, forming white corrosion products or turning gray on the surface, which affects the appearance quality and quality of the galvanized steel sheet. Plating corrosion resistance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A passivator for galvanized steel sheets, the raw materials include in parts by weight: 4 parts of phytic acid, 3 parts of 1-hydroxyethylene diphosphonic acid, 2 parts of nitrilo trimethylene phosphonic acid, ethylenediamine tetramethylene 1 part of phosphonic acid, 3 parts of sodium silicate, 4 parts of sodium formate, 2 parts of polyvinyl alcohol, 1 part of sodium benzoate, 2 parts of triethanolamine, 3 parts of aluminum dihydrogen phosphate, 3 parts of sulfosalicylic acid, acetylacetonate oxygen 2 parts of vanadium, 1 part of γ-aminopropyltriethoxysilane, 2 parts of 2-acrylamido-2-methylpropanesulfonic acid, 3 parts of N, N-dimethylacrylamide, 0.8 parts of silica filler , 5 parts of water-soluble film-forming resin, 10 parts of deionized water.

[0020] The above silica filler is nano silica powder with a particle diameter of 5-30nm; the water-soluble film-forming resin is water-soluble polyester film-forming resin.

[0021] The preparation method of above-mentioned...

Embodiment 2

[0026] A galvanized steel passivator, the raw materials include in parts by weight: 6 parts of phytic acid, 4 parts of 1-hydroxyethylene diphosphonic acid, 3 parts of nitrilo trimethylene phosphonic acid, ethylenediamine tetramethylene 2 parts of phosphonic acid, 4 parts of sodium silicate, 6 parts of sodium formate, 4 parts of polyvinyl alcohol, 3 parts of sodium benzoate, 4 parts of triethanolamine, 5 parts of aluminum dihydrogen phosphate, 4 parts of sulfosalicylic acid, acetylacetonate oxygen 3 parts of vanadium, 2 parts of γ-aminopropyltriethoxysilane, 4 parts of 2-acrylamido-2-methylpropanesulfonic acid, 5 parts of N,N-dimethylacrylamide, 1.5 parts of silica filler , 7 parts of water-soluble film-forming resin, 14 parts of deionized water.

[0027] The silica filler is nano silica sol with a particle diameter of 5-30nm; the water-soluble film-forming resin is water-soluble styrene-acrylic film-forming resin.

[0028] The preparation method of above-mentioned galvanized ...

Embodiment 3

[0033] A passivator for galvanized steel sheets, the raw materials include in parts by weight: 9 parts of phytic acid, 5 parts of 1-hydroxyethylene diphosphonic acid, 6 parts of nitrilo trimethylene phosphonic acid, ethylenediamine tetramethylene 3 parts of phosphonic acid, 5 parts of sodium silicate, 8 parts of sodium formate, 7 parts of polyvinyl alcohol, 6 parts of sodium benzoate, 5 parts of triethanolamine, 7 parts of aluminum dihydrogen phosphate, 6 parts of sulfosalicylic acid, acetylacetonate oxygen 5 parts of vanadium, 3 parts of γ-aminopropyltriethoxysilane, 7 parts of 2-acrylamido-2-methylpropanesulfonic acid, 7 parts of N,N-dimethylacrylamide, 2.7 parts of silica filler , 12 parts of water-soluble film-forming resin, 19 parts of deionized water.

[0034] The silica filler is nano silica powder with a particle size of 5-30nm; the water-soluble film-forming resin is water-soluble epoxy film-forming resin.

[0035] The preparation method of above-mentioned galvanized...

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Abstract

The invention provides a galvanized steel sheet passivating agent and a preparation method thereof. The galvanized steel sheet passivating agent is prepared from the following components: phytic acid, 1-hydroxyl ethylidene bisphosphoric acid, nitrilotrimethylene phosphonic acid, ethanediamine tetramethylene phosphonic acid, sodium silicate, sodium formate, polyvinyl alcohol, sodium benzoate, triethanolamine, aluminum dihydrogen phosphate, sulfosalicylic acid, vanadiumoxy acetylacetonate, gamma-aminopropyltriethoxysilane, 2-acrylamido-2-methyl propane sulfonic acid, N, N-dimethyl acrylamide, silicon oxide filler, water-soluble film-forming resin and deionized water. The preparation method of the galvanized steel sheet passivating agent comprises the following steps: adding phytic acid, 1-hydroxyl ethylidene bisphosphoric acid, nitrilotrimethylene phosphonic acid, ethanediamine tetramethylene phosphonic acid, sodium silicate, sodium formate and polyvinyl alcohol into the deionized water, thereby forming a mixture I; then, mixing parts of the components with the deionized water, thereby forming a mixture II; and finally, mixing the mixture I with the mixture II, and then adding the residual components, thereby forming the galvanized steel sheet passivating agent. The galvanized steel sheet passivating agent does not contain chromium; and a galvanized steel sheet passivated by the galvanized steel sheet passivating agent has relatively high corrosion resistance and oxidization resistance.

Description

technical field [0001] The invention belongs to the field of metal surface treatment chemistry, and in particular relates to a galvanized steel plate passivator and a preparation method thereof. Background technique [0002] Metal passivation treatment refers to the method of converting the metal surface into a state that is not easily oxidized due to the action of the medium, so as to delay the corrosion rate of the metal. The passivation of metals may also be a spontaneous process (such as the formation of a layer of insoluble compounds on the surface of the metal, that is, an oxide film). In industry, passivating agents (mainly oxidizing agents) are used to passivate metals to form a protective film. [0003] Galvanized steel sheet is one of the important protective means of cold-rolled steel sheet, which is widely used in aviation, electric power, transportation, construction, machinery and other industries. The galvanizing process is mainly divided into electro-galvan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C22/07
CPCC23C22/07
Inventor 尤为
Owner WUXI EPIC TECH
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