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Alkaline chemical cleaning agent for electrogalvanizing pretreatment

A cleaning agent, a technology for electro-galvanized sheet, applied in the field of cleaning agents, can solve problems such as unreported, and achieve the effects of wide applicability, wide operating temperature range and long service life

Inactive Publication Date: 2017-12-19
武汉钢铁有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In summary, there are many people at home and abroad studying alkaline cleaning agents for cleaning the surface of cold-rolled steel sheets, but there is no report on a fast and efficient alkaline chemical cleaning agent for pretreatment of electro-galvanized sheets, and it is urgent to develop a fast and efficient chemical cleaning agent. Electro-galvanized pre-treatment chemical cleaning agent to meet the needs of electro-galvanized pre-treatment

Method used

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  • Alkaline chemical cleaning agent for electrogalvanizing pretreatment

Examples

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Comparison scheme
Effect test

Embodiment 1

[0032] A chemical cleaning agent for pretreatment of electro-galvanized sheets, the components and their mass percentages include: 35% sodium hydroxide, 40% sodium carbonate, 5% trisodium phosphate, 5% sodium benzoate, 9.5% sodium citrate, Nonylphenol polyoxyethylene ether surfactant 5%, polyether type defoamer 0.5%; weigh each raw material chemical cleaning agent according to the above ratio conditions, stir and mix the weighed raw materials evenly, and obtain the pretreatment of electro-galvanized sheet Use chemical cleaners.

[0033] The chemical cleaning agent obtained in this example is added with water to prepare a mixed solution with a total concentration of each component of 3%, which is used to chemically clean electrogalvanized sheets (cold-rolled sheets with a plate thickness of 0.5mm). The specific parameters are as follows: cleaning temperature The temperature is 80°C, the spray cleaning pressure is 0.5MPa, and the spray cleaning time is 10s.

[0034] During the ...

Embodiment 2

[0037] A chemical cleaning agent for pretreatment of electro-galvanized sheets, the components and their mass percentages include: 20% sodium hydroxide, 35% sodium carbonate, 15% trisodium phosphate, 10% sodium benzoate, 7% sodium citrate, Nonylphenol polyoxyethylene ether surfactant 11%, polyether type defoamer 2%; weigh each raw material chemical cleaning agent according to the above proportioning conditions, stir and mix the weighed raw materials evenly, and obtain the pretreatment of electro-galvanized sheet Use chemical cleaners.

[0038] The chemical cleaning agent obtained in this example is added with water to prepare a mixed solution with a total concentration of each component of 2.5%, which is used to chemically clean electrogalvanized sheets (cold-rolled sheets with a plate thickness of 0.8mm). The specific parameters are as follows: cleaning temperature The temperature is 70°C, the spray cleaning pressure is 0.25MPa, and the spray cleaning time is 5s.

[0039] Duri...

Embodiment 3

[0041] A chemical cleaning agent for pretreatment of electro-galvanized sheets, the components and their mass percentages include: 16% sodium hydroxide, 55% sodium carbonate, 6% trisodium phosphate, 6% sodium benzoate, 10% sodium citrate, Nonylphenol polyoxyethylene ether surfactant 6%, polyether type defoamer 1%; weigh each raw material chemical cleaning agent according to the above ratio conditions, stir and mix the weighed raw materials evenly to obtain the pretreatment of electro-galvanized sheet Use chemical cleaners.

[0042] The chemical cleaning agent obtained in this embodiment is added with water to prepare a mixed solution with a total concentration of each component of 2%, which is used to chemically clean electrogalvanized sheets (cold-rolled sheets with a plate thickness of 1.0mm). The specific parameters are as follows: cleaning temperature The temperature is 90°C, the spray cleaning pressure is 0.4MPa, and the spray cleaning time is 15s.

[0043] During the sp...

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Abstract

The invention provides an alkaline chemical cleaning agent for electrogalvanizing pretreatment. The alkaline chemical cleaning agent for electrogalvanizing pretreatment comprises, by mass, 15%-35% of sodium hydroxide, 25%-55% of sodium carbonate, 5%-30% of trisodium phosphate, 5%-15% of sodium benzoate, 3%-10% of sodium citrate, 5%-15% of polyoxyethylene nonyl phenyl ether surface active agent and 0.5%-2% of polyether type antifoaming agent. The alkaline chemical cleaning agent can effectively restrain generation of foams in the sprinkling process and is rapid in degreasing, high in dirt removing capacity, good in cleaning effect, high in pH value buffering capacity, stable in hard water, long in service life, wide in application temperature range and capable of effectively improving the adhesive force of an electrogalvanizing layer. The alkaline chemical cleaning agent can meet the requirements, for the time and cleaning efficiency of cleaning pretreatment of a galvanizing substrate, of a large-scale electrogalvanizing production technology and has important industrial popularization significance.

Description

technical field [0001] The invention belongs to the technical field of cleaning reagents, and in particular relates to an alkaline chemical cleaning agent for electrogalvanizing pretreatment. Background technique [0002] Electrogalvanized substrates usually remove oil, iron powder and other residues and oxides on the surface of the strip through chemical degreasing, brushing, electrolytic degreasing and pickling to obtain a clean and activated surface; then zinc is plated in multiple sets of electroplating tanks, and then The desired surface for automotive panels is obtained by activator treatment and phosphating. If producing home appliances or ordinary electro-galvanized sheets, the surface is passivated by a roller coater or coated with a fingerprint-resistant film, and then coated with anti-rust oil by an electrostatic oiler after drying in the infrared. Degreasing and cleaning is one of the very important links in the pretreatment process of electro-galvanized steel s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23G1/19C23G1/18C25D5/36
CPCC23G1/19C23G1/18C25D5/36
Inventor 涂元强蔡捷白会平董蓓杜蓉黄道兵冯冠文宋乙峰雷泽红杨宏武
Owner 武汉钢铁有限公司
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