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Cleaning agent for removing oxidized spots on galvanized sheet and its preparation method and application

A technology of oxidation spot and cleaning agent, applied in the field of cleaning agent, can solve the problems of incomplete removal of oxidation spot, slow removal speed of oxidation spot, large damage to galvanized layer, etc., achieve good cleaning and passivation effect, strong market vitality and practical performance, the effect of using less equipment

Active Publication Date: 2018-05-08
YONGXIN ELECTRONICS CHANGSHU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the galvanized sheet is cleaned with strong acid to remove oxidation spots (oxidized white spots), the damage to the galvanized layer will be greater, which will cause the galvanized sheet to rust and affect the later use
If weak acid is used to clean the oxidation spots (oxidation spots), the removal speed of the oxidation spots (oxidation spots) is slow, and the oxidation spots (oxidation spots) cannot be completely removed, and the effect is poor.

Method used

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  • Cleaning agent for removing oxidized spots on galvanized sheet and its preparation method and application
  • Cleaning agent for removing oxidized spots on galvanized sheet and its preparation method and application
  • Cleaning agent for removing oxidized spots on galvanized sheet and its preparation method and application

Examples

Experimental program
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Effect test

Embodiment 1

[0035] First add 0.5 parts by weight of octylphenol polyoxyethylene ether into 60 parts by weight of water to dissolve, then add 20 parts by weight of phytic acid and 10 parts by weight of acetic acid, stir evenly, then add 6 parts by weight of sodium phytate and 5 parts by weight of sulfuric acid Cerium, stir well.

[0036] The cleaning agent prepared by the above method is easy to store. It only needs to be sealed and stored in a place above 5°C, away from direct sunlight, in a cool and dry place with ventilation, and the storage period is 12 months.

[0037] Use the prepared cleaning agent and adopt the traditional method of dipping to remove oxidation spots (oxidation spots) on the surface of the galvanized sheet to form a passivation film, and expose the steel matrix after the surface of the galvanized sheet, especially the zinc layer is damaged. A passivation film is formed on the part, the immersion temperature is 30°C, and the immersion time is 30 seconds.

[0038] Af...

Embodiment 2

[0047] First add 1 weight part of octylphenol polyoxyethylene ether into 65 parts by weight of water to dissolve, then add 25 parts by weight of phytic acid and 15 parts by weight of acetic acid, stir evenly, then add 8 parts by weight of sodium phytate, 6 parts by weight of sulfuric acid Cerium, stir well.

[0048] The cleaning agent prepared by the above method is easy to store. It only needs to be stored in a place above 5°C, away from direct sunlight, in a cool and dry place with ventilation, and it will not deteriorate for one year in sealed storage.

[0049] Use the prepared cleaning agent and adopt the traditional method of dipping to remove oxidation spots (oxidation spots) on the surface of the galvanized sheet to form a passivation film, and expose the steel matrix after the surface of the galvanized sheet, especially the zinc layer, is damaged. A passivation film is formed on the part, the immersion temperature is 20°C, and the immersion time is 60 seconds.

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Abstract

The invention relates to a cleaning agent for removing oxidized spots on a galvanized sheet, a preparation method and application thereof. It contains 20-25 parts by weight of phytic acid, 10-15 parts by weight of acetic acid, 0.5-1 part by weight of octylphenol polyoxyethylene ether, and 60-65 parts by weight of water; it also has 6-8 parts by weight of sodium phytate , 5-6 parts by weight of cerium sulfate. It is economical in composition and has a good cleaning effect. The preparation method is a mixing and stirring method. The process is simple and less equipment is used. The purpose is: use the traditional method of dipping to remove the oxidation spots formed on the surface of the galvanized sheet exposed to the air, and form a passivation film on the surface of the galvanized sheet, especially the part where the steel matrix is ​​exposed after the zinc layer is damaged. The temperature is 20-30°C, and the dipping time is 30-60 seconds. This artifact contributes to improving the quality and market competitiveness of related products.

Description

technical field [0001] The present invention relates to a cleaning agent, more specifically, the present invention relates to a galvanized sheet cleaning agent for removing oxidation spots, and at the same time, the present invention also relates to a preparation method and application of the galvanized sheet cleaning agent for removing oxidation spots . technical background [0002] When the hot-dip galvanized sheet is in humid air, especially when the air contains CO 2 , SO 2 When acidic substances are waiting, the surface of the galvanized layer will quickly form loose white spots, that is, oxidation spots (oxidation spots). The main components of oxidation spots (oxidized white spots) are zinc oxide (ZnO) and zinc hydroxide (Zn(OH) 2 ). This oxidation spot (oxidation white spot) not only affects the appearance of the galvanized sheet, but also brings difficulties to the future use. [0003] At present, factories usually use pickling to remove oxidation spots (oxidiz...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23G1/10C23C22/50C23C22/53
Inventor 吴昊吴骏邹宜哲高况忠
Owner YONGXIN ELECTRONICS CHANGSHU