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Surface coating liquid of hot galvanized plate and preparation method of high-humidity resistant hot galvanized passivation plate

A technology of hot-dip galvanized sheet and surface coating, applied in the direction of metal material coating process, etc., can solve the problems of outstanding environmental protection and difficulty in application of hot-dip galvanized steel sheet, and achieve the effect of excellent corrosion resistance and good environmental protection.

Inactive Publication Date: 2019-07-19
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem solved by the invention is that the existing hot-dip galvanized steel sheet has outstanding environmental protection problems, and it is difficult to apply to the alternating hot and humid weather of high humidity and high temperature in South China.

Method used

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  • Surface coating liquid of hot galvanized plate and preparation method of high-humidity resistant hot galvanized passivation plate

Examples

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Comparison scheme
Effect test

Embodiment 1

[0041] The preparation of the surface coating solution of the hot-dip galvanized sheet in this embodiment: the water 100, the fluorine-containing auxiliary agent 5, the corrosion inhibitor 6, the silicon-containing substance 18, and the water-based organic substance 30 are mixed uniformly under normal temperature stirring conditions in parts by weight, Among them, the fluorine-containing auxiliary agent is aqueous fluorocarbon emulsion and fluorotitanic acid (the weight ratio of the two is 4:1), and the corrosion inhibitor is sodium hexametaphosphate and potassium molybdate (the weight ratio of the two is 2:1), containing The silicon material is colloidal silica, and the water-based organic matter is water-based acrylic emulsion;

[0042] Preparation of hot-dip galvanized passivation sheet resistant to high humidity environment: roll coating the above coating solution on a hot-dip galvanized steel strip, and cure it for 15s at a curing temperature of 105° C. Hot-dip galvanized...

Embodiment 2

[0044] The preparation of the surface coating liquid of the hot-dip galvanized sheet of this embodiment: the content of each component is as shown in Table 1, and the others are the same as in Example 1;

[0045] Preparation of hot-dip galvanized passivation plate resistant to high humidity environment: the same as in Example 1.

Embodiment 3

[0047] The preparation of the surface coating liquid of the hot-dip galvanized sheet of this embodiment: the content of each component is as shown in Table 1, and the others are the same as in Example 1;

[0048] Preparation of hot-dip galvanized passivation plate resistant to high humidity environment: the same as in Example 1.

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Abstract

The invention relates to surface coating liquid of a hot galvanized plate and a preparation method of a high-humidity resistant hot galvanized passivation plate, and belongs to the field of hot galvanized plate. The technical problem solved by the invention is that the existing hot galvanized steel plate has outstanding environmental protection problem and is not suitable for the alternating wet and hot weather of high humidity and high temperature in South China. The surface coating liquid of the hot galvanized plate provided by the invention comprises the following in parts by weight: 100 parts of water, 2-10 parts of fluorine-containing auxiliary agent, 1-10 parts of corrosion inhibitor, 10-20 parts silicon-containing substance and 15-45 parts of water-based organic matter; in the invention, the surface coating liquid of the hot galvanized plate is coated on the surface of the hot galvanized plate, and then the high humidity resistant hot galvanized passivation plate is obtained bydrying and and solidifying. With excellent corrosion resistance, heat resistance, water resistance, high humidity resistance, fingerprint resistance and self-lubricating property, the hot galvanized plate coating prepared by the invention is suitable for alternating wet and hot weather with high humidity and high temperature in South China.

Description

technical field [0001] The invention belongs to the field of hot-dip galvanized steel sheets, in particular to a method for preparing a surface coating liquid of a hot-dip galvanized sheet and a high-humidity-resistant hot-dip galvanized passivation sheet. Background technique [0002] Hot-dip galvanized sheet has been widely used in industrial fields such as household appliances, automobiles, and construction due to its excellent processing and performance capabilities. In a humid environment, hot-dip galvanized sheets are prone to corrosion, so coated steel sheets are generally passivated. The traditional passivation treatment, such as chromate treatment, has the advantages of simple process, good film adhesion, high corrosion resistance and self-healing ability. However, hexavalent chromium is a carcinogen, which has serious harm to the human body and the environment. With the implementation of the ROHS directive, products containing hexavalent chromium have been strictl...

Claims

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Application Information

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IPC IPC(8): C23C22/44C23C22/36
CPCC23C22/36C23C22/44C23C2222/20
Inventor 董学强郭太雄周一林寸海红
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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