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Zinc-plating steel plate for vehicles

A technology for galvanized steel sheets and vehicles, applied in hot-dip galvanizing process, coating, metal material coating process, etc., can solve the problems of electromagnetic wave leakage or intrusion, and achieve the effect of excellent conductivity

Inactive Publication Date: 2016-04-06
QINGDAO BAIJIANCHENG ENVIRONMENTAL PROTECTION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, since the shielding box is manufactured by forming a metal plate, the shielding box has a discontinuity (seam or joint) where leakage or intrusion of electromagnetic waves is likely to occur

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] It is obtained by coating a surface treatment agent on the surface of a galvanized steel sheet for vehicles, followed by heating and drying, and has a surface treatment film with an adhesion amount of 50-500 mg / m2 on each surface, wherein the surface treatment agent contains: Water-soluble aluminum compound (A), tetraalkoxysilane (B), compound (C) with epoxy group, chelating agent (D), vanadic acid compound (E) and a compound containing Ti, Al and Zn The metal compound (F) of at least one or more metals has a pH of 8 to 10 and is adjusted to satisfy the following conditions (I) to (V),

[0022] (1) The mass ratio (A / B) of the Zr equivalent mass of the water-soluble aluminum compound (A) to the tetraalkoxysilane (B) is 1.0 to 6.0;

[0023] (II) The mass ratio (B / C) of tetraalkoxysilane (B) to the compound (C) having an epoxy group is 0.1 to 1.6;

[0024] (III) The mass ratio (B / D) of tetraalkoxysilane (B) to chelating agent (D) is 0.3~2.0;

[0025] (IV) The mass ratio ...

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Abstract

The invention relates to a zinc-plating steel plate for vehicles, and belongs to the field of zinc-plating steel plates. According to the present invention, a surface treatment agent is coated on the surface of a zinc-plating steel plate for vehicles, and heating drying is performed to obtain the product, wherein the product is provided with a surface treatment coating film with the adhesion amount of 50-500 mg / m on each surface, the surface treatment agent comprises a water-soluble aluminum compound (A), tetraalkoxysilane (B), a compound having an epoxy group (C), a chelating agent (D), a vanadic acid compound (E) and a metal compound (F) containing at least more than or equal to one selected from a group comprising Ti, Al and Zn, and the pH value is 8-10, and can adjusted to meet a certain condition, such that the zinc-plating steel plate with characteristics of corrosion resistance, sealing property and other performances can be provided, and particularly under the condition of no reduction of corrosion resistance, the conductibility of the zinc-plating steel plate is excellent when the steel plate contacts the lining pad and the like under the low contact force harsh condition.

Description

technical field [0001] The invention provides a galvanized steel sheet for vehicles, which belongs to the field of galvanized steel sheets. Background technique [0002] Due to its good corrosion resistance, excellent coating performance and clean appearance, hot-dip galvanized steel sheets have been widely used in manufacturing industries such as household appliances and automobile body panels. The requirements for the hot-dip stop steel plate coating are strong adhesion between the coating and the substrate, and it will not fall off when it is stamped and deformed. In addition, it must have good welding performance, corrosion resistance and phosphating performance to ensure the adhesion of the paint film and after painting. corrosion resistance. However, there are problems such as powdering and peeling of the coating during the stamping process of the hot-dip galvanized steel sheet, which causes damage to the coating and further affects the corrosion resistance and remova...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C2/06C23C2/26C23C2/40
Inventor 张栋
Owner QINGDAO BAIJIANCHENG ENVIRONMENTAL PROTECTION TECH CO LTD
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