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Zinc-coated steel for vehicle

A technology for galvanized steel sheets and vehicles, applied in layered products, metal layered products, chemical instruments and methods, etc., can solve the problems of electromagnetic wave leakage or intrusion, and achieve the effect of excellent conductivity

Inactive Publication Date: 2016-04-27
邵杰
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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

[0020] 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),

[0021] (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;

[0022] (II) The mass ratio (B / C) of tetraalkoxysilane (B) to the compound (C) having an epoxy group is 0.1 to 1.6;

[0023] (III) The mass ratio (B / D) of tetraalkoxysilane (B) to chelating agent (D) is 0.3~2.0;

[0024] (IV) The mass ratio ...

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PUM

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Abstract

The invention discloses a zinc-coated steel plate for vehicle, which belongs to the field of zinc-coated steel plates. The zinc-coated steel plate is obtained by coating surface treating agent on the surface of the zinc-coated steel plate, heating up and drying, and is provided with a surface treating coated film with adhesion amount of 50mg / m<2>-500mg / m<2> at each surface, wherein the surface treating agent comprises the following components: a water-soluble zirconium compound (A), tetraalkoxy silane (B), a compound (C) with an epoxy group, a chelating agent (D), a vanadic acid compound (E) and a metal compound (F) containing one or more metals in a group including Ti, Al and Zn; and a pH value of the surface treating agent is 8-10. The zinc-coated steel plate is adjusted to satisfy certain conditions, so that the zinc-coated steel plate, which has various performances including corrosion resistance and adaptation, and has excellent conductivity under severe condition that the steel plate contacts with a lining pad and the like at low-contact pressure while the corrosion resistance is not lowed, and the like, can be provided.

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): B32B15/04B32B15/082B32B15/18
Inventor 邵杰
Owner 邵杰