Unlock instant, AI-driven research and patent intelligence for your innovation.

Al-Zn-BASED HOT-DIP PLATED STEEL SHEET

A hot-dip plating, al-zn technology, applied in the direction of hot-dip plating process, coating, chemical instruments and methods, etc., can solve the problems of easily causing surface defects, insufficient corrosion resistance, etc., and achieve excellent corrosion resistance Excellent corrosion resistance and corrosion resistance, light weight corrosion resistance effect

Active Publication Date: 2019-04-26
JFE STEEL CORP
View PDF8 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] However, even when the hot-dipped Al-Zn-plated steel sheets disclosed in Patent Documents 1 and 2 are coated, the corrosion resistance (corrosion resistance after coating) when damage occurs in the coating film is still not good. full
In addition, in the production of hot-dip Al-Zn-coated steel sheets using Mg, easily oxidizable Mg is oxidized, so much dross is generated compared with the production of hot-dip Al-Zn-coated steel sheets that do not contain Mg. It is easy to cause surface defects, so a method to improve corrosion resistance without containing Mg is expected

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Al-Zn-BASED HOT-DIP PLATED STEEL SHEET
  • Al-Zn-BASED HOT-DIP PLATED STEEL SHEET
  • Al-Zn-BASED HOT-DIP PLATED STEEL SHEET

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0027] Hereinafter, the present invention will be specifically described. In addition, in the following description, the unit representing the content of each element in the composition of the plating layer and the plating bath is all "mass %", and unless otherwise specified, only "%" is used below.

[0028] First, the most important method of improving the corrosion resistance of the hot-dip Al-Zn-based steel sheet after coating in the present invention will be described. The hot-dipped Al-Zn-based steel sheet of the present invention contains 0.1 to 3% Ce in addition to Al in the coating layer. By including Ce in the plating layer, it is possible to improve the corrosion resistance after coating, which is the subject of the present invention.

[0029] In the conventional hot-dip Al-Zn coated steel sheet that does not contain Ce in the coating, when the coating is in contact with the atmosphere, dense and stable Al is immediately formed around the α-Al phase 2 O 3 Under the prote...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
thicknessaaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

Abstract

The present invention provides an Al-Zn-based hot-dip plated steel sheet having excellent corrosion resistance after coating. This Al-Zn-based hot-dip plated steel sheet is characterized by having a plating layer containing, by mass%, 25-80% of Al and 0.1-3% of Ce, the balance being Zn and unavoidable impurities.

Description

Technical field [0001] The invention relates to a hot-dip Al-Zn-plated steel sheet with excellent corrosion resistance after coating. Background technique [0002] The hot-dipped Al-Zn-based steel sheet, for example, the hot-dip-coated Al-Zn-based steel sheet containing 25 to 90% by mass of Al in the zinc-based coating exhibits superior corrosion resistance than the hot-dip galvanized steel sheet. [0003] Generally speaking, this hot-dip Al-Zn-based steel sheet uses a thin steel sheet obtained by hot-rolling or cold-rolling a slab as a base steel sheet, and the base steel sheet is recrystallized in an annealing furnace of a continuous hot-dip coating line Manufactured by annealing and hot-dip plating. The formed Al-Zn-based plating layer includes an alloy phase existing at the interface with the base steel sheet and an upper layer existing thereon. [0004] It should be noted that the upper layer is mainly composed of a dendritic solidified portion (α-Al phase) in which Al dendrit...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C23C2/12C22C18/04C22C21/10C23C2/06C23C2/40
CPCC23C2/06C23C2/12C23C2/40C22C18/04C22C21/10B32B15/012B32B15/013
Inventor 吉田昌浩松崎晃
Owner JFE STEEL CORP