Welded joint and automobile member
US-2024093708-A1 · Mar 21, 2024 · US
Zinc alloy coated steel sheet having good sealer adhesion and corrosion resistance and process of manufacturing the same
US9382630B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9382630-B2 |
| Application number | US-81085308-A |
| Country | US |
| Kind code | B2 |
| Filing date | Dec 23, 2008 |
| Priority date | Dec 28, 2007 |
| Publication date | Jul 5, 2016 |
| Grant date | Jul 5, 2016 |
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- Title
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Abstract
Official abstract text for this publication.
There is provided a zinc alloy coated steel sheet including a vacuum deposited layer capable of improving corrosion resistance and sealer adhesion that are suitable for the use in automobiles, and a process of manufacturing the same. The zinc alloy coated steel sheet includes a zinc coating layer formed on a steel sheet; and a zinc/metal alloy deposited layer formed on the zinc coating layer, wherein the zinc coating layer, and a metal diffusion layer is present in the zinc coating layer.
First claim
Opening claim text (preview).
The invention claimed is: 1. A process of manufacturing a zinc alloy coated steel sheet having good sealer adhesion and corrosion resistance, the method comprising: depositing a zinc/metal alloy coating layer onto a zinc coated steel sheet of an electro-galvanized steel sheet or a hot-dip galvanized steel sheet to form a layered coating where the zinc/metal alloy coating layer is present at an outermost surface of the coating; and thermally treating the zinc coated steel sheet having the layered coating with the zinc/metal alloy coating layer at the outermost surface at a temperature from 250 degrees Celsius (° C.) or above to less than 300° C. for 3 to 100 seconds, wherein depositing the zinc/metal alloy coating layer is carried out with an alloy material composed of 90-95% by weight of at least one conductive metal selected from the group consisting of Mg, Al, Mn, Cr, Cu, Ti, and Ni, and 5-10% by weight of Zn in a vacuum chamber by using a physical vapor deposition (PVD) method using an electrostatic levitator, and the zinc/metal alloy coating layer has a gradient zinc content decreasing from a surface of the zinc coated steel sheet, wherein, the thermally treated zinc alloy coated steel sheet comprises a zinc coating layer formed on a steel sheet and a zinc/metal alloy layer formed by the diffusion of the metal on the zinc coating layer, and a zinc/iron alloy phase is not present in an interface between the steel sheet and the zinc coating layer. 2. The process of claim 1 , wherein the depositing of the zinc/metal alloy onto the zinc coated steel sheet is performed by levitation of a zinc/conductive metal alloy under a vacuum of 1×10 −2 to 1×10 −5 mbar by using an AC magnetic field. 3. The process of claim 2 , wherein a zinc coating layer has a thickness of 1.4 to 5 micrometers, the zinc/metal alloy deposited layer has a thickness of 0.1 to 1 micrometers, and a zinc/metal alloy layer formed between the zinc coated layer and zinc/metal alloy deposited layer by the thermal treatment extends into the zinc coating layer and the zinc/metal alloy deposited layer. 4. The process of claim 1 , wherein a zinc coating layer has a thickness of 1.4 to 5 micrometers, the zinc/metal alloy deposited layer has a thickness of 0.1 to 1 micrometers, and a zinc/metal alloy layer formed between the zinc coated layer and zinc/metal alloy deposited layer by the thermal treatment extends into the zinc coating layer and the zinc/metal alloy deposited layer. 5. A process of manufacturing a zinc alloy coated steel sheet having good sealer adhesion and corrosion resistance, the method comprising: depositing a zinc/metal alloy onto a zinc coated steel sheet of an electro-galvanized steel sheet or a hot-dip galvanized steel sheet to form a zinc/metal alloy deposited layer; and thermally treating the zinc coated steel sheet with the zinc/metal alloy deposited layer at a temperature from 250 degrees Celsius (° C.) or above to less than 300° C. for 3 to 100 seconds, wherein depositing the zinc/metal alloy coating layer is carried out with an alloy material composed of 90-95% by weight of at least one metal and 5-10% by weight of Zn in a vacuum chamber by using a physical vapor deposition (PVD) method using an electrostatic levitator, and the zinc/metal alloy coating layer has a gradient zinc content decreasing from a surface of the zinc coated steel sheet, wherein the thermally treated zinc alloy coated steel sheet comprises a zinc coating layer formed on a steel sheet and a zinc/metal alloy layer formed by the diffusion of the metal on the zinc coating layer, a zinc/iron alloy phase is not present in an interface between the steel sheet and the zinc coating layer, and the metal is selected from the group consisting of Al, Mn, Cr, Cu, Ti, and Ni.
Assignees
Inventors
Classifications
Controlling the composition · CPC title
Graded interfaces · CPC title
Including graded layers in composition or in physical properties, e.g. density, porosity, grain size · CPC title
Thermal after-treatment, e.g. treatment in oil bath · CPC title
Thermal treatment · CPC title
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Frequently asked questions
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- What does patent US9382630B2 cover?
- There is provided a zinc alloy coated steel sheet including a vacuum deposited layer capable of improving corrosion resistance and sealer adhesion that are suitable for the use in automobiles, and a process of manufacturing the same. The zinc alloy coated steel sheet includes a zinc coating layer formed on a steel sheet; and a zinc/metal alloy deposited layer formed on the zinc coating layer, w…
- Who is the assignee on this patent?
- Kwak Young-Jin, Lee Dong-Yoeul, Nam Kyung-Hoon, and 7 more
- What technology area does this patent fall under?
- Primary CPC classification C23C28/025. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Jul 05 2016 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).