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Surface treatment steel plate

A technology for surface treatment of steel plates and steel plates. It is used in the plating of superimposed layers, synthetic resin layered products, coatings, etc. It can solve the problems of coating oxidation, white rust, deterioration, etc., and achieve excellent corrosion resistance and design. , the effect of suppressing changes

Active Publication Date: 2022-06-14
NIPPON STEEL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the surface of various plated steel sheets such as galvanized steel sheets may be degraded by the surrounding environment
For example, there are problems such as oxidation of the coating and formation of white rust due to electrolytes such as salt contained in the atmosphere, oxygen and moisture present in high-temperature and high-humidity environments

Method used

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  • Surface treatment steel plate

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0101]

[0102] The coating material can be obtained, for example, by mixing a binder resin and a curing agent dispersed in a solvent, and then dispersing a predetermined amount of a rust inhibitor source and an arbitrarily selected bright pigment in the mixture. The order of mixing can also vary. It does not specifically limit as a binder resin, A polyester resin, a urethane resin, an acrylic resin, etc. can be used, As a hardening|curing agent, a melamine resin etc. can be used. Moreover, as a solvent, an acidic solvent can be used, and as a rust inhibitor source, the thing which melt|dissolved in this acidic solvent, for example, P compound, V compound, Mg compound, or these 2 or more types can be used. On the other hand, as a bright pigment, it can select suitably from the pigment which does not dissolve in an acidic solvent. The ratio of the binder resin to the curing agent can be appropriately determined, and for example, it can be in the range of 1:1 to 9:1.

[0103...

Embodiment

[0116] In this example, the average concentration and concentration distribution of the rust inhibitor in the coating film, the average concentration of the bright pigment, the types of the anti-rust agent and the bright pigment, the type of the binder resin, and the chemical composition of the Zn-based alloy coating were compared. The surface-treated steel sheets produced with various modifications were evaluated for their corrosion resistance, brightness, process adhesion, and storage stability. It should be noted that the surface-treated steel sheet according to the present invention will be described in more detail below with reference to some examples. However, the intention is not to limit the scope of the invention described in the claims by the specific examples described below.

[0117]

[0118] (Formation of Zn-based alloy plating layer)

[0119] A cold-rolled steel sheet with a thickness of 1 mm is immersed in a hot-dip coating bath of about 450° C. with chemical...

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Abstract

The present invention relates to a surface-treated steel sheet, which is characterized in that it has a steel sheet, a Zn-based alloy coating formed on at least one side of the steel sheet, and a coating film containing an antirust agent and a binder resin formed on the Zn-based alloy coating, The concentration of the antirust agent in the coating film at a position 10 nm away from the interface between the Zn-based alloy plating layer and the coating film is 1.5 to 5.0 times the average concentration of the antirust agent in the coating film.

Description

technical field [0001] The present invention relates to a surface-treated steel sheet excellent in corrosion resistance. Background technique [0002] Various types of plated steel sheets excellent in corrosion resistance used for home appliances, building materials, automobiles, and the like are known. For example, a galvanized steel sheet in which a zinc coating layer is formed on a steel sheet by hot-dip galvanizing or the like is known. If the zinc plating layer is provided on the steel sheet in this way, even if the galvanized steel sheet is damaged and the steel sheet is exposed, zinc, which is easier to corrode than the iron constituting the steel sheet, corrodes first to form a protective film, and the protective film can prevent the Corrosion of steel plates. Therefore, galvanized steel sheets are being developed in various applications requiring corrosion resistance. [0003] However, the surface of various plated steel sheets such as galvanized steel sheets may...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B15/08B32B27/18B32B27/20C23C2/06C23C2/12C23C22/06C23C26/00C23C28/00
CPCB32B15/08B32B27/18B32B27/20C23C2/06C23C2/12C23C22/06C23C26/00C23C28/00C23C28/3225C23C28/321C23C28/34C23C22/08C23C22/40C23C22/74C23C2/26C23C2/40C22C18/04
Inventor 柴尾史生平井亚希子东新邦彦河村保明植田浩平
Owner NIPPON STEEL CORP