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Non-chromium resin coating metal plate with excellent end face corrosion resistance

A metal plate and resin technology, applied in metal material coating process, device for coating liquid on the surface, coating, etc., to achieve good corrosion resistance and processability, good balance, and the effect of inhibiting red rust

Inactive Publication Date: 2011-11-23
KOBE STEEL LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above-mentioned prior art cannot be said to be a technology for improving the corrosion resistance of the end face under the assumed cruel environment.

Method used

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  • Non-chromium resin coating metal plate with excellent end face corrosion resistance
  • Non-chromium resin coating metal plate with excellent end face corrosion resistance
  • Non-chromium resin coating metal plate with excellent end face corrosion resistance

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0039] The present invention will be further described in detail by the following examples. However, the following examples do not limit the present invention, and modifications within the scope not departing from the gist of the present invention are included in the present invention. In addition, unless otherwise specified below, "%" means "mass %", and "part" means "mass part", and the evaluation method applied to an Example is as follows.

[0040] [Cross-cut corrosion resistance]

[0041] On the test material (50mm×120mm), cut a cross-section (60°, 60mm) with a cutter, perform a salt spray test according to JIS Z2371, and measure the expansion range of the cross-cut portion of the coating film after 500 hours. The evaluation criteria are as follows.

[0042] ◎: Expansion less than 1mm

[0043] ○: The expansion range is more than 1mm and less than 3mm

[0044] △: The expansion range is more than 3mm and less than 5mm

[0045] ×: The expansion range is more than 5mm

[...

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Abstract

The present invention provides a resin coated metal plate on which a coating film is formed on a non-chromium substrate processing involucra, wherein the resin coating film comprises 5-40 weight parts of slow-released rust-preventive particles which are obtained through combining porous inorganic particles and metal compound rust-preventive painting relatively to 100 weight parts of coating film component except for the slow-released rust-preventive particles. After the resin coated metal plate is curved with 100 scratches with size of 1mm*1mm, the dissolving-out velocity of metallic ion fromthe rust-preventive painting is 0.001-1.0mg / l*m2*hr when the resin coated metal plate is immersed into carbonate pH standard solution with a temperature of 40 DEG C. The generating time of red rust can be delayed even at the end plane and flaw part which are continuously exposed to a wet environment of water through the structure.

Description

technical field [0001] The present invention relates to a resin-coated metal sheet that is excellent in corrosion resistance, especially corrosion resistance of end surfaces, even without chromate treatment. Background technique [0002] The cut surface (end surface) and flawed part of the resin-coated metal plate expose the metal base part of the metal plate. This is the part where it is difficult to exert the anti-rust effect due to galvanization and resin film. However, when the anti-rust pigment is added to the resin film At the same time, Zn ions leached from the galvanized surface and the metal in the anti-rust pigment form a passivation film to inhibit the corrosion of zinc and ensure a certain degree of corrosion resistance. [0003] For example, JP-A-6-9902 discloses that by adding chromate antirust pigments and adding vanadium / phosphate antirust pigments to the resin film, the corrosion resistance of the end faces can be improved. sex technology. This patent docu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23F11/00B32B15/08B32B27/20
CPCB05D2202/10C09D5/082C09D5/084C09D7/40C23C28/00
Inventor 岩辰彦中元忠繁今堀雅司
Owner KOBE STEEL LTD