Electroplating solution composition for organic polymer-zinc alloy composite plating and plated metal material using such composition

A technology for electroplating metals and polymers, applied in the direction of electrolytic coatings, coatings, etc., can solve problems such as high cost and inability to obtain corrosion resistance

Inactive Publication Date: 2007-02-14
KANSAI PAINT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] As surface treatment of zinc-based plated metal materials used in automobiles, home appliances, building materials, etc., treatment with chromium salts and treatment with zinc phosphate are generally performed, but toxicity of chromium has been considered to be a problem
Treatment with chromium salts has the following problems: emission of fumes of chromium salts in the treatment step, large cost required for waste water treatment facilities, and elution of chromic acid from chemical conversion coatings
[0006] However, sufficient corrosion resistance cannot be obtained by merely adding water-soluble organic polymers to general plating baths and it is difficult to apply these methods to fields requiring severe corrosion resistance such as the automotive field

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1 to 15 and comparative example 1 to 3

[0081] Each plating solution was obtained according to the blending composition shown in Table 1 below.

[0082] A cold rolled metal material (SPCC) having a plate thickness of 0.8 mm was subjected to alkali degreasing and washing with water, and then plating was performed under the following conditions using each of the above-mentioned plating solutions.

[0083] Plating conditions: Plating is by using 1 to 30A / dm 2 The current density of direct current is carried out at a bath temperature in the range of 30 to 60°C. The thickness of the plating film is 3 μm in all cases. The film thickness is measured by means of a fluorescent X-ray analyzer SEA5200 (manufactured by Seiko Instruments Inc.).

[0084]

Metal ion *1 (g / L)

Organic resin *2 (g / l)

Corrosion inhibitor 3*

(g / l)

Galvanized steel

Board No.

Zn

Fe

CO

Ni

W

R1

R2

R3

R4

R5

F1

F2

F3

Example

1

82...

Embodiment 16 to 30 and comparative example 4 to 6

[0103] Each surface of the electroplated metal material obtained in Table 1 shown above was alkali-degreased, washed with water, drained and dried. Thereafter, "MAGICRON 1000 white" (manufactured by Kansai Paint Co., Ltd., acrylic-melamine resin-based paint, white) was applied thereon so that the dry film thickness became 30 μm, and then baked at 160°C Bake for 20 minutes to obtain each test coated plate.

Embodiment 31 to 45 and comparative example 8 to 10

[0117] Each of the electroplated metal materials obtained in Table 1 shown above was degreased, washed with water, drained and dried. Thereafter, cationic electrodeposition paint "ELECRON GT-10" (manufactured by Kansai Paint Co., Ltd., epoxy polyester resin-based paint) was applied by electrodeposition coating, and then baked at 170°C for 20 minutes , To obtain an electrodeposition-coated plate with a dry film thickness of 20 μm. Use a sprayer to apply the intermediate paint "AMILAC TP-65 gray" (manufactured by Kansai Paint Co., Ltd., amino alkyd resin-based paint) on the electrodeposition coating surface so that the dry film thickness becomes 30 μm, and Bake at 140°C for 20 minutes. Thereafter, the top coat "NEO AMILAC#6000white" (manufactured by Kansai Paint Co., Ltd., amino alkyd resin-based paint) was applied thereon using a sprayer so that the dry film thickness became 30 μm, and then Each test coated plate was obtained by baking at 140°C for 20 minutes.

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Abstract

Disclosed is an electroplating solution composition which enables to obtain a plating with excellent corrosion resistance which exhibits excellent adhesion with a coating film without being subjected to a surface treatment. Such an electroplating solution composition for an organic polymer-zinc alloy composite plating is characterized by containing (A) 1-600 g / l of Zn ions, (B) 1-600 g / l of iron group element ions, (C) 0.1-200 g / l of a tungstic acid compound as W ions and (D) 0.5-500 g / l of a water-soluble or water-dispersible organic polymer compound having a number-average molecular weight of 1,000-1,000,000.

Description

Technical field [0001] The present invention relates to an organic polymer composite zinc alloy electroplating solution composition for forming an electroplated film with two functions of plating and surface treatment, and to an organic polymer composite zinc alloy electroplating metal material obtained by electroplating using the composition . Background technique [0002] As the surface treatment of zinc-based electroplated metal materials used in automobiles, household appliances, building materials, etc., treatment with chromium salt and treatment with zinc phosphate are generally performed, but the toxicity of chromium has been regarded as a problem. The treatment with chromium salt has the following problems: the smoke of chromium salt is emitted during the treatment step, the waste water treatment equipment requires a large cost, and the chromic acid is eluted from the chemical conversion film. In addition, hexavalent chromium compounds are recognized as human carcinogens ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D5/26C25D3/56C25D15/02
Inventor 久保田健太郎春田泰彦平木忠义
Owner KANSAI PAINT CO LTD
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