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Finishing agent and member having overcoat formed from the finishing agent

A technology of surface agent and outer coating, which is applied in the direction of coating, superimposed layer plating, metal material coating process, etc., to achieve the effects of improving corrosion resistance, increasing gloss, and reducing environmental load

Inactive Publication Date: 2011-05-04
YUKEN KOGYO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the traditional chromate protective film obtained from a chemical treatment solution containing hexavalent chromium ions has become the subject of restrictions in the above directives because the protective film contains soluble hexavalent chromium.

Method used

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  • Finishing agent and member having overcoat formed from the finishing agent
  • Finishing agent and member having overcoat formed from the finishing agent
  • Finishing agent and member having overcoat formed from the finishing agent

Examples

Experimental program
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Effect test

preparation example Construction

[0141] 3. Preparation method of surface agent and method of manufacturing outer coating

[0142] (1) Preparation method of surface agent

[0143] The preparation method of the surface agent of the present invention is to directly add the above-mentioned components while stirring the liquid solvent, or add an appropriate amount of the concentrated solution described later, preferably to dissolve and mix, and there is no special limitation on the order of mixing the components.

[0144] (2) Manufacturing method of outer coating

[0145] The outer coating of the present invention is manufactured by the following method, making the surface agent of the present invention and the anti-oxidation layer arranged on the substrate, specifically, carrying out contact as a chemical protective film for a certain period of time, after that, by contacting with the surface agent, The topcoat layer of the present invention is produced by drying the anti-oxidation layer to which the surface age...

Embodiment 1

[0159] (1) Preparation of test piece

[0160] Clean the SPCC steel plate (100mm × 50mm × 0.8mm, surface area 1dm2) with known method 2 ), forming a galvanized layer or a galvanized-iron alloy layer. Regarding the respective plating layers, the following conditions apply.

[0161] Galvanizing: Galvanizing solution (METASU-ZST process of Yuken Industry Co., Ltd.)

[0162] Coating thickness 8μm

[0163] Galvanizing—iron alloy: Galvanizing solution (METASU-AZ process of Yuken Kogyo Co., Ltd.)

[0164] Iron eutectoid rate 0.4% by mass

[0165] Coating thickness 8μm

[0166] (2) chemical treatment

[0167] The steel plate that forms coating is immersed in the 67.5% nitric acid of 3ml / L under normal temperature (25 ℃) 10 seconds, carries out the activation of surface, under normal temperature (25 ℃) the steel plate after rinsing activation 10 seconds. Next, perform any one of the chemical treatments shown in Table 1 to form a chemical protection film, and wash the steel plate ...

Embodiment 2

[0200] For the same test piece prepared in Example 1, the same pretreatment (activation, water washing) as in Example 1 was carried out, followed by the chemical treatment of No.C in Table 1, and the steel plate on which the chemical protective film was formed Wash with water for 10 seconds at room temperature.

[0201] Next, the surface treatment shown in Table 5 was performed on the water-washed undried steel plate after the above-mentioned chemical treatment, and the treated steel plate was treated at 80° C. for 10 minutes to prepare a test piece having an outer coating layer. In addition, a part of the steel plate was not subjected to this surface treatment, and was allowed to dry naturally to be a test piece.

[0202] [table 5]

[0203] Surface treatment No.

n

o

p

q

r

s

t

u

Al (g / L)

2

2

2

10

2

2

5

2

Zn (g / L)

12

12

12

5

5

5

20

5

...

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Abstract

Disclosed is a chromium-free finishing agent which is used for forming an overcoat on an antioxidant layer which is provided on a base material. The finishing agent contains an aluminum-containing substance which is in at least one form selected from cations, a salt thereof and a coordination compound thereof; a zinc-containing substance which is in at least one form selected from cations, a salt thereof and a coordination compound thereof; a chelating agent which is capable of forming a coordination compound together with aluminum ions; and a coating film-forming substance which is a chemical substance containing a first element selected from the group consisting of P, Mo, W, Ce, Mn, Si, Ti, Zr and V. The finishing agent preferably contains citric acid as the chelating agent, and may additionally contain an organic binder.

Description

technical field [0001] The present invention relates to a surface agent and a component having an outer coating formed from the surface agent. More specifically, the present invention relates to a surface agent that does not use chromium ions for forming an outer coating on an anti-oxidation layer, such as a hexavalent chromium-free chemical protective film, which is formed with the outer coating part. Background technique [0002] In recent years, the use of hazardous substances has been increasingly restricted in accordance with environmental directives such as RoHS (Restriction of the Use of Certain Hazardous Substances in Electrical and Electronic Equipment) and ELV (End of Life Vehicles) (lead, mercury, cadmium, hexavalent chromium, etc.). [0003] On the one hand, since the metal surface of parts having a metal surface such as galvanized parts is easily oxidized, an anti-oxidation layer is often formed on the surface. As one of the anti-oxidation layers, a chemical ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C22/12C23C22/20C23C22/40C23C22/42C23C22/48C23C28/04
CPCC09D5/084C23C22/46C23C22/83C23C2222/10C23C28/021C23C28/025
Inventor 齐藤智子永谷康宏石川智子杉浦寿裕
Owner YUKEN KOGYO
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