Iron group metal material after black surface treatment and manufacturing method thereof

A metal material and surface treatment technology, applied in the direction of metal material coating process, etc., can solve the problems of chrome-free, high cost and economical, and the corrosion resistance of the product cannot be said to have sufficient performance, so as to achieve excellent sliding performance and corrosion resistance The effect of excellent and simple process

Active Publication Date: 2011-04-13
NIHON PARKERIZING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] However, the method of Patent Document 1 uses hexavalent chromium, which causes inflammation in digestive organs and lungs, and is carcinogenic, teratogenic, toxic, etc., which poses problems in terms of work safety and the environment.
In addition, the chrome-plated product obtained by the method of Patent Document 1 cannot be said to have satisfactory performance in terms of sliding performance.
[0009] Although the method of Patent Document 2 does not use hexavalent chromium, since trivalent chromium is contained in the formed film, it cannot be said to be completely chromium-free, and there are still problems in terms of work safety and the environment.
In addition, the chrome-plated product obtained by the method of Patent Document 2 cannot be said to have satisfactory performance in terms of sliding performance.
[0010] The method of Patent Document 3 requires a large-scale facility for performing electrolysis after zinc-nickel plating, so there is an economical problem due to high cost
[0011] The method of Patent Document 4 is the same as Patent Document 3, requiring large-scale equipment for performing electrolysis, and the obtained product cannot be said to have sufficient performance in terms of corrosion resistance
[0012] In addition, the レイデント (registered trademark) treatment cannot be said to be completely chromium-free because chromium is contained in the formed film, and there are still problems in terms of work safety and the environment.
In addition, since Reident (registered trademark) treatment is usually electrolyzed at an extremely low temperature below 10°C, there are also economic problems due to electricity costs, waste liquid treatment costs, etc.

Method used

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  • Iron group metal material after black surface treatment and manufacturing method thereof
  • Iron group metal material after black surface treatment and manufacturing method thereof
  • Iron group metal material after black surface treatment and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～10 and 17～20

[0093] Embodiments 1-10 and 17-20, comparative examples 6-7 are implemented according to the following procedures.

[0094] Alkaline degreasing → washing with water → forming the first layer → washing with water → forming the second layer → washing with water → drying → forming the third layer → baking

Embodiment 11～16

[0095] Embodiments 11-16 are implemented according to the following procedures.

[0096] Alkaline degreasing→Washing→Forming the first layer→Washing→Forming the second layer→Washing→Drying→Forming the middle coating layer→Drying, baking→Forming the third layer→Baking

[0097] Reference examples 1-4 are implemented according to the following procedures.

[0098] Alkaline degreasing→Water washing→Forming the first layer→Washing→Drying→Forming the middle coating layer→Drying, baking→Forming the third layer→Baking

Embodiment 1

[0136] Dilute "Palbratsu A" manufactured by Nippon Parker Seisei Co., Ltd. with tap water to a concentration of 80.5% by mass, use the diluted solution as a blackening agent, heat to 148°C, and degrease the iron-based metal with alkali The material is immersed for 60 minutes, and the first layer mainly composed of ferric iron tetroxide is formed on the surface of the iron-based metal material after the alkali degreasing treatment.

[0137] Use titanium hydrofluoride reagent, nitric acid reagent and hydrofluoric acid reagent to prepare an acidic chemical conversion treatment solution with a titanium concentration of 2000 mg / L, a nitric acid concentration of 10000 mg / L, and a fluorine concentration of 7 mg / L as free fluorine. Then, the chemical conversion treatment liquid is heated to 50° C., and the pH is adjusted to 3.0 with an ammonia water reagent. In the adjusted chemical conversion treatment liquid, the iron-based metal material formed on the first layer is immersed for 300...

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Abstract

The present invention provides an iron group metal material after black surface treatment, which forms a black film that has excellent corrosion resistance and sliding performance and does not contain chromium. The surface of the iron group metal material is provided with the following components: a ferroferric oxide layer which is formed through chemical conversion treatment; a chemical conversion treatment layer which is formed on the ferroferric oxide layer and comprises at least one component selected from the following matters: phosphate of at least one element selected from zinc, tin, iron, manganese and calcium; oxide of at least one element selected from titanium, zirconium, hafnium, indium, tin, bismuth, vanadium, nickel, cerium, molybdenum and wolfram; fluoride of at least one element selected from titanium, zirconium, hafnium, indium, tin, bismuth, vanadium, nickel, cerium, molybdenum and wolfram; and a solid lubrication layer which is formed on the chemical conversion treatment layer.

Description

technical field [0001] The present invention relates to an iron-based metal material with a black surface treatment and a manufacturing method thereof. Chromium-containing black film (film). Background technique [0002] In optical mechanical parts, measuring equipment parts, firearms, telecommunications equipment parts, motorcycle mechanical parts, automotive mechanical parts, decorations, etc., as well as mechanical devices represented by semiconductor manufacturing equipment and food manufacturing equipment For direct linkages and the like, iron-based metal materials are used. For the purpose of improving corrosion resistance and sliding performance, various surface treatments are performed on these iron-based metal materials. For applications that also require reduction of light reflectance and design performance, it is necessary to make the surface of the iron-based metal material black . [0003] As a technique for making the surface of such an iron-based metal mate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C22/00
Inventor 丰岛干人中田和也
Owner NIHON PARKERIZING
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