Preparation method of surface composite coating of Tb-Dy-Fe magnetostrictive material

A technology of giant magnetostriction and surface compounding, which is applied in the direction of metal material coating process, superimposed layer plating, coating, etc., can solve the problems of unknown corrosion resistance of metals, and achieve a good combination effect

Inactive Publication Date: 2010-06-23
725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, the above-mentioned technologies do not use electroless plating, electroplating, etc. for surface anti-corrosion treatment, and have not been tested to simulate the marine environment, and the corrosion resistance effect of metals in the marine environment is unknown.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] According to the method described in Chinese invention patent embodiment 1 that the patent application number is 03154426.6, Tb is prepared 0.3 Dy 0.7 Fe 1.95 Giant magnetostrictive material, first the Tb of φ7×5mm 0.3 Dy 0.7 Fe 1.95 The short rod is sealed in zinc stearate at 160°C for 20 minutes; use a soft cloth to remove excess zinc stearate on the surface of the material after sealing, and then polish Tb with 600 sandpaper 0.3 Dy 0.7 Fe 1.95 Clean the surface of the material until a bright metal matrix appears, and wipe the surface with acetone-containing absorbent cotton; then soak it in 30°C, 50g / L Q121 medium-temperature weak alkali degreaser solution produced by Kaifeng Andy Electroplating Chemical Co., Ltd. 15 minutes, and washed with water; then pickled for 30 seconds in a pickling solution with a formula of nitric acid 20ml / L and thiourea 1.0g / L at a temperature of 25°C, and washed with water; then at a temperature of 20°C, a formula of sulfo Activate...

Embodiment 2

[0040] φ15×8mm(Tb,Dy)Fe to be purchased from Uken Rare Earth New Materials Co., Ltd. 2 The short rod is sealed in zinc stearate at 140°C for 30 minutes; use a soft cloth to remove excess zinc stearate on the surface of the material after sealing, and then polish Tb with No. 600 sandpaper 0.3 Dy 0.7 Fe 1.95 Clean the surface of the material until a bright metal matrix appears, and wipe the surface with acetone-containing absorbent cotton; then soak it in a solution of 30g / L Q121 medium-temperature weak base degreasing agent (produced by Kaifeng Andy Electroplating Chemical Co., Ltd.) at 20°C Degreasing for 20 minutes and washing with water; then pickling for 50 seconds at a temperature of 10°C with a formula of nitric acid 10ml / L and thiourea 0.5g / L, and washing with water; then at a temperature of 10°C, the formula is Activate in an activation solution of sulfosalicylic acid 10g / L and ammonium bifluoride 5g / L for 40 seconds, and wash with water.

[0041] The formula of elec...

Embodiment 3

[0048] According to the method described in Chinese invention patent embodiment 1 that the patent application number is 03154426.6, Tb is prepared 0.3 Dy 0.7 Fe 1.95 Giant magnetostrictive material, first the Tb of φ7×5mm 0.3 Dy 0.7 Fe 1.95 The short rod is sealed in zinc stearate at 170°C for 10 minutes; use a soft cloth to remove excess zinc stearate on the surface of the material after sealing, and then polish Tb with 600-grade sandpaper 0.3 Dy 0.7 Fe 1.95 The surface of the material until a bright metal matrix appears, and wipe the surface with acetone-containing absorbent cotton; then soak it in a solution of 60°C, 60g / L Q121 medium-temperature weak base degreasing agent (produced by Kaifeng Andy Electroplating Chemical Co., Ltd.) Degreasing for 5 minutes and washing with water; then pickling for 10 seconds in a pickling solution with a formula of nitric acid 50ml / L and thiourea 1.5g / L at a temperature of 30°C, and washing with water; then at a temperature of 30°C, ...

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Abstract

The invention relates to a surface corrosion resistant technology of a metal material, in particular to a preparation method of a surface composite coating of a Tb-Dy-Fe magnetostrictive material. The preparation method comprises the following steps: firstly, carrying out preplating treatment; secondly, chemically plating nickel and phosphorus and electroplating a corrosion-resistant zinc-nickel alloy; and finally carrying out postplating treatment. A nickel layer and a matrix are well bonded; the composite coating is subjected to 10 times of thermal cycle tests; the coating is not separated from matrix metal and bubbling, strip stripping and layered stripping do not generate; and the coating has excellent performance in a neutral salt spray corrosion resistance test.

Description

technical field [0001] The invention relates to a metal material surface anticorrosion technology, in particular to a method for preparing a composite coating on the surface of a terbium-dysprosium-iron giant magnetostrictive material. Background technique [0002] Terbium dysprosium iron giant magnetostrictive material is a new type of intelligent functional material, its basic composition is (Tb, Dy)Fe 1.7～2.0 , the typical composition is Tb 0.3 Dy 0.7 Fe 1.95 , (Tb,Dy)Fe 1.7～2.0 , Youyan Rare Earth New Materials Co., Ltd. and Gansu Tianxing Rare Earth Functional Materials Co., Ltd. are both sold. Its production method is described in Acta Metall Sinica, Vol. 40, Issue 4, April 2004, pp. 378-382 "Heat Treatment Microstructure and Properties of Directional Solidified Tb-Dy-Fe Alloy", Chinese Journal of Rare Earths, Vol. 24, No. 3 Issue, June 2006, pages 323-327 "Research on Preparation of Rare Earth Giant Magnetostrictive Materials by Powder Metallurgy", Chinese Invent...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C28/02C23C18/32C23C18/36C23C18/18C25D3/56
Inventor 石绪忠王哲林福文
Owner 725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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