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Nickel-cobalt/chromium-aluminum/yttrium oxide plating and composite electroplating method thereof

A composite electroplating and coating technology, used in coatings, electrolytic coatings, etc., can solve problems such as toughness, poor resistance to high temperature oxidation and hot corrosion, resistance to high temperature hot corrosion and mechanical properties, and deterioration of coating properties. High temperature oxidation and hot corrosion performance, eliminate hydrogen embrittlement, improve the effect of coating purity

Active Publication Date: 2017-06-09
GUANGZHOU SPECIAL PRESSURE EQUIP INSPECTION & RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the structure of high-temperature coatings such as the obtained Ni-Cr, Ni-Al, MCrA1Y is not compact enough, and the porosity is higher, so the toughness, high-temperature oxidation resistance and hot corrosion resistance are not good, and the obtained MCrA1Y coatings have been exposed to high-temperature environments for a long time , there is interdiffusion of elements between the coating and the substrate, resulting in deterioration of coating performance, high temperature thermal corrosion resistance and mechanical performance decline

Method used

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  • Nickel-cobalt/chromium-aluminum/yttrium oxide plating and composite electroplating method thereof
  • Nickel-cobalt/chromium-aluminum/yttrium oxide plating and composite electroplating method thereof
  • Nickel-cobalt/chromium-aluminum/yttrium oxide plating and composite electroplating method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A kind of (Ni-Co) / CrAl / Y of this embodiment 2 o 3 For the composite electroplating method of the coating, the substrate used is Q235 steel, and the steps are as follows:

[0035] (1) Pretreatment of the substrate:

[0036] a. Degreasing treatment of the substrate: the degreasing liquid used includes Na 3 PO 4 20g / L, OP emulsifier 2g / L, Na 2 CO 3 20g / L, NaOH65g / L aqueous solution; the treatment temperature is 80-90°C, and the time is 3-8min;

[0037] b. Derusting treatment of the substrate: the derusting solution used is 38% HCl0.2~0.5L / L, H 2 SO 4 0.5-1.5L / L, OP-10 emulsifier 0-0.6wt%, urotropine 0.6-1.2wt% aqueous solution; the treatment temperature is normal temperature, and the time is 1-5min;

[0038] c. Grinding: Use 180#, 400#, 600#, 600# to polish the degreasing and rust-removing substrate in sequence, rinse with distilled water, then ultrasonically clean the polished substrate with alcohol, and dry it for later use.

[0039] (2)CrAl / Y 2 o 3 Alloy powd...

Embodiment 2

[0044] A kind of (Ni-Co) / CrAl / Y of this embodiment 2 o 3 For the composite electroplating method of the coating, the substrate used is Q235 steel, and the steps are as follows:

[0045] (1) The pretreatment method of the substrate is the same as that in Embodiment 1.

[0046] (2)CrAl / Y 2 o 3 Alloy powder preparation:

[0047] In 160 grams of CrAl powder with an average particle diameter of 20um, add 2 grams of spherical Y with an average particle diameter of 150nm 2 o 3 , the mixed powder is refined by QM-3SP2 planetary ball mill, the volume of the agate tank used is 100mL, argon gas is put into the ball mill tank, sealed, the speed of the ball mill is controlled at 500 rpm, and the positive and negative operations are alternated every half an hour , Ball milling 6h.

[0048] (3) Periodic commutation pulse composite electroplating on the surface of the substrate:

[0049] Composite electroplating is carried out to the substrate obtained by step (1): the formula of the ...

Embodiment 3

[0051] A kind of (Ni-Co) / CrAl / Y of this embodiment 2 o 3 For the composite electroplating method of the coating, the substrate used is T92 steel, and the steps are as follows:

[0052] (1) The pretreatment method of the substrate is the same as that in Embodiment 1.

[0053] (2)CrAl / Y 2 o 3 Alloy powder preparation:

[0054] Add 2 grams of spherical Y with an average particle diameter of 50nm in 240 grams of CrAl powder with an average particle diameter of 100um 2 o 3 , the mixed powder is refined by QM-3SP2 planetary ball mill. The volume of the agate tank used is 100mL. The ball mill tank is filled with argon gas, sealed, and the speed of the ball mill is controlled at 550 rpm. , ball milling 2h.

[0055] (3) Periodic commutation pulse composite electroplating on the surface of the substrate:

[0056] Composite electroplating is carried out to the substrate obtained by step (1): the formula of the electroplating solution is: NiSO 4 ·6H 2 O200g / L, NiCl 2 ·6H 2 O50...

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Abstract

The invention relates to a (Ni-Co) / CrAl / Y2O3 plating and a composite electroplating method thereof. The composite electroplating method comprises the following steps that CrAl / Y2O3 alloy powder is prepared, specifically, CrAl alloy powder and Y2O3 powder are mixed with the weight ratio being 80-120:1, then ball milling is conducted, and the CrAl / Y2O3 alloy powder is obtained; and the plating is prepared, specifically, a substrate is taken for composite electroplating, then periodic reverse pulse current is adopted for electroplating, and the (Ni-Co) / CrAl / Y2O3 plating is obtained, wherein composite electroplating comprises the substep that the CrAl / Y2O3 alloy powder is added into electroplate liquid with the adding amount being 20-50 g / L. The (Ni-Co) / CrAl / Y2O3 plating prepared through the composite electroplating method is delicate in crystal, good in binding force, compact, smooth, low in void ratio, good in toughness, high temperature oxidation resistance and hot corrosion resistance and low in production cost.

Description

technical field [0001] The invention relates to the technical field of electroplating, in particular to a nickel-cobalt / chromium-aluminum / yttrium oxide coating and a composite electroplating method thereof. Background technique [0002] High-temperature coatings such as Ni-Cr, Ni-Al, MCrAlY, etc. have the characteristics of good toughness, good thermal corrosion resistance, oxidation resistance and thermomechanical fatigue resistance, and have been extensively studied by researchers at home and abroad. The research of MCrA1Y coating by researchers at home and abroad mainly focuses on improving the coating composition and optimizing the coating structure. Design method to improve coating performance. At present, the methods for preparing the above-mentioned high-temperature coatings include: electron beam-physical vapor spraying, low-pressure or vacuum plasma spraying, explosive spraying, vacuum arc deposition, triple sputtering, and recently developed high-speed pigment spr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D5/18C25D3/56C25D15/00C25D5/36B22F9/04
CPCB22F9/04B22F2009/043C25D3/562C25D5/18C25D5/36C25D15/00
Inventor 翟伟杨波李茂东倪进飞黄国家张双红李仕平王志刚王晓伍振凌
Owner GUANGZHOU SPECIAL PRESSURE EQUIP INSPECTION & RES INST
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