Nickel alloy composition modulated multilayer alloy (CMMA) coating and preparation method thereof

A nickel alloy and coating technology, which is applied in the field of nickel alloy CMMA coating and its preparation, can solve the problems of low corrosion resistance, and achieve the effects of improving corrosion resistance, improving operability, and improving hardness

Inactive Publication Date: 2016-08-31
HOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Technical problem solved: the present invention overcomes the technical problem of low corrosion resistance of the nickel-based alloy coating in the prior art due to the formation of through holes, and provides a Nickel alloy CMMA coating and preparation method thereof

Method used

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  • Nickel alloy composition modulated multilayer alloy (CMMA) coating and preparation method thereof
  • Nickel alloy composition modulated multilayer alloy (CMMA) coating and preparation method thereof
  • Nickel alloy composition modulated multilayer alloy (CMMA) coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Take 250g of nickel sulfate, 2g of trimethylamine borane, 60g of boric acid, 4g of SiC with a particle size of 1 μm, 1g of saccharin and 0.01g of sodium lauryl sulfate, prepare 1 liter of electrolyte with deionized water, and use sodium hydroxide solution Adjust its pH value to 3.5, use a water bath to control the temperature at 45°C, mechanically stir for 1 hour, and ultrasonically disperse for 30 minutes.

[0033] set up i 1 =1A / dm 2 , i 2 =4A / dm 2 , T=2s, N=500, graphite as anode, Q235 steel as cathode, current density at i 1 , i 2 between continuous linear changes, such as figure 1 As shown, the deposition of Ni-B / SiC 1.0 / 4.0 / 50 0 , where the subscript 1.0 represents i 1 =1A / dm 2 , the subscript 4.0 represents i 2 =4A / dm 2 , the subscript 500 represents the total number of coating layers is 500.

[0034] Ni-B / SiC obtained by the above method 1.0 / 4.0 / 500 Coating, the total number of coating layers is 500, and the total thickness is about 66 μm. The...

Embodiment 2

[0036] Take 150g of nickel sulfate, 120g of nickel chloride, 6g of trimethylamine borane, 30% of boric acid, 5g of SiC with a particle size of 1 μm, 2g of saccharin, and 0.4g of AES, and prepare 1 liter of electrolyte solution with deionized water, using sodium hydroxide solution Adjust its pH value to 4.0, use a water bath to control the temperature at 60°C, mechanically stir for 1 hour, and ultrasonically disperse for 15 minutes.

[0037] set up i 1 =1.0A / dm 2 , i 2 =5A / dm 2 , T=4s, N=250, nickel plate as anode, Q235 steel as cathode, current density at i 1 , i 2 between continuous nonlinear changes, such as figure 2 As shown, the deposition of Ni-B / SiC 1.0 / 5.0 / 250 , where the subscript 1.0 represents i 1 =1.0A / dm 2 , the subscript 5.0 represents i 2 =5.0A / dm 2 , the subscript 250 represents the total number of layers of the coating is 250.

[0038] Ni-B / SiC obtained by the above method 1.0 / 5.0 / 250 Coating, the total number of coating layers is 250, and t...

Embodiment 3

[0040] Take 150g of nickel sulfate, 50g of nickel chloride, 120g of sodium tungstate, 12g of sulfamic acid, and TiO with a particle size of 1 μm 2 15g, ammonium chloride 65g, AES 0.4g, use deionized water to prepare 1 liter of electrolyte solution, use sodium hydroxide solution to adjust its pH value to 7.0, use a water bath to control the temperature at 70 ° C, mechanically stir for 1 hour, ultrasonic Disperse for 15 minutes.

[0041] set up i 1 =1.0A / dm 2 ， i 2 =5A / dm 2 , T=4s, N=250, nickel plate as anode, Q235 steel as cathode, current density at i 1 i 2 Continuous linear change between, and deposition of Ni-W / TiO 21.0 / 5.0 / 250 , where the subscript 1.0 represents i 1 =1.0A / dm 2 , the subscript 5.0 represents i 2 =5.0A / dm 2 , the subscript 250 represents the total number of layers of the coating is 250.

[0042] Ni-W / TiO obtained by the above method 21.0 / 5.0 / 250 Coating, the total number of coating layers is 250, the total thickness is about 94 μm, the mi...

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Abstract

The invention provides a nickel alloy composition modulated multilayer alloy (CMMA) coating and a preparation method thereof. The nickel alloy CMMA coating is of a multilayer structure, and the number of layers of the nickel alloy CMMA coating is 50-1000. The coating structure comprises a nanoparticle phase and amorphous embedded nanocrystalline composite structure phase. The preparation method of the nickel alloy CMMA coating comprises the step that during electrodeposition, the nickel alloy CMMA coating with the compositions and structure changing periodically is obtained by changing the current density periodically to control the liquid-phase mass transfer process of an electrolyte in the cathode. According to the nickel alloy CMMA coating, performance design and microstructure adjustment and control can be achieved, the bonding force of the nickel alloy CMMA coating and a base material is good, the corrosion resistance and the abrasion resistance are excellent, and the nickel alloy CMMA coating can be widely applied to surface protection treatment of offshore engineering machines, water engineering metal structures and mechanical parts.

Description

technical field [0001] The invention belongs to the technical field of metal protection, and in particular relates to a nickel alloy CMMA coating and a preparation method thereof. Background technique [0002] Ni-based W, Mo, and B alloys are widely used in the fields of aerospace, electronic devices, automotive hubs, and marine machinery protection due to their good hardness, corrosion resistance, and mechanical strength. In recent years, the preparation of nano-composite cermet coatings by combining nano-ceramic particles in alloys has become a research hotspot in recent years, such as adding TiO to Ni-based alloys. 2 , α-Al 2 o 3 , SiO 2 , SiC, TiN, etc., can not only improve the hardness and wear resistance of the alloy, but also enhance its corrosion resistance. However, due to the cathodic hydrogen evolution and residual stress in the preparation process of electrochemical deposition, there will be capillary pores, through holes or micro-cracks in the coating. Thes...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D3/56C25D5/14C25D5/18
CPCC25D3/562C25D5/14C25D5/18
Inventor 李保松张薇薇张文环宇星
Owner HOHAI UNIV
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