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Electroplating solution for preparation of nanocrystalline nickel alloy plating and application thereof

A nanocrystalline and nickel alloy technology, applied in the field of nickel alloy coating preparation, can solve the problems of insufficient wear resistance, limitation, and low hardness of nickel coating, and achieve high wear resistance and hardness, compact structure, and fine grain Effect

Active Publication Date: 2012-10-24
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Notification number is that the Chinese patent of CN 1011316 B provides a kind of fast nickel-plating solution and nickel-plating method, and nickel-plating solution is made up of main salt containing nickel ion, complexing agent and auxiliary complexing agent, and complexing agent is hydroxycarboxylic acid Or its salts, the auxiliary complexing agent is an alkyl carboxylic acid, the electroplating solution has a faster electrodeposition speed, the cathode and the anode can move relative to each other, which improves the electroplating efficiency, but the hardness of the obtained nickel coating is lower than that of the chromium coating. Insufficient grinding degree limits its application
[0005] Notification number is that the Chinese patent of CN 100424232 C provides a kind of nickel electroplating liquid, contains at least two kinds of chelating agents selected from aminopolycarboxylic acid, polyacid and polyphosphoric acid, pH value is 4-9, nickel ion and chloride ion The ratio is 1 or less, the electroplating solution can effectively deposit the nickel layer only on the parts to be plated without corroding electronic parts made of ceramic composite materials or ceramic parts containing transition metal oxides, but its disadvantages are The hardness and wear resistance of the prepared electroplating layer are not enough
[0006] The Chinese patent with the notification number CN 101760767 B provides a method for electroplating nickel on a steel strip. The electroplating solution formula used is: 3504 ·7H 2 O≤550g / L, 20≤H 3 BO 3 ≤50g / L, 5≤anode active agent≤30g / L, 0.2≤sodium lauryl sulfate≤0.8g / L, this method is especially suitable for continuous nickel plating on perforated steel strips and punched steel strips for electrode manufacturing , but the prepared nickel coating also has the disadvantages of insufficient hardness and wear resistance

Method used

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  • Electroplating solution for preparation of nanocrystalline nickel alloy plating and application thereof
  • Electroplating solution for preparation of nanocrystalline nickel alloy plating and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0026] 1. Preparation of electroplating solution: use deionized water as solvent, prepare nickel sulfate with mass concentration of 30g / L, boric acid 10g / L, hydrazine hydrate 1g / L, hydroxylamine hydrochloride 9g / L, 2-ethylhexyl sodium sulfate 0.1g / L L's plating solution.

[0027] 2. Degreasing: Add sodium lauryl sulfate to a NaOH solution with a concentration of 5% by mass to obtain a mixed solution (the concentration of sodium lauryl sulfate is about 2g / L), which will be used as the low carbon steel of the metal substrate (3.14cm 2 Discs) were put into the mixed solution, and washed at 40° C. for about 10 minutes.

[0028] 3. Oxidation film removal treatment: use mechanical polishing and chemical polishing to perform surface oxidation film removal treatment on the degreased metal substrate in step 2.

[0029] 4. Preparation of nanocrystalline nickel alloy coating: use ammonia water to adjust the pH value of the electroplating solution obtained in step 1 to 3.5, use the pure...

Embodiment 2

[0031] 1. Preparation of electroplating solution: use deionized water as solvent, prepare nickel chloride with a mass concentration of 35g / L, sodium citrate 20g / L, formaldehyde 1g / L, hydroxylamine hydrochloride 9g / L, sodium ethylhexyl sulfate 0.2g / L L's plating solution.

[0032] 2. Degreasing: Add sodium lauryl sulfate to NaOH solution with a mass percentage concentration of 20% to obtain a mixed solution (the concentration of sodium lauryl sulfate is about 2g / L), which will be used as the low carbon steel of the metal substrate (3.14cm 2 disk) into the mixed solution, and washed at 70° C. for about 3 minutes.

[0033] 3. Oxidation film removal treatment: use mechanical polishing and chemical polishing to perform surface oxidation film removal treatment on the degreased metal substrate in step 2.

[0034] 4. Preparation of nanocrystalline nickel alloy coating: use ammonia water to adjust the pH value of the electroplating solution obtained in step 1 to 6, use the pure nicke...

Embodiment 3

[0036] 1. Preparation of electroplating solution: use deionized water as solvent, prepare basic nickel carbonate nickel 50g / L, sodium potassium pyrophosphate 10g / L, sodium hypophosphite 1g / L, hydroxylamine hydrochloride 1g / L, dodecane Sodium base sulfate 0.1g / L electroplating solution.

[0037] 2. Degreasing: Add sodium lauryl sulfate to NaOH solution with a concentration of 20% by mass to obtain a mixed solution (the concentration of sodium lauryl sulfate is about 2g / L), which will be used as the low carbon steel of the metal substrate (3.14cm 2disk) into the mixed solution, and washed at 70° C. for about 3 minutes.

[0038] 3. Oxidation film removal treatment: use mechanical polishing and chemical polishing to perform surface oxidation film removal treatment on the degreased metal substrate in step 2.

[0039] 4. Preparation of nanocrystalline nickel alloy coating: use ammonia water to adjust the pH value of the electroplating solution obtained in step 1 to 5, use the pure...

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Abstract

The invention discloses an electroplating solution for preparation of a nanocrystalline nickel alloy plating. The electroplating solution comprises, in terms of mass concentration, 30 to 80 g / L of a nickel salt, 1 to 10 g / L of a grain-refining agent, 10 to 20 g / L of a complexing agent and 0.1 to 1 g / L of a surfactant. The invention also discloses an electroplating method for preparation of a nanocrystalline nickel alloy plating by using the electroplating solution and the prepared nanocrystalline nickel alloy plating which contains a certain amount of at least one inorganic element selected from the group consisting of nitrogen, carbon and boron besides the metallic element of nickel, wherein the inorganic element is introduced by the grain-refining agent. Compared with the prior art, the nanocrystalline nickel alloy plating prepared in the invention has a crystal grain size of less than 10 nm, a hardness of more than 800 Hv and good wear resistance; compared with conventional preparation methods for chromic acid plated hard chromium, the electroplating method provided by the invention has the advantages of simple equipment and process, easy operation, no pollution caused by hexavalent chromium and the like and has good market application prospects and research values.

Description

technical field [0001] The invention relates to the technical field of preparation of metal material surface coatings, in particular to a preparation method of nickel alloy coatings. Background technique [0002] Electroplating has a history of more than 160 years, and the industrial application of electroplating methods to prepare coatings has also been around for a long time. The coating prepared by the electroplating method has a crystalline or nanocrystalline structure, and the nanocrystal has good mechanical properties such as high hardness and high wear resistance due to a large number of atoms on the grain boundary. Compared with amorphous materials, nanocrystalline materials have good plasticity and toughness, and ultrafine nanocrystalline materials can further improve the hardness of the coating due to the further refinement of grains. [0003] Hard chromium plating technology is a better method to increase surface hardness, which has the advantages of good surface...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D3/12
Inventor 曾志翔乌学东李明华薛群基
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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