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Electro-deposition preparation method of Ni-Co-C alloy substitute hard chromium plating

A ni-co-c, 1.ni-co-c technology is applied in the field of preparation of Ni-Co-C alloy substitute hard chrome plating, which can solve the problems of carcinogenicity, harm, genetic deletion, etc., and achieve corrosion resistance. It has good bonding force, solves heavy pollution of hexavalent chromium, and has good wear resistance and corrosion resistance.

Active Publication Date: 2012-03-28
HARBIN INST OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although hexavalent chromium coating has good performance and is widely used, hexavalent chromium is extremely harmful to the environment and the human body. It is carcinogenic and may even cause the loss of genetic genes. Hexavalent chromium plating solution is also one of the most polluted and most difficult sources of electroplating pollution.
There are also coatings with excellent performance in these coatings, but these chromium coatings also have their own defects, especially in terms of hardness, wear resistance and corrosion resistance of the coatings, which have certain limitations compared with hexavalent chromium coatings. Therefore, more researchers are needed to participate in the research and development of chrome-substitute coatings, so as to obtain chrome-substitute coatings with better performance

Method used

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  • Electro-deposition preparation method of Ni-Co-C alloy substitute hard chromium plating
  • Electro-deposition preparation method of Ni-Co-C alloy substitute hard chromium plating
  • Electro-deposition preparation method of Ni-Co-C alloy substitute hard chromium plating

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specific Embodiment approach 1

[0013] Specific embodiment 1: The electrodeposition preparation method of Ni-Co-C alloy substitute hard chromium coating of this embodiment is carried out according to the following steps: 1. Weigh 50~150g nickel salt, 5~15g cobalt salt, 1~10g NiCl 2 ·6H 2 O, 20-50g boric acid, 100-300g ammonium citrate, 5-50g carbon-containing compounds, 1-10ml NI3 # Fast high leveling nickel plating gloss agent A, 0.15~1.5g stress reliever; 2. Dissolve weighed ammonium citrate in 400~600ml water at 30~60℃, add nickel salt and cobalt Salt and stir until dissolved, then add boric acid and NiCl 2 ·6H 2 O and stir until dissolved, then add the carbon-containing compound and stir until dissolved, then add NI3 # Quick high-leveling nickel plating gloss agent A and stress reliever and stir until dissolved, then add water to make the volume to 1L to obtain Ni-Co-C alloy plating solution; 3. The plating parts are removed by conventional alkaline degreasing or electrochemical degreasing After the oil is...

Embodiment 1

[0019] The electrodeposition preparation method of Ni-Co-C alloy substitute hard chromium coating is carried out according to the following steps: 1. Weigh 100g of nickel salt, 10g of cobalt salt, and 1g of NiCl 2 ·6H 2 O, 30g of boric acid, 250g of ammonium citrate, 15g of carbon-containing compounds, 3ml of NI3 # Quick high-leveling nickel plating gloss agent A, 0.5g stress reliever; 2. Dissolve weighed ammonium citrate in 600ml water at 40℃, add nickel salt and cobalt salt and stir until dissolved, Then add boric acid and NiCl 2 ·6H 2 O and stir until dissolved, then add the carbon-containing compound and stir until dissolved, then add NI3 # Quick high-leveling nickel plating gloss agent A and stress reliever and stir until dissolved, then add water to make the volume to 1L to obtain Ni-Co-C alloy plating solution; 3. The plating parts are removed by conventional alkaline degreasing or electrochemical degreasing After the oil is washed with water, and then activated in hydroch...

Embodiment 2

[0027] The electrodeposition preparation method of Ni-Co-C alloy substitute hard chromium coating is carried out according to the following steps: 1. Weigh 150g of nickel salt, 15g of cobalt salt, and 1g of NiCl 2 ·6H 2 O, 40g of boric acid, 150g of ammonium citrate, 30g of carbon-containing compounds, 7ml of NI3 # Fast high leveling nickel plating gloss agent A, 0.4g stress reliever; 2. Dissolve weighed ammonium citrate in 400ml of water at 50℃, add nickel salt and cobalt salt and stir until dissolved, Then add boric acid and NiCl 2 ·6H 2 O and stir until dissolved, then add the carbon-containing compound and stir until dissolved, then add NI3 # Quick high-leveling nickel plating gloss agent A and stress reliever and stir until dissolved, then add water to make the volume to 1L to obtain Ni-Co-C alloy plating solution; 3. The plating parts are removed by conventional alkaline degreasing or electrochemical degreasing After the oil is washed with water, and then activated in hydro...

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Abstract

The invention discloses an electro-deposition preparation method of Ni-Co-C alloy substitute hard chromium plating, which relates to the preparation method of Ni-Co-C alloy substitute hard chromium plating. The method one comprises the steps of: taking nickel salt, cobalt salt, NiC12.6H2O, boric acid, ammonium citrate, a carbon-containing compound, an N13# rapid high-leveling nickel plating glossing agent A and a stress relieving agent; preparing plating solution; and carrying out electroplating on a plated part. The method two comprises the steps of: taking NiC12.6H2O, cobalt salt, boric acid, ammonium citrate, a carbon-containing compound, an N13# rapid high-leveling nickel plating glossing agent A and a stress relieving agent; preparing plating solution; and carrying out electroplating on a plated part. In the invention, the Ni-Co-C alloy plating with uniform brightness, hardness of 690-770HV50 and favorable corrosion resistance is obtained at a deposition speed of 32 microns per hour; in the electroplating process, the cathode current efficiency is higher than 60%; and the hardness of the plating can be improved to 1000-1100HV50 after undergoing heat treatment for 1-3h at a temperature between 150-400DEG C.

Description

Technical field [0001] The invention relates to a preparation method of a Ni-Co-C alloy substitute hard chromium coating. Background technique [0002] The traditional chromium plating technology uses hexavalent chromium (chromic acid) as the main electroplating material. The process is simple and easy to maintain. The hexavalent chromium coating obtained is bright, high in hardness, wear resistance, and corrosion resistance. Therefore, Hexavalent chromium coatings are widely used in decorative coatings, functional coatings, and repair of workpieces. Although the hexavalent chromium coating has good performance and is widely used, hexavalent chromium is harmful to the environment and the human body. It will directly damage the human digestive tract, respiratory tract and nasal mucosa, and easily lead to dermatitis and eczema. It has carcinogenic effects and may even cause the loss of genetic genes. Hexavalent chromium plating solution is also one of the most polluted and difficu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D3/56
Inventor 杨培霞安茂忠任雪峰曾鑫郭伟荣项昕
Owner HARBIN INST OF TECH
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