Electrolyte additive used for electroforming high hardness and low stress nickel workpiece

An electrolyte additive and high hardness technology, applied in the direction of electroforming, electrolysis, etc., can solve the problems of large consumption, low hardness, easy deformation, etc., and achieve the effect of low addition and consumption and high hardness

Inactive Publication Date: 2017-02-15
HENAN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, nickel electroformed parts based on the above additives often have disadvantages such as low hardness, high stress, easy deformation, and rough surface (requires secondary processing), which are far from meeting the application requirements of modern nickel electroforming production.
Moreover, the consumption of the above-mentioned additives is large and there are

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0013] The electrolyte components used are: nickel sulfate (NiSO 4 .6H 2 O) 300g / L, nickel chloride (NiCl 2 .6H 2 O) 10g / L, boric acid 40g / L, pH 4.5-4.8, temperature 55 o C, the current density is 2A / dm 2 , the electroforming time is 1 hour. The components of the additive are 150g / L sodium saccharin, 30g / L ethoxylated butynediol, 10g / L N,N-diethylpropynylamine sulfate, 80g / L pyridinium hydroxyl Propanyl sulfonate, 1g / L of S-carboxyethylisothiourea chloride and 8g / L of sodium vinylsulfonate, 0.6g / L of lanthanum chloride (LaCl 3 .7H 2 O) and 0.3g / L cerium chloride (CeCl 3 .7H 2 o). The opening volume of the additive is 1.5mL / L, and the consumption is 70mL / kA.h. The surface of the obtained electroformed layer is bright and smooth without burrs and pinholes. The hardness value is 500±52HV and the stress value is 8±1.8MPa.

example 2

[0015] The electrolyte components used are: nickel sulfamate (Ni(SO 3 NH 2 ) 2 4H 2 O) 450g / L, nickel chloride (NiCl 2 .6H 2 O) 8g / L, boric acid 40g / L, pH 4.8-5.0, temperature 55 o C, the current density is 2A / dm 2 , the electroforming time is 1 hour. Described a kind of high-performance nickel electroforming additive that can be used for nickel sulfamate electrolyte system and nickel sulfate electrolyte system, the concentration of each component is 200g / L sodium saccharin, 50g / L ethoxylated butyl Alkyne diol, 20g / L of N,N-diethylpropynylamine sulfate, 120 / L of pyridinium hydroxypropyl sulfide, 2g / L of S-carboxyethylisothiourea chloride, 10g / L sodium vinyl sulfonate, 0.4g / L lanthanum chloride (LaCl 3 .7H 2 O) and 0.2g / L cerium chloride (CeCl 3 .7H 2 o). The opening volume of the additive is 1mL / L, and the consumption is 50mL / kA.h. The surface of the obtained electroformed layer is bright and smooth, without burrs and pinholes, the hardness value is 580±48HV, and...

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PUM

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Abstract

The invention discloses an electrolyte additive used for electroforming a high hardness and low stress nickel workpiece. The additive comprises an organic additive and a rare earth additive and is characterized in that the organic additive comprises 150-200 g/L of sodium saccharin, 30-50 g/L of ethoxylation butynediol, 10-20 g/L of N,N-diethyl-2-propyneammonium sulfate, 80-120 g/L of PPSOH, 1-2 g/L of S-carboxyethylisothiuronium chloride and 8-10 g/L of sodium vinylsulfonate; and the rare earth additive comprises 0.4-0.8 g/L of lanthanum chloride (LaCl3.7H2O) and 0.2-0.4 g/L of cerium chloride (CeCl3.7H2O). By means of the electrolyte additive, the process effects of a bright and smooth surface, high hardness, low inner stress and the like can be achieved, an electrolyte is easy to maintain, the adding amount and the consumption amount are small, and the electrolyte additive can be used for a nickel aminosulfonate electrolyte system and a nickel sulfate electrolyte system.

Description

technical field [0001] The invention relates to the technical field of electroforming, in particular to an electrolyte additive for electroforming high-hardness and low-stress nickel parts. Background technique [0002] Nickel is one of the most commonly used electroforming metals. At present, in industrial production, the electroforming of nickel is mostly carried out based on nickel sulfate electrolyte system and nickel sulfamate electrolyte system. The surface morphology, smoothness, mechanical and physical and chemical properties of electroformed nickel parts are not only related to the basic bath composition, additive composition and addition amount, but also related to operating parameters such as temperature, stirring method and intensity, current density and other factors. related. Among them, the morphology and performance of electroformed nickel parts are most sensitive to the additive composition and amount added in the electrolyte system. Moreover, in many cas...

Claims

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Application Information

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IPC IPC(8): C25D1/00
CPCC25D1/00
Inventor 明平美陈月涛杨文娟秦歌李欣潮
Owner HENAN POLYTECHNIC UNIV
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