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Nickel-phosphorus alloy electroplating solution and use method thereof

A nickel-phosphorus alloy and electroplating solution technology, which is applied in the field of nickel-phosphorus alloy electroplating solution, can solve the problems of large surface roughness of hydraulic piston rods, poor corrosion resistance of chrome-plated piston rods, etc., and achieve good bonding force, excellent corrosion resistance, The effect of increasing the degree of polarization of the cathode

Inactive Publication Date: 2012-04-11
GUANGZHOU HAIZHU DISTRICT JINSUIDA SURFACE TECH DEV CENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] China's hydraulic piston rods mostly use chrome plating for anti-corrosion treatment, and the electroplating companies in the industry basically follow the national standard GBll379-89 "Chrome Electroplating for Metal Covering Engineering" and GB / T12611-90 "Technical Requirements for Quality Control of Metal Parts Before Plating" Execution, however, under extreme conditions, the chrome-plated piston rod produced by the existing technology has poor corrosion resistance, and at the same time, the surface roughness of the produced hydraulic piston rod is relatively large

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] A kind of nickel-phosphorus alloy electroplating liquid, comprises the composition of following concentration: the nickel sulfate of 200g / L (that is, in the electroplating liquid of 1L, the quality of nickel sulfate is 200g), the nickel chloride of 35g / L, the boric acid of 38g / L, 62g / L sodium hypophosphite, 34g / L ammonium bifluoride, 1.0g / L cerium soluble salt, 0.08g / L sodium lauryl ether sulfate.

[0013] The solvent of the electroplating solution is water.

[0014] When plating, use 10% dilute sulfuric acid to adjust the pH of the electroplating solution to 2, then heat the electroplating solution to 60°C, put the hydraulic piston rod workpiece as the cathode into it, the anode is nickel metal, and the current density of the cathode is 1A / dm2.

Embodiment 2

[0016] A kind of nickel-phosphorus alloy electroplating solution, comprises the composition of following concentration: the nickel sulfate of 210g / L, the nickel chloride of 40g / L, the boric acid of 42g / L, the sodium hypophosphite of 64g / L, the ammonium bifluoride of 41g / L, 1.5g / L lanthanum soluble salt, 0.12g / L sodium dodecylbenzenesulfonate.

[0017] When plating, use 7% dilute sulfuric acid to adjust the pH of the electroplating solution to 3.0, then heat the electroplating solution to 70°C, put the hydraulic piston rod workpiece as the cathode into it, the anode is nickel metal, and the current density of the cathode is 2A / dm2.

Embodiment 3

[0019] A kind of nickel-phosphorus alloy electroplating solution, comprises the composition of following concentration: the nickel sulfate of 230g / L, the nickel chloride of 45g / L, the boric acid of 41g / L, the sodium hypophosphite of 70g / L, the ammonium bifluoride of 47g / L, 2.0g / L cerium soluble salt, 0.09g / L nonylphenol polyoxyethylene ether.

[0020] When plating, use 5% dilute sulfuric acid to adjust the pH of the electroplating solution to 3.2, then heat the electroplating solution to 75°C, put the workpiece as the cathode hydraulic piston rod into it, the anode is nickel metal, and the current density of the cathode is 1.6A / dm2.

[0021] After testing, the microhardness of the coating of the workpiece obtained in Example 1-3 is HV 600-700, soaked in 5% NaCl solution (pH=7) for 200 hours, no rust spots on the surface, the electroplating solution of Example 1-3 The current efficiencies η are 52%, 55%, and 52%, respectively, the deposition rate is 0.3-0.35μm / min, and the ph...

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PUM

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Abstract

The present invention discloses a nickel-phosphorus alloy electroplating solution. The solution comprises the following components: 200-250 g / L of nickel sulfate, 35-45 g / L of nickel chloride, 38-42 g / L of boric acid, 50-70 g / L of Sodium hypophosphite, 34-47 g / L of ammonium bifluoride, 1-2 g / L of a soluble salt of rare earth and 0.08-0.12 g / L of a surfactant. According to the present invention, a certain amount of rare earth elements are added to the electroplating solution of the present invention so as to significantly improve properties of the electroplating solution, the cathode polarizability during the electrodeposition process can be improved, the resulting electroplating layer has characteristics of compactness, uniformity, good bonding force, high hardness and excellent corrosion resistance, wherein the improved properties of the electroplating solution comprise improvement of current efficiency and improvement of dispersing ability.

Description

technical field [0001] The invention relates to a nickel-phosphorus alloy electroplating solution and a using method thereof. Background technique [0002] China's hydraulic piston rods mostly use chrome plating for anti-corrosion treatment, and the electroplating companies in the industry basically follow the national standard GBll379-89 "Chrome Electroplating for Metal Covering Engineering" and GB / T12611-90 "Technical Requirements for Quality Control of Metal Parts Before Plating" Execution, however, under extreme conditions, the chrome-plated piston rod produced by the prior art has poor corrosion resistance, and at the same time, the produced hydraulic piston rod has a relatively large surface roughness. Contents of the invention [0003] The purpose of the present invention is to provide a nickel-phosphorus alloy electroplating solution and its application method. [0004] The technical scheme that the present invention takes is: [0005] A nickel-phosphorus alloy e...

Claims

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Application Information

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IPC IPC(8): C25D3/56
Inventor 陈尊科朱裕源唐小慧杨先永
Owner GUANGZHOU HAIZHU DISTRICT JINSUIDA SURFACE TECH DEV CENT
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