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Cobalt-tungsten-nickel-phosphorus alloy electroplating liquid

A technology of alloy electroplating solution and solution, which is applied in the field of alloy electroplating solution, can solve the problems of pinholes in plating thickness, limited application range, slow electrodeposition speed, etc., and achieve good corrosion resistance and friction resistance, high current efficiency, and environmental hazards small effect

Inactive Publication Date: 2011-08-24
合鸿新材科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above plating types have disadvantages such as high brittleness (iron-tungsten alloy), slow electrodeposition speed (iron-nickel-tungsten alloy), micro-cracks on the surface, pinholes in thick plating, etc., which limit their application range.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] First weigh the mixture of 45 grams of sodium citrate and 15 grams of polyphosphoric acid, add 1000 milliliters of deionized water, stir until dissolved; then weigh 1 gram of cobalt sulfate (CoSO 4 .7H 2 O), 120 grams of nickel sulfate (NiSO 4 .7H 2 O), 5 grams of phosphorous acid were added to the above solution, stirred at room temperature until dissolved; then the above solution was heated to 65°C in a water bath, and 10 grams of sodium tungstate (Na 2 WO 4 .2H 2 O) join in this solution, stir until dissolving, then add the mixture of 2 grams of saccharin and 0.2 gram of dimethylhexynol, adjust the pH value of the solution to 2 with sodium hydroxide, then heat the solution to 65 with a water bath ℃, graphite as anode, workpiece as cathode, current density is 8A / dm 2 Under electroplating, a bright tungsten alloy coating can be obtained.

Embodiment 2

[0017] First weigh the mixture of 75 grams of sodium citrate and 25 grams of polyphosphoric acid, add 1000 milliliters of deionized water, stir until dissolved; then weigh 5 grams of cobalt sulfate (CoSO 4 .7H 2 O), 180 grams of nickel sulfate (NiSO 4 .7H 2 O), 20 grams of phosphorous acid were added to the above solution, stirred at room temperature until dissolved; then the above solution was heated to 65°C in a water bath, and 30 grams of sodium tungstate (Na 2 WO 4 .2H 2 O) join in this solution, stir until dissolving, then add the mixture of 10 grams of saccharin and 1 gram of dimethylhexynol, adjust the pH value of the solution to 4 with sodium hydroxide, then heat the solution to 65 with a water bath ℃, graphite as anode, workpiece as cathode, current density is 8A / dm 2 Under electroplating, a bright tungsten alloy coating can be obtained.

Embodiment 3

[0019] First weigh the mixture of 60 grams of sodium citrate and 20 grams of polyphosphoric acid, add 1000 milliliters of deionized water, stir until dissolved; then weigh 3 grams of cobalt sulfate (CoSO 4 .7H 2 O), 150 grams of nickel sulfate (NiSO 4 .7H 2 0), 13 grams of phosphorous acid were added to the above solution, stirred at room temperature until dissolved; then the above solution was heated to 65°C in a water bath, and 20 grams of sodium tungstate (Na 2 WO 4 .2H 2 O) join in this solution, stir until dissolving, then add the mixture of 6 grams of saccharin and 0.6 gram of dimethylhexynol, adjust the pH value of the solution to 3 with sodium hydroxide, then heat the solution to 65 with a water bath ℃, graphite as anode, workpiece as cathode, current density is 8A / dm 2 Under electroplating, a bright tungsten alloy coating can be obtained.

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PUM

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Abstract

The invention discloses cobalt-tungsten-nickel-phosphorus alloy electroplating liquid which is prepared from the following ingredients: 10-30g / L of sodium tungstate, 1-5g / L of cobalt sulfate, 120-180g / L of nickel sulfate, 5-20g / L of phosphorous acid, 60-100g / L of complexing agent and 2-12g / L of bright additive, making the solution up to 1000ml after deionized water added. Compared with the prior art, the electroplating liquid of the invention has the following advantages: the plating prepared from the electroplating liquid is amorphous, has no microcracks on the surface and has good corrosionresistance and abrasion resistance; the chemical reagents do little harm to the environment; the electroplating liquid has stable process and simple ingredients, is convenient to operate and can be stored for a long term after preparation; and the electroplating liquid does not exhaust acid mist during working and has high current efficiency.

Description

technical field [0001] The invention relates to an alloy electroplating solution in the field of material surface treatment, in particular to a cobalt-tungsten-nickel-phosphorus alloy electroplating solution. Background technique [0002] At present, partial wear and corrosion in the field of petroleum machinery are serious, and there is no satisfactory surface treatment technology that can be used for surface treatment of petroleum machinery, which can be anti-corrosion, wear-resistant and low-cost at the same time. With the continuous consumption of petroleum resources, mining The petroleum environment is getting worse and worse, and the requirements for corrosion resistance and friction resistance of petroleum equipment are getting higher and higher. Therefore, the study of anti-corrosion and wear-resistant technology of petroleum machinery has always been a topic of people's concentration. [0003] A possible solution is to electroplate tungsten alloys. Tungsten cannot ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25D3/56
Inventor 赵汝山李淦
Owner 合鸿新材科技有限公司
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