Environment-friendly high-brightness medium-phosphorus chemical nickel-plating additive

An electroless nickel plating, environmentally friendly technology, applied in liquid chemical plating, metal material coating process, coating and other directions, can solve the problems of ecological environment and human survival damage, difficult wastewater treatment, inclusion of lead and other problems, to achieve the coating layer. Good bonding force, fast light output and excellent corrosion resistance

Active Publication Date: 2014-04-16
HARBIN SAN YONG GONG DA SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although these harmful heavy metals in traditional electroless nickel plating wastewater are added in a small amount, it is extremely difficult to treat the wastewater. If they accumulate in the environment due to improper treatment, they will cause serious pollution to the local environment. The nature of the heavy metal itself makes this pollution Produce long-term impact, the damage to the ecological environment and human survival is catastrophic
[0003] The addition of additives in the electroless nickel plating solution can not only prevent or delay the spontaneous decomposition of the electroless nickel plating solution, play a role in stabilizing the plating solution, but also speed up the reaction sometimes and improve the phosphorus content and internal stress of the electroless nickel plating layer. Therefore, For

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The formula and operating conditions are as follows: nickel sulfate 20g / L, sodium hypophosphite 25g / L, crystalline sodium acetate 12g / L, lactic acid 10ml / L, copper sulfate 1 mg / L, additive 8ml / L (additive A 4ml / L, Additive B 4ml / L), the pH value of the bath is 4.5, and the loading capacity is 1dm 2 / L, the plating temperature is 88-92°C, and the plating time is 10 minutes.

[0021] Preparation of plating solution: weigh the above-mentioned calculated amount of various drugs according to the volume of the plating solution, and then use deionized water to completely dissolve the solid drug, and dilute the viscous liquid drug into a dilute solution. First mix and dissolve nickel sulfate, sodium acetate and lactic acid, and then mix with the dissolved sodium hypophosphite solution. Control the amount of water used for operation at about 3 / 4 of the volume of the configured solution and not exceed the specified volume. Finally, adjust the pH value to 4.5 with 1:1 ammonia wat...

Embodiment 2

[0026] The formula and operating conditions are as follows: nickel sulfate 22g / L, sodium hypophosphite 28g / L, crystalline sodium acetate 15g / L, lactic acid 8ml / L, copper sulfate 1 mg / L, additive 8ml / L (additive A 2ml / L, Additive B 6ml / L), the pH of the bath is 4.7, and the loading is 1.5 dm 2 / L, the plating temperature is 88-92°C, and the plating time is 10 minutes.

[0027] Plating solution preparation: Weigh the above-mentioned calculated amount of various drugs according to the volume of the plating solution, and then use deionized water to completely dissolve the solid drugs, and dilute the viscous liquid drugs into a dilute solution. First mix and dissolve nickel sulfate, sodium acetate and lactic acid, and then mix with the dissolved sodium hypophosphite solution. Control the amount of water used for operation at about 3 / 4 of the volume of the configured solution and not exceed the specified volume. Finally, adjust the pH value to 4.7 with 1:1 ammonia water and then di...

Embodiment 3

[0032] The formula and operating conditions are as follows: nickel sulfate 25g / L, sodium hypophosphite 30g / L, crystalline sodium acetate 10g / L, lactic acid 5ml / L, copper sulfate 1 mg / L, additive 8ml / L (additive A 6ml / L, Additive B 2ml / L), the pH of the bath is 4.9, and the loading is 2 dm 2 / L, the plating temperature is 88-92°C, and the plating time is 10 minutes.

[0033] Plating solution preparation: Weigh the above-mentioned calculated amount of various drugs according to the volume of the plating solution, and then use deionized water to completely dissolve the solid drugs, and dilute the viscous liquid drugs into a dilute solution. First mix and dissolve nickel sulfate, sodium acetate and lactic acid, and then mix with the dissolved sodium hypophosphite solution. Control the amount of water used for operation at about 3 / 4 of the volume of the configured solution and not exceed the specified volume. Finally, adjust the pH value to 4.9 with 1:1 ammonia water and then dilu...

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PUM

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Abstract

The invention discloses an environment-friendly high-brightness medium-phosphorus chemical nickel-plating additive which is composed of components A and B, wherein the component A comprises the following raw materials: a 2-5mg/L mixture of nano copper and a soluble copper salt, 2-4mg/L rhenium sulfate, 1-4mg/L sodium allysulfonate (ALS), a complexing agent, a stabilizer, and 20-40g/L NaOH; the component B comprises the following raw materials: 1-4mg/L 1,4-bis(2-hydroxyethoxy)-2-butyne (BEO), 1-3mg/L N,N-diethylaminopropyne (DEP), 1-4mg/L dibenzenesulfonimide (BBI), and 2-4mg/L sodium hydroxymethanesulphonate (PN). The formula of the environment-friendly high-brightness medium-phosphorus chemical nickel-plating additive provided by the invention contains no heavy metal ions such as cadmium and lead, and is harmless to the environment; if applied to a chemical nickel-plating solution, the additive is capable of keeping the plating solution stable so that the obtained coating is even and compact, low in porosity, high in brightness and good in nitric acid resistance; more specifically, even though the nickel coating is soaked in concentrated nitric acid for 300 seconds, the nickel coating does not change color.

Description

technical field [0001] The invention relates to an environment-friendly high-brightness medium phosphorous electroless nickel plating additive and a preparation method thereof. Background technique [0002] Electroless nickel plating, also known as electroless nickel plating, is a surface treatment technology that relies on self-catalyzed chemical reactions to deposit nickel and nickel-based alloy coatings on metal surfaces in a solution containing nickel salts, reducing agents and other auxiliary components. The coating obtained by the above process has the advantages of high hardness, good corrosion resistance, wear resistance, and uniform coating thickness. It has been widely used in many fields such as machinery, electronics, petrochemical, mining, medical equipment, automobiles, and aviation. . The coating obtained by the medium phosphorus electroless nickel plating process has good corrosion resistance, while the traditional electroless nickel plating process contains...

Claims

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Application Information

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IPC IPC(8): C23C18/32
Inventor 吴波崔永利陈小宾
Owner HARBIN SAN YONG GONG DA SCI & TECH
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