CN105839083B - A kind of magnesium alloy nickel plating process - Google Patents

A kind of magnesium alloy nickel plating process Download PDF

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CN105839083B
CN105839083B CN201610346208.8A CN201610346208A CN105839083B CN 105839083 B CN105839083 B CN 105839083B CN 201610346208 A CN201610346208 A CN 201610346208A CN 105839083 B CN105839083 B CN 105839083B
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magnesium alloy
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chemical nickel
nickel
alloy sample
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CN105839083A (en
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帅和平
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SHENZHEN RUN SUN CHEMICAL TECHNOLOGY Co Ltd
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SHENZHEN RUN SUN CHEMICAL TECHNOLOGY Co Ltd
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    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
    • C23C18/16—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by reduction or substitution, e.g. electroless plating
    • C23C18/31—Coating with metals
    • C23C18/32—Coating with nickel, cobalt or mixtures thereof with phosphorus or boron
    • C23C18/34—Coating with nickel, cobalt or mixtures thereof with phosphorus or boron using reducing agents
    • C23C18/36—Coating with nickel, cobalt or mixtures thereof with phosphorus or boron using reducing agents using hypophosphites
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
    • C23C18/16—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by reduction or substitution, e.g. electroless plating
    • C23C18/1601—Process or apparatus
    • C23C18/1633—Process of electroless plating
    • C23C18/1635—Composition of the substrate
    • C23C18/1637—Composition of the substrate metallic substrate
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
    • C23C18/16—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by reduction or substitution, e.g. electroless plating
    • C23C18/18—Pretreatment of the material to be coated
    • C23C18/1803—Pretreatment of the material to be coated of metallic material surfaces or of a non-specific material surfaces
    • C23C18/1824—Pretreatment of the material to be coated of metallic material surfaces or of a non-specific material surfaces by chemical pretreatment
    • C23C18/1837—Multistep pretreatment
    • C23C18/1844—Multistep pretreatment with use of organic or inorganic compounds other than metals, first

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  • Chemical & Material Sciences (AREA)
  • General Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Chemically Coating (AREA)
  • Electroplating Methods And Accessories (AREA)

Abstract

The present invention proposes a kind of magnesium alloy nickel plating process, includes the following steps：1) pre-treatment：Oil removing, pickling, alkali cleaning and activation process are carried out to magnesium alloy sample；2) chemical nickel plating：Magnesium alloy sample after activation process is subjected to first time chemical nickel plating with the first chemical nickel-plating liquid, reaction temperature is 75 85 DEG C, is washed after reaction, then carries out second of chemical nickel plating with the second chemical nickel-plating liquid, and reaction temperature is 80 95 DEG C；3) it post-processes：Magnesium alloy sample after second of chemical nickel plating is washed, is dried up and drying.The plating nickel magnesium alloy that this method obtains has good corrosion resistance, wearability, electric conductivity, and magnesium alloy nickel bright property is good, surface uniformly, without point, binding force is good, and application value is high, has great practical significance to the application of magnesium alloy.

Description

A kind of magnesium alloy nickel plating process
Technical field
The invention belongs to alloy nickel plating technical fields, and in particular to a kind of magnesium alloy nickel plating process.
Background technology
Magnesium alloy is the metal material of current most lightweight, and density is about the 2/3 of aluminium, the 1/4 of iron, it also has intensity matter Amount is than high, rapid heat dissipation, and cushioning ability is strong, good stability of the dimension, easily recycling and the advantages that good electromagnetic shielding capability.Magnesium closes Nintaus is known as " 2l century green engineering materials " as the third-largest metal engineering material after steel, aluminium, produces phase The required energy of magnesium alloy of same volume is few more many than iron, aluminium, will not even be higher than production same volume polymer and be consumed energy Amount.
Magnesium and its alloy have many excellent physical and mechanical properties, have higher specific strength and specific stiffness, are easy to Machining, be easy to casting, damping property is good, can bear that larger impact shock load, electrical and thermal conductivity are good, magnetic shield performance is excellent It is good, it is a kind of ideal modern structure material.
For make magnesium alloy be applied to different occasions, it is often necessary to change its surface state with improve corrosion resistance, wearability, The performances such as solderability, dicoration.Coat can be formed on magnesium and Mg alloy surface there are many method at present, including is electroplated, is changed Learn plating, conversion film, anodic oxidation, hydrogenation film, organic coating, vapor deposition layer etc..Wherein simple effective method is exactly the most The metal or alloy of performance needed for one layer is plated on matrix by electrochemical method, i.e. plating and chemical plating.Then, now with magnesium Alloy nickel plating is all made of a chemical nickel plating processing, and the magnesium alloy after nickel plating has poor corrosion resistance, is susceptible to office Corrode in portion.
Invention content
Corrosion-resistant poor existing for existing magnesium alloy to solve the problems, such as, the present invention proposes a kind of magnesium alloy nickel plating process, should The plating nickel magnesium alloy that method obtains has good corrosion resistance, wearability, electric conductivity, and magnesium alloy nickel bright property is good, table Face uniformly, without point, binding force is good, and application value is high, has great practical significance to the application of magnesium alloy.
The technical proposal of the invention is realized in this way：
A kind of magnesium alloy nickel plating process, includes the following steps：
1) pre-treatment：Oil removing, pickling, alkali cleaning and activation process are carried out to magnesium alloy sample；
2) chemical nickel plating：Magnesium alloy sample after activation process is subjected to first time chemical plating with the first chemical nickel-plating liquid Nickel, reaction temperature are 75-85 DEG C, are washed after reaction, then carry out second of chemical nickel plating with the second chemical nickel-plating liquid, are reacted Temperature is 80-95 DEG C；
3) it post-processes：Magnesium alloy sample after second of chemical nickel plating is washed, is dried up and drying；
Wherein, the first chemical nickel-plating liquid group becomes：8-15g/L nickel sulfates, 15-25g/L sodium hypophosphites, 15-25mL/ L hydrofluoric acid, 3-8g/L lactic acid and 2-5mg/L corrosion inhibiter, surplus are deionized water, and pH adjusting agent is used in combination to adjust pH value to 3.5- 4.3；The second chemical nickel-plating liquid group becomes：20-30g/L nickel sulfates, 20-25g/L sodium hypophosphites, 10-15g/L sodium acetates, 3-6g/LC2H4O2S、5-10g/L C2H5NO2、10-15g/L NH4HF2With 2-5mg/L corrosion inhibiter, surplus is deionized water, is used in combination PH adjusting agent adjusts pH value to 4.2-5.2.
Further, the deoiling method is：At room temperature, it is cleaned by ultrasonic magnesium alloy sample 5-15min with trichloro ethylene.
Further, the acid process is：At 20-30 DEG C, magnesium alloy sample, which is put into the reaction time in pickle, is The group of 20-35s, the pickle become：The H of 20-35g/L3BO3, the NH of 30-45g/L4HF2Mass concentration is, 60mL/L's H3PO4, surplus is deionized water.
Further, the alkali washing method is：Magnesium alloy sample after pickling is put into alkali wash water, is reacted at 40-60 DEG C The group of 8-12min, the alkali wash water become：The Na of the NaOH of 35-55g/L, 2-8g/L3PO4·12H2O, surplus are deionization Water.
Further, the activation method is：Magnesium alloy sample after alkali cleaning is put into activating solution, at 35-45 DEG C, reaction Time is 2-5min, and the group of the activating solution becomes：50-150mL/L hydrofluoric acid, 10-45g/L sodium fluorides, surplus are deionization Water is used in combination pH adjusting agent to adjust pH value to 0.2-3.5.
Advantageous effect of the present invention：
The magnesium alloy nickel plating process of the present invention carries out nickel plating, the plating nickel magnesium alloy tool of acquisition using 2 chemical nickel plating methods Have good corrosion resistance, wearability, electric conductivity, magnesium alloy nickel bright property is good, surface uniformly, without point, binding force is good, Application value is high, has great practical significance to the application of magnesium alloy.
Specific implementation mode
Embodiment 1
A kind of magnesium alloy nickel plating process, includes the following steps：
1) pre-treatment：Oil removing, pickling, alkali cleaning and activation process are carried out to magnesium alloy sample；
Oil removing：At room temperature, it is cleaned by ultrasonic magnesium alloy sample 5min with trichloro ethylene；
Pickling：By the magnesium alloy sample washing after oil removing, then at 20 DEG C, magnesium alloy sample is put into pickle instead It is 35s between seasonable, the group of pickle becomes：The H of 20g/L3BO3, the NH of 45g/L4HF2Mass concentration is the H of 60mL/L3PO4, Surplus is deionized water；
Alkali cleaning：The magnesium alloy sample of pickling is washed, is then placed in alkali wash water, 12min, the alkali cleaning are reacted at 40 DEG C The group of liquid becomes：The Na of the NaOH of 35g/L, 2g/L3PO4·12H2O, surplus are deionized water；
Activation：The magnesium alloy sample washing after alkali cleaning is then placed in activating solution, at 35 DEG C, reaction time 5min, The group of the activating solution becomes：50mL/L hydrofluoric acid, 20g/L sodium fluorides, surplus are deionized water, and pH adjusting agent is used in combination to adjust pH It is worth to 1.2.
2) chemical nickel plating：Magnesium alloy sample after activation process is subjected to first time chemical plating with the first chemical nickel-plating liquid Nickel, reaction temperature are 75 DEG C, and reaction time 25min is washed after reaction, and the first chemical nickel-plating liquid group becomes：8g/L sulphur Sour nickel, 25g/L sodium hypophosphites, 15mL/L hydrofluoric acid, 8g/L lactic acid and 2mg/L corrosion inhibiter, surplus are deionized water, and pH tune is used in combination It saves agent and adjusts pH value to 3.5；Second of chemical nickel plating is carried out with the second chemical nickel-plating liquid, reaction temperature is 80 DEG C, when reaction again Between be 45min, the second chemical nickel-plating liquid group becomes：20g/L nickel sulfates, 25g/L sodium hypophosphites, 10g/L sodium acetates, 3g/ LC2H4O2S、10g/L C2H5NO2、15g/L NH4HF2With 5mg/L corrosion inhibiter, surplus is deionized water, and pH adjusting agent is used in combination to adjust PH value is to 4.2.
3) it post-processes：Magnesium alloy sample after second of chemical nickel plating is washed, drying can be obtained plating with drying Nickel magnesium alloy.
Embodiment 2
A kind of magnesium alloy nickel plating process, includes the following steps：
1) pre-treatment：Oil removing, pickling, alkali cleaning and activation process are carried out to magnesium alloy sample；
Oil removing：At room temperature, it is cleaned by ultrasonic magnesium alloy sample 10min with trichloro ethylene；
Acid process is：By the magnesium alloy sample washing after oil removing, then at 30 DEG C, magnesium alloy sample is put into pickling The reaction time is 20s in liquid, and the group of pickle becomes：The H of 25g/L3BO3, the NH of 30g/L4HF2Mass concentration is, 60mL/L's H3PO4, surplus is deionized water；
Alkali cleaning：The magnesium alloy sample of pickling is washed, is then placed in alkali wash water, 10min, the alkali cleaning are reacted at 50 DEG C The group of liquid becomes：The Na of the NaOH of 40g/L, 4g/L3PO4·12H2O, surplus are deionized water；
Activation：The magnesium alloy sample washing after alkali cleaning is then placed in activating solution, at 40 DEG C, reaction time 3min, The group of the activating solution becomes：80mL/L hydrofluoric acid, 10g/L sodium fluorides, surplus are deionized water, and pH adjusting agent is used in combination to adjust pH It is worth to 1.4.
2) chemical nickel plating：Magnesium alloy sample after activation process is subjected to first time chemical plating with the first chemical nickel-plating liquid Nickel, reaction temperature are 80 DEG C, and reaction time 20min is washed after reaction, and the first chemical nickel-plating liquid group becomes：10g/L sulphur Sour nickel, 20g/L sodium hypophosphites, 20mL/L hydrofluoric acid, 5g/L lactic acid and 3mg/L corrosion inhibiter, surplus are deionized water, and pH tune is used in combination It saves agent and adjusts pH value to 4.0；Second of chemical nickel plating is carried out with the second chemical nickel-plating liquid, reaction temperature is 85 DEG C, when reaction again Between be 40min, the second chemical nickel-plating liquid group becomes：25g/L nickel sulfates, 20g/L sodium hypophosphites, 12g/L sodium acetates, 4g/ LC2H4O2S、8g/L C2H5NO2、12g/L NH4HF2With 3mg/L corrosion inhibiter, surplus is deionized water, and pH adjusting agent is used in combination to adjust PH value is to 4.8.
3) it post-processes：Magnesium alloy sample after second of chemical nickel plating is washed, drying can be obtained plating with drying Nickel magnesium alloy.
Embodiment 3
A kind of magnesium alloy nickel plating process, includes the following steps：
1) pre-treatment：Oil removing, pickling, alkali cleaning and activation process are carried out to magnesium alloy sample；
Oil removing：At room temperature, it is cleaned by ultrasonic magnesium alloy sample 12min with trichloro ethylene；
Acid process is：By the magnesium alloy sample washing after oil removing, then at 25 DEG C, magnesium alloy sample is put into pickling The reaction time is 30s in liquid, and the group of pickle becomes：The H of 30g/L3BO3, the NH of 35g/L4HF2Mass concentration is, 60mL/L's H3PO4, surplus is deionized water；
Alkali cleaning：The magnesium alloy sample of pickling is washed, is then placed in alkali wash water, 10min, the alkali cleaning are reacted at 55 DEG C The group of liquid becomes：The Na of the NaOH of 45g/L, 6g/L3PO4·12H2O, surplus are deionized water；
Activation：The magnesium alloy sample washing after alkali cleaning is then placed in activating solution, at 40 DEG C, reaction time 3min, The group of the activating solution becomes：100mL/L hydrofluoric acid, 20g/L sodium fluorides, surplus are deionized water, and pH adjusting agent is used in combination to adjust PH value is to 2.4.
2) chemical nickel plating：Magnesium alloy sample after activation process is subjected to first time chemical plating with the first chemical nickel-plating liquid Nickel, reaction temperature are 82 DEG C, and reaction time 12min is washed after reaction, and the first chemical nickel-plating liquid group becomes：12g/L sulphur Sour nickel, 15g/L sodium hypophosphites, 15mL/L hydrofluoric acid, 3g/L lactic acid and 5mg/L corrosion inhibiter, surplus are deionized water, and pH tune is used in combination It saves agent and adjusts pH value to 4.2；Second of chemical nickel plating is carried out with the second chemical nickel-plating liquid, reaction temperature is 90 DEG C, when reaction again Between be 20min, the second chemical nickel-plating liquid group becomes：30g/L nickel sulfates, 22g/L sodium hypophosphites, 15g/L sodium acetates, 5g/ LC2H4O2S、5g/L C2H5NO2、12g/L NH4HF2With 2mg/L corrosion inhibiter, surplus is deionized water, and pH adjusting agent is used in combination to adjust PH value is to 5.0.
3) it post-processes：Magnesium alloy sample after second of chemical nickel plating is washed, drying can be obtained plating with drying Nickel magnesium alloy.
Embodiment 4
A kind of magnesium alloy nickel plating process, includes the following steps：
1) pre-treatment：Oil removing, pickling, alkali cleaning and activation process are carried out to magnesium alloy sample；
Oil removing：At room temperature, it is cleaned by ultrasonic magnesium alloy sample 15min with trichloro ethylene；
Acid process is：By the magnesium alloy sample washing after oil removing, then at 30 DEG C, magnesium alloy sample is put into pickling The reaction time is 20s in liquid, and the group of pickle becomes：The H of 35g/L3BO3, the NH of 35g/L4HF2Mass concentration is, 60mL/L's H3PO4, surplus is deionized water；
Alkali cleaning：The magnesium alloy sample of pickling is washed, is then placed in alkali wash water, 8min, the alkali cleaning are reacted at 60 DEG C The group of liquid becomes：The Na of the NaOH of 55g/L, 8g/L3PO4·12H2O, surplus are deionized water；
Activation：The magnesium alloy sample washing after alkali cleaning is then placed in activating solution, at 45 DEG C, reaction time 2min, The group of the activating solution becomes：130mL/L hydrofluoric acid, 40g/L sodium fluorides, surplus are deionized water, and pH adjusting agent is used in combination to adjust PH value is to 3.2.
2) chemical nickel plating：Magnesium alloy sample after activation process is subjected to first time chemical plating with the first chemical nickel-plating liquid Nickel, reaction temperature are 85 DEG C, and reaction time 10min is washed after reaction, and the first chemical nickel-plating liquid group becomes：12g/L sulphur Sour nickel, 15g/L sodium hypophosphites, 15mL/L hydrofluoric acid, 3g/L lactic acid and 5mg/L corrosion inhibiter, surplus are deionized water, and pH tune is used in combination It saves agent and adjusts pH value to 4.2；Second of chemical nickel plating is carried out with the second chemical nickel-plating liquid, reaction temperature is 95 DEG C, when reaction again Between be 15min, the second chemical nickel-plating liquid group becomes：30g/L nickel sulfates, 22g/L sodium hypophosphites, 15g/L sodium acetates, 5g/ LC2H4O2S、5g/L C2H5NO2、12g/L NH4HF2With 2mg/L corrosion inhibiter, surplus is deionized water, and pH adjusting agent is used in combination to adjust PH value is to 5.0.
3) it post-processes：Magnesium alloy sample after second of chemical nickel plating is washed, drying can be obtained plating with drying Nickel magnesium alloy.
Embodiment 5
A kind of magnesium alloy nickel plating process, includes the following steps：
1) pre-treatment：Oil removing, pickling, alkali cleaning and activation process are carried out to magnesium alloy sample；
Oil removing：At room temperature, it is cleaned by ultrasonic magnesium alloy sample 10min with trichloro ethylene；
Acid process is：By the magnesium alloy sample washing after oil removing, then at 25 DEG C, magnesium alloy sample is put into pickling The reaction time is 20s in liquid, and the group of pickle becomes：The H of 35g/L3BO3, the NH of 35g/L4HF2Mass concentration is, 60mL/L's H3PO4, surplus is deionized water；
Alkali cleaning：The magnesium alloy sample of pickling is washed, is then placed in alkali wash water, 10min, the alkali cleaning are reacted at 58 DEG C The group of liquid becomes：The Na of the NaOH of 55g/L, 8g/L3PO4·12H2O, surplus are deionized water；
Activation：The magnesium alloy sample washing after alkali cleaning is then placed in activating solution, at 45 DEG C, reaction time 2min, The group of the activating solution becomes：130mL/L hydrofluoric acid, 40g/L sodium fluorides, surplus are deionized water, and pH adjusting agent is used in combination to adjust PH value is to 3.5.
2) chemical nickel plating：Magnesium alloy sample after activation process is subjected to first time chemical plating with the first chemical nickel-plating liquid Nickel, reaction temperature are 85 DEG C, and reaction time 10min is washed after reaction, and the first chemical nickel-plating liquid group becomes：15g/L sulphur Sour nickel, 20g/L sodium hypophosphites, 15mL/L hydrofluoric acid, 4g/L lactic acid and 5mg/L corrosion inhibiter, surplus are deionized water, and pH tune is used in combination It saves agent and adjusts pH value to 4.3；Second of chemical nickel plating is carried out with the second chemical nickel-plating liquid, reaction temperature is 95 DEG C, when reaction again Between be 15min, the second chemical nickel-plating liquid group becomes：30g/L nickel sulfates, 25g/L sodium hypophosphites, 12g/L sodium acetates, 6g/ LC2H4O2S、7g/L C2H5NO2、15g/L NH4HF2With 4mg/L corrosion inhibiter, surplus is deionized water, and pH adjusting agent is used in combination to adjust PH value is to 5.2.
3) it post-processes：Magnesium alloy sample after second of chemical nickel plating is washed, drying can be obtained plating with drying Nickel magnesium alloy.
Embodiment 6
The plating nickel magnesium alloy that embodiment 1-5 is prepared is detected according to national military standard GJB150A-2009 thermal shock tests, inspection Testing temperature is 220 DEG C；It is detected according to national military standard GJB150A-2009 salt spray tests, testing conditions are 35 DEG C, and 5wt%NaCl is molten Liquid, continuously spray 48h, the results are shown in Table 1：
1 nickel plating Properties of Magnesium Alloy testing result of table
From table 1 it follows that plating nickel magnesium alloy prepared by the present invention has good corrosion resistance, wearability, conduction Property, magnesium alloy nickel bright property is good, surface uniformly, without point, binding force is good.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention With within principle, any modification, equivalent replacement, improvement and so on should all be included in the protection scope of the present invention god.

Claims (2)

1. a kind of magnesium alloy nickel plating process, which is characterized in that include the following steps：
1) pre-treatment：Oil removing, pickling, alkali cleaning and activation process are carried out to magnesium alloy sample；
2) chemical nickel plating：Magnesium alloy sample after activation process is subjected to first time chemical nickel plating with the first chemical nickel-plating liquid, instead It is 75-85 DEG C to answer temperature, is washed after reaction, then carry out second of chemical nickel plating, reaction temperature with the second chemical nickel-plating liquid It is 80-95 DEG C；
3) it post-processes：Magnesium alloy sample after second of chemical nickel plating is washed, is dried up and drying；
Wherein, the first chemical nickel-plating liquid group becomes：8-15g/L nickel sulfates, 15-25g/L sodium hypophosphites, 15-25mL/L hydrogen Fluoric acid, 3-8g/L lactic acid and 2-5mg/L corrosion inhibiter, surplus are deionized water, and pH adjusting agent is used in combination to adjust pH value to 3.5-4.3； The second chemical nickel-plating liquid group becomes：20-30g/L nickel sulfates, 20-25g/L sodium hypophosphites, 10-15g/L sodium acetates, 3-6g/ LC2H4O2S、5-10g/L C2H5NO2、10-15g/L NH4HF2With 2-5mg/L corrosion inhibiter, surplus is deionized water, and pH tune is used in combination It saves agent and adjusts pH value to 4.2-5.2；The deoiling method is：At room temperature, it is cleaned by ultrasonic magnesium alloy sample 5- with trichloro ethylene 15min；The method of the pickling is：At 20-30 DEG C, it is 20-35s that magnesium alloy sample, which is put into pickle the reaction time, The group of the pickle becomes：The H of 20-35g/L3BO3, the NH of 30-45g/L4HF2, the H of 60mL/L3PO4, surplus is deionization Water；The activation method is：Magnesium alloy sample after alkali cleaning is put into activating solution, at 35-45 DEG C, reaction time 2- The group of 5min, the activating solution become：50-150mL/L hydrofluoric acid, 10-45g/L sodium fluorides, surplus are deionized water, and pH is used in combination Conditioning agent adjusts pH value to 0.2-3.5.
2. magnesium alloy nickel plating process according to claim 1, which is characterized in that the alkali washing method is：After pickling Magnesium alloy sample is put into alkali wash water, and 8-12min is reacted at 40-60 DEG C, and the group of the alkali wash water becomes：35-55g/L's The Na of NaOH, 2-8g/L3PO4·12H2O, surplus are deionized water.
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GB2560969A (en) * 2017-03-30 2018-10-03 Ajt Eng Ltd Electroless plating
CN110565079A (en) * 2019-10-11 2019-12-13 青海民族大学 Pretreatment method for magnesium alloy chemical plating

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CN101074479A (en) * 2006-05-19 2007-11-21 何靖 Method for treating magnesium-alloy workpiece, workpiece therefrom and composition therewith
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