Method for chemical plating of nickel-boron alloy on magnesium alloy surface

A surface chemistry, magnesium alloy technology, applied in liquid chemical plating, metal material coating process, coating and other directions, can solve the problems of high corrosion rate, increased cost of chemical plating, and inability to replenish nickel, and achieve good bonding force and Corrosion resistance, good practical application prospects, good deposition effect

Inactive Publication Date: 2006-09-06
XIAMEN UNIV
View PDF1 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] 2) The binding force of direct electroless plating Ni-P with fluoride activation is not high (Chinese patent: 02144834.5), and pre-plating is required in order to improve the binding force, resulting in cumbersome process (Corrosion Science, 2004, 46: 1467-1477)
[0010] 2) The Mg alloy is active, and loose MgO will form rapidly on the surface of the alloy, which hinders the formation of metal bonds between the deposited metal and the substrate
[0011] 3) Traditional electroless nickel plating generally chooses nickel chloride or nickel sulfate as the main salt, and most plating solutions are corrosive to magnesium, especially those containing Cl - , SO 4 2- In the salt solution of Mg, the corrosion rate of Mg is larger; under no stress state, the corrosion rate of Mg-Al-Zn alloy in different anion media is Cl - > SO 4 2- >NO 3 - >Ac - >CO 3 2-
But the price of basic nickel carbonate is too high, and the cost of chemical plating doubles; in addition, basic nickel carbonate is insoluble in water,

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for chemical plating of nickel-boron alloy on magnesium alloy surface
  • Method for chemical plating of nickel-boron alloy on magnesium alloy surface
  • Method for chemical plating of nickel-boron alloy on magnesium alloy surface

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032]1) At room temperature, add sodium carbonate (15g), sodium phosphate (15g) and OP-10 (5mL) in sequence to deionized water (1L), heat up to 75°C after the dissolution is complete, and process it into 10mm×10mm×2mm AZ31B magnesium alloy samples of large and small sizes were placed in the alkaline cleaning solution and continuously stirred by ultrasonic waves, and were taken out after 15 minutes of treatment. At room temperature, put the treated AZ31B magnesium alloy into flowing deionized water for 2 minutes and take it out. The surface morphology of the treated samples is shown in figure 1 , the figure shows that a clean mechanically polished surface of AZ31B magnesium alloy is obtained after alkali washing.

[0033] 2) At room temperature, add 36% glacial acetic acid (40mL) and sodium nitrate (40g) in deionized water (1L) successively, put the AZ31B magnesium alloy after alkaline cleaning into the pickling solution and continue ultrasonic stirring to treat Take it out ...

Embodiment 2

[0049] 1) At room temperature, add sodium carbonate (20g), sodium phosphate (20g), OP-10 (10mL) in sequence to deionized water (1L), heat up to 60°C after the dissolution is complete, and put the AZ31B magnesium alloy sample into this Continue ultrasonic stirring in the alkaline cleaning solution, and take it out after 10 minutes of treatment. At room temperature, put the treated AZ31B magnesium alloy into flowing deionized water for 4 minutes and take it out.

[0050] 2) Pickling process is the same as in Example 1.

[0051] 3) At room temperature, add 40% hydrofluoric acid (240 mL) to deionized water (760 mL), put the AZ31B magnesium alloy treated above into the activation solution for 60 seconds, and then take it out. At room temperature, put the AZ31B magnesium alloy in flowing deionized water and wash it for 4 minutes before taking it out.

[0052] 3) At room temperature, add nickel acetate (38g) into deionized water (700mL) and wait for it to dissolve completely, then ...

Embodiment 3

[0064] 1) Alkaline cleaning process is the same as in Example 1.

[0065] 2) At room temperature, add 36% glacial acetic acid (35mL) and sodium nitrate (35g) to deionized water (1L) successively, put the treated AZ31B magnesium alloy into this solution and continue ultrasonic stirring, and take it out after 90s of treatment. Rinse with deionized water.

[0066] 3) The activation process is the same as in Example 1.

[0067] 3) At room temperature, add nickel acetate (40g) into deionized water (700mL) and wait until it is completely dissolved, then add ethylenediamine (55mL) while stirring, and add compound additives while stirring after cooling to room temperature, as follows: p-benzenesulfonate Sodium bicarbonate (8g), malonic acid (6g), sulfosalicylic acid (60mg), after the dissolution is complete, add sodium hydroxide (48g) under stirring, and after the dissolution is complete, add sodium borohydride (0.6g), Finally, add deionized water to 1L, heat to a constant temperatu...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The method relates the electron alloy surface chemical plating nickel-boron alloy. The invention provides the chemical plating Ni-B alloying layer technology form AZ31B electron alloys surface, which has low cost, simple operation and good environment. The method comprises the following steps: cleaning the electron alloy with alkali and supersonic wave and acid, and activating and poaching at 60-75Deg.C; putting it into chemical plating solution at 80-90Deg.C for 2-3 hours, taking it out, and poaching, getting Ni-B alloying layer; drying at 150-180Deg.C for 30-45 min. The technology has the advantages of low cost, simple operation, no chromic compounds, good aggradation effect, high hardness, good binding force and corrosion resisting property, and wide steering range.

Description

technical field [0001] The invention relates to a process for chemically plating Ni-B alloy on the surface of an AZ31B magnesium alloy. Background technique [0002] Magnesium alloy has the characteristics of light weight, high shock absorption and heat dissipation, good casting and cutting performance, high electromagnetic immunity barrier, anti-fatigue, non-toxic, non-magnetic, low crack tendency and recyclable use, etc., and has been successfully used in Transportation, computer, communication, consumer electronics, national defense and military industry and many other fields. However, the corrosion resistance of magnesium is poor, which is the bottleneck restricting the potential of magnesium alloys. On the other hand, due to the low hardness and poor wear resistance of magnesium alloys, the large-scale use of magnesium alloys is restricted. In order to improve the corrosion resistance and wear resistance of magnesium alloys, appropriate surface modification is necessa...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): C23C18/16C23C18/18C23C18/50C23G1/12C23G1/22
Inventor 王周成唐毅
Owner XIAMEN UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap