Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method capable of improving corrosion resistance of nickel-aluminium bronze

A nickel-aluminum bronze, corrosion-resistant technology, applied in ion implantation plating, coating, metal material coating process, etc., to achieve the effect of improving corrosion resistance, inhibiting phase-selective corrosion, and having obvious modification effects

Inactive Publication Date: 2017-05-17
SHANGHAI JIAO TONG UNIV
View PDF3 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The present invention adopts ion implantation technology to form rich Cr corrosion-resistant layer on the surface of nickel-aluminum bronze to improve the method for the corrosion-resistant performance of material, also does not report at present

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 capable of improving corrosion resistance of nickel-aluminium bronze
  • Method capable of improving corrosion resistance of nickel-aluminium bronze
  • Method capable of improving corrosion resistance of nickel-aluminium bronze

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] This example relates to a method for ion implantation to improve the corrosion resistance of nickel-aluminum bronze, said method comprising the steps of:

[0027] Step 1: Mechanically polish the surface of the as-cast nickel-aluminum bronze with 400#—800#—1200#—2000# water sandpaper in sequence, and then polish it to a mirror surface with 0.5 μm diamond abrasive paste. Put the sample in the alcohol solution for ultrasonication for 15 minutes, then rinse it with deionized water, and dry it with cold air for later use;

[0028] Step 2: Place the treated nickel-aluminum bronze sample in the vacuum chamber of the ion implanter, implant Cr ions into the surface of the sample with a voltage of 40kV and a beam current of 1mA, and the implantation dose is 1×10 16 ion / cm 2 .

Embodiment 2

[0030] This example relates to a method for ion implantation to improve the corrosion resistance of nickel-aluminum bronze, said method comprising the steps of:

[0031] Step 1: Mechanically polish the surface of the as-cast nickel-aluminum bronze with 400#—800#—1200#—2000# water sandpaper in sequence, and then polish it to a mirror surface with 0.5 μm diamond abrasive paste. Put the sample in the alcohol solution for ultrasonication for 15 minutes, then rinse it with deionized water, and dry it with cold air for later use;

[0032] Step 2: Place the treated nickel-aluminum bronze sample in the vacuum chamber of the ion implanter, implant Cr ions into the surface of the sample with a voltage of 30kV and a beam current of 2mA, and the implantation dose is 5×10 17 ion / cm 2 .

[0033] Example 2 provides test data on the distribution of elements inside the surface-modified corrosion-resistant layer. Using Auger electron spectroscopy to analyze the depth of the corrosion resista...

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 invention provides a method capable of improving the corrosion resistance of nickel-aluminium bronze. The method comprises the following steps: carrying out surface polishing on the nickel-aluminium bronze, then cleaning, and carrying out ion implantation at a voltage of 30-40kV and a current of 1-2mA to form a corrosion-resistant layer on the surface of the nickel-aluminium bronze. Compared with the prior art, the method has the following beneficial effects: 1. a modification effect is obvious, and the phase-selection corrosion of the nickel-aluminium bronze can be effectively suppressed; 2. the surface material of the nickel-aluminium bronze is directly modified, the corrosion-resistant layer on the surface is combined with a matrix alloy by virtue of a chemical bond, and the problem of a bonding force has no need to be considered; 3. the types and contents of the implanted metal ions can be accurately controlled to realize regulation and control on the components and thickness of the corrosion-resistant layer; 4. high temperature is not needed during the ion implantation process, and the phase change of the internal structure of the nickel-aluminium bronze is avoided, so that the mechanical property is not sacrificed while the corrosion resistance is improved; and 5. the deformation of a workpiece and the change of the dimensions are avoided.

Description

technical field [0001] The invention relates to a method for improving the corrosion resistance of nickel-aluminum bronze, which belongs to the technical field of surface treatment. Background technique [0002] Nickel-aluminum-bronze (NAB) alloys are widely used in marine environments, such as seawater pipelines, ship valves, and offshore drilling platform equipment, because of their good corrosion resistance and high mechanical properties. The microstructure of as-cast nickel-aluminum bronze is relatively complex, mainly including coarse copper-rich α phase, retained martensite β′ phase and intermetallic compound κ phase (κⅠ, κⅡ, κⅢ, κⅣ). Due to the difference in chemical composition and structure of each phase, the corrosion behavior of each phase is different, resulting in the occurrence of phase selective corrosion. The study found that in the neutral corrosive medium, the β′ phase and the α phase in the eutectoid structure α+κⅢ are the first to corrode, leading to the...

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): C23C14/48C23C14/16C22C9/01
CPCC22C9/01C23C14/16C23C14/48
Inventor 吴忠秦真波刘磊罗芹沈彬张琪刘德荣胡文彬
Owner SHANGHAI JIAO TONG UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com