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

Preparation method of seawater corrosion resistant wear-resistant composite coating

A composite coating, corrosion and wear technology, applied in the direction of coating, metal material coating process, fusion spray plating, etc., can solve the problems of reliability, safety and service life of mechanical parts, and achieve improved bonding strength, excellent The effect of corrosion and wear resistance

Active Publication Date: 2019-01-04
XI AN JIAOTONG UNIV +1
View PDF5 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the seawater environment, the synergistic effect of corrosion and wear will greatly reduce the reliability, safety and service life of mechanical components of marine equipment

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
  • Preparation method of seawater corrosion resistant wear-resistant composite coating
  • Preparation method of seawater corrosion resistant wear-resistant composite coating
  • Preparation method of seawater corrosion resistant wear-resistant composite coating

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0032] A seawater corrosion and wear resistant NiAl-Cr of the present invention 2 o 3 -The preparation method of Mo composite coating, by adding Cr 2 o 3 and Mo, the microhardness of the composite coating increased from 195.1HV to 362.3HV, the friction coefficient in seawater environment decreased from 0.29 to 0.26, and the wear rate decreased from 3.2×10 -5 mm 3 / N.m reduced to 2.7×10 -5 mm 3 / N.m, the corrosion and wear performance of the coating in the seawater environment is significantly improved, and the composite coating shows excellent comprehensive performance; the specific steps are as follows:

[0033] S1, mixed powder

[0034] In terms of mass fraction, NiAl is 60-75%, Cr 2 o 3 Mo is 15-25%, Mo is 10-15%, and the powder is mixed evenly on a three-dimensional powder mixer;

[0035] S2, grinding the surface of the base sample;

[0036]Grind the cut base sample on coarse sandpaper to remove the remaining oil stains on the surface of the base sample; select I...

Embodiment 1

[0048] The spraying tests were carried out using the laboratory's SulZer Metco 9M plasma spraying apparatus. Firstly, in terms of mass fraction, NiAl is 60-75%, Cr 2 o 3 15% to 25% Mo, 10% to 15% Mo, mix the weighed powder evenly on a three-dimensional powder mixer, and dry the evenly mixed spray powder in a vacuum drying oven to ensure smooth powder delivery during the spraying process , and then sandblasting and cleaning the base material to remove oil stains and sand remaining on the base surface. Before spraying, the substrate material should be preheated to reduce the temperature difference between the molten particles and the substrate surface, so that it can better adhere to the substrate surface, thereby improving the bonding strength of the coating. After the substrate sample is preheated to 300 At ~500°C, carry out the spraying test. The spraying parameters during the test are Ar flow rate 38-45L / min, H 2 The flow rate is 4.5-6L / min, the spraying angle is 80-100°...

Embodiment 2

[0050] The coating prepared in Example 1 was cut into a corrosion wear test sample, the sample size was 20mm × 20mm × 1.5mm, the corrosion solution was artificial seawater, and the artificial seawater was proportioned according to the ASTMD114-98 standard, with 0.1M NaOH solution Adjust the pH value of the artificial seawater to 8.2. Before the test, the sample was soaked in the solution tank for 0.5 hours, and then the corrosion and wear test was carried out on the corrosion and wear testing machine. The friction speed is 0.8mm / s, the force is 5N, the reciprocating friction test range is 3.5mm, and the friction test is 1 hour. Measured by adding Cr 2 o 3 and Mo, the friction coefficient of the coating decreased from 0.29 to 0.26, and the wear rate decreased from 3.2×10 -5 mm 3 / N.m reduced to 2.7×10 -5 mm 3 / N.m, the corrosion resistance and wear resistance are significantly enhanced, such as Figure 4 , 5 shown.

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

PropertyMeasurementUnit
Microhardnessaaaaaaaaaa
Thicknessaaaaaaaaaa
Thicknessaaaaaaaaaa
Login to View More

Abstract

The invention discloses a preparation method of seawater corrosion resistant wear-resistant composite coating. The preparation method includes: subjecting a base sample to sand blasting before washing, preheating the base sample, preparing NiAl-Cr2O3-Mo composite coating on the surface of a base by means of plasma spraying, and spraying a NiAl binding layer between the NiAl-Cr2O3-Mo composite coating and the base; the NiAl binding and the NiAl-Cr2O3-Mo composite coating can bind well, so that binding strength of the composite coating herein can be effectively improved. After Cr2O3 and Mo are added, microhardness of the composite coating herein can be increased from 195.1 HV to 362.3 HV, friction coefficient in seawater is decreased from 0.29 to 0.26, and wear rate is decreased from 3.2*10<-5> mm<3> / N. m to 2.7*10<-5> mm<3> / N. m. The composite coating herein has excellent comprehensive performance.

Description

technical field [0001] The invention belongs to the technical field of coating materials, and in particular relates to a seawater corrosion-resistant NiAl-Cr 2 o 3 -The preparation method of Mo composite coating. Background technique [0002] At present, with the rapid development of science and technology, the consumption of land resources is increasing rapidly, and the research and utilization of marine resources have attracted extensive attention of researchers. However, marine equipment is immersed in seawater for a long time, and it is corroded by seawater and sometimes wears to a certain extent. Therefore, it is necessary to improve the corrosion and wear resistance of marine equipment to meet the continuous development of marine engineering. The synergy between corrosion and wear of materials is complex and usually involves the interaction between physical, mechanical, chemical and electrochemical aspects of materials. Corrosion alters the hardness, roughness, and...

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): C23C4/134C23C4/06
CPCC23C4/06C23C4/134
Inventor 李博高义民李聪郑巧玲李烨飞刘志伟郑开宏王娟
Owner XI AN JIAOTONG 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