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

A Method for Coating Aging Failure Evaluation in Atmospheric Thin Liquid Film Environment

An evaluation method, thin liquid film technology, applied in the direction of weather resistance/light resistance/corrosion resistance, instruments, measuring devices, etc.

Active Publication Date: 2020-12-29
CHINA SPECIAL TYPE FLIER RES INST
View PDF11 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for the aircraft to serve in the actual environment system, considering the operational complexity of the above test techniques or the environmental limitations of monitoring, the monitoring and evaluation of coating aging can only be carried out in the laboratory environment, so a method that can be applied to the service environment is required. Coating aging monitor, and can monitor coating aging in atmospheric environment, and can quickly evaluate coating performance

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
  • A Method for Coating Aging Failure Evaluation in Atmospheric Thin Liquid Film Environment
  • A Method for Coating Aging Failure Evaluation in Atmospheric Thin Liquid Film Environment
  • A Method for Coating Aging Failure Evaluation in Atmospheric Thin Liquid Film Environment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] In this case, the experimental verification is carried out according to the above probe design: using the above evaluation method, the prepared polyurethane coating PU, fluorine polyurethane coating F-PU, and acrylic polyurethane coating A-PU test samples are placed in the salt spray aging box, The neutral salt spray accelerated aging test of the coating is carried out. The test process uses a neutral NaCl solution with a pH of 7 and a mass fraction of 5.0% at 35°C. It uses intermittent spraying, 60min spraying, 60min intermittent, and the monitoring probe is connected to the detector. Impedance test. From Figure 5 From the EIS spectrum of the sensor test, the impedance of the three organic coatings in the early stage of aging is relatively large, all above 109Ohm·cm2, and the coating has a strong protective performance. With the extension of the salt spray acceleration time, the Nyquist arc of the coating gradually decreases. The impedance decreases 384h before the s...

Embodiment 2

[0040] This case is tested and verified according to the traditional three-electrode system soaked in electrolyte: Figure 6 It is the EIS spectrum of the coating tested by the traditional three-electrode system soaked in electrolyte in the laboratory, and Figure 5 The comparison of the coating impedance attenuation process of the medium probe test can be obtained. During the failure process of the three different organic coatings, in the first 384 hours, a large semi-circle arc appeared in the Nyquist spectrum, and the Bode The impedance in the low-frequency region in the figure is reduced to 106Ohm cm2. In order to further investigate the performance of the sensor in the test coating aging system, the Figure 6 The equivalent circuit in the medium is fitted to the EIS spectrum, and the curves of the resistance RCMS and capacitance CCMS of the coating / metal system obtained by the two methods are compared with the salt spray time: using Figure 6 (a) When fitting: RCMS=RC, C...

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 belongs to the technical field of studies of aging failure of a coating under an atmospheric thin liquid film environment, and relates to a method for evaluating the aging failure of thecoating under the atmospheric thin liquid film environment. A 32-bit ARM and a high-speed ADDA converter are adopted to develop a low-power 8-channel coating aging on-line monitoring instrument, which is mainly used for measuring the protection performance of the aircraft coating to realize multiple measuring methods such as open circuit potential, constant potential polarization and AC impedancespectroscopy. In order to measure the aging state of the coating exposed to the atmospheric environment, a three-electrode impedance monitoring probe based on the same material is developed to achieve the online testing of the aging state of the coating in the atmosphere.

Description

technical field [0001] The invention belongs to the technical field of coating aging failure research under atmospheric thin liquid film environment, and relates to a coating aging failure evaluation method under atmospheric thin liquid film environment. Background technique [0002] Aircraft are usually subjected to harsh external conditions during their service, mainly including ultraviolet radiation, salt spray erosion, high and low temperature and alternating dry and wet weather aging, resulting in a decline in the protective performance of the coating on the surface of the aircraft, resulting in chalking, embrittlement, and adhesion Decrease in gloss, decrease in gloss, blistering, etc., will age the coating and cause corrosion of the base metal of the coating, thereby affecting the overall performance of the aircraft, reducing the service life of the aircraft or causing aircraft safety failures. Therefore, monitoring the performance of aircraft surface coatings, propos...

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
Patent Type & Authority Patents(China)
IPC IPC(8): G01N17/02G01N17/00G01N17/04
CPCG01N17/002G01N17/02G01N17/04
Inventor 金涛张登何卫平刘成臣董泽华张幸朱丽敏王浩伟廖圣智
Owner CHINA SPECIAL TYPE FLIER RES INST
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