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

A Method for Evaluating Residual Life of Corrosion of Tower Metal Coating

A technology of metal coating and pole towers, which is applied in the fields of weather resistance/light resistance/corrosion resistance, measuring devices, instruments, etc., can solve problems such as poor accuracy and geographical restrictions, and achieve the effect of accurate evaluation results

Active Publication Date: 2018-05-08
ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID SHANDONG ELECTRIC POWER COMPANY +1
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a convenient, quick and accurate method for evaluating the remaining life of metal coatings in service, and to solve the problem that the evaluation of remaining life of corrosion of metal coatings of existing towers is limited by regions and has poor accuracy

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 Evaluating Residual Life of Corrosion of Tower Metal Coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Step 1: Collect data

[0021] In July 2013, the original data and operation and maintenance data of the evaluated tower (a 220kV tower) were collected. By analyzing the collected data, it is determined that the anti-corrosion coating of the pole tower is a galvanized layer, and the commissioning time is July 2007. As of July 2013, the actual running time of the coating is T 1 for 72 months.

[0022] Step 2: Determine the type of accelerated corrosion test according to the distance between the tower and the coastline

[0023] The tower to be evaluated is not located in the coastal area, and the distance from the coastline is greater than 5000 meters. Therefore, the multi-factor coupling accelerated corrosion test is selected to measure the corrosion failure results of the new metal coating sample of the same type as the metal coating of the in-service tower and the metal coating sample of the in-service tower. It takes time t 0 , t 1 . By collecting and analyzing m...

Embodiment 2

[0026] In July, 2015, to embodiment 1 on pole tower (coating actual running time T 1 96 months) re-sampled at the same location, and carried out multi-factor coupling accelerated corrosion test to measure the corrosion failure time t of the brand-new metal coating sample and the metal coating sample of the tower in service. 0 , t 1 . Experimental parameter settings are the same as in Example 1. The experimental results are: the accelerated corrosion test time t for the new coating sample to reach corrosion failure 0 is 1440 hours, the accelerated corrosion time t required for the corrosion failure of the metal coating sample of the in-service tower 1 for 480 hours. The corrosion failure means that according to GB / T 6461-2002, the corrosion grade reaches below 3 (including grade 3).

[0027] Calculate the remaining life T of the metal coating on the tower through the evaluation formula for the remaining life of the tower; ; The calculation result is T=48 months, that is,...

Embodiment 3

[0029] Step 1: Collect data

[0030] In June 2013, the original data and operation and maintenance data of the evaluated tower (a 220kV tower) were collected. By analyzing the collected data, it is determined that the anti-corrosion coating of the tower is a galvanized layer, and the commissioning time is June 2008, and the actual operation time of the coating is T 1 for 60 months.

[0031] Step 2: Determine the type of accelerated corrosion test according to the distance between the tower and the coastline

[0032] The tower to be evaluated is 2.5 kilometers away from the coastline, which is less than 5000 meters, so the neutral salt spray test is selected to measure the corrosion failure time t of the new metal coating sample and the metal coating sample of the tower in service. 0 , t 1 . The experimental parameters are set according to GB / T 10125 "Artificial Atmosphere Corrosion Test-Salt Spray Test". The experimental results are: the accelerated corrosion test time t ...

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 relates to a tower metal coating corrosion residual life assessment method and belongs to the technical field of tower metal coating safety monitoring and maintenance. The assessment method comprises acquiring an actual motion life limit T1 of an in-service tower metal coating, carrying out same-type accelerated corrosion tests on an in-service tower metal coating sample to be assessed and a novel metal coating sample belonging to the type of the in-service tower to obtain corrosion failure time t1 and t0 and calculating an in-service tower metal coating residual life T according to the formula shown in the description. Through accelerated corrosion tests respectively on the novel metal coating sample and the in-service tower metal coating sample and then comparison between corrosion failure time of the novel metal coating sample and the in-service tower metal coating sample, in-service tower metal coating residual life assessment is realized. Through use of the accelerated corrosion test, test time is greatly shortened and an assessment period is substantially reduced.

Description

technical field [0001] The invention relates to a method for evaluating the remaining corrosion life of a tower metal coating, belonging to the technical field of safety monitoring and maintenance of the metal coating of a tower. Background technique [0002] At present, the methods for evaluating the corrosion life of metal coatings mainly include: general value method, map method, modeling method, etc. Using these methods to evaluate the remaining life of corrosion of metal coatings requires a large amount of corrosion data accumulation, due to differences in regional environments and changes in the environment over time, the remaining life evaluation of metal coatings has low accuracy and is subject to geographical restrictions. question. Although the on-site exposure test is effective for evaluating the corrosion life of materials, the period is too long. Contents of the invention [0003] The purpose of the present invention is to provide a convenient, quick and acc...

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): G01N17/00
CPCG01N17/00
Inventor 李辛庚闫风洁岳增武李华东许乃媛王学刚王晓明樊志彬郭凯
Owner ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID SHANDONG ELECTRIC POWER COMPANY
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