Method for rapidly evaluating performance of weather-resistant steel rust layer for transmission tower in coastal atmospheric environment

A technology for atmospheric environment and power transmission towers, applied in the fields of weather resistance/light resistance/corrosion resistance, preparation of test samples, instruments, etc., it can solve the problems of not reflecting the performance of the rust layer, long test period, etc., to shorten the measurement and evaluation time, The effect of shortening the evaluation cycle and cheap equipment

Active Publication Date: 2021-02-23
STATE GRID FUJIAN ELECTRIC POWER CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this method is that the test period is long: according to TB / T2375, the "periodic immersion test + weight loss method" is adopted, the test period can be agreed to be 50, 75, and 100 hours, and the test material is a bare material without surface stabilization treatment, 100 hours The weekly immersion test reflects the generation speed of the rust layer on the weathering steel surface, but does not reflect the performance of the rust layer during long-term service. The performance of the rust layer during long-term service requires a longer test

Method used

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  • Method for rapidly evaluating performance of weather-resistant steel rust layer for transmission tower in coastal atmospheric environment
  • Method for rapidly evaluating performance of weather-resistant steel rust layer for transmission tower in coastal atmospheric environment
  • Method for rapidly evaluating performance of weather-resistant steel rust layer for transmission tower in coastal atmospheric environment

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Effect test

Embodiment 1

[0046] The weathering steel samples (the sample is Q420NTH) with the same chemical composition and three different stabilization processes, respectively A sample, B sample, and C sample, are evaluated by this patent method, and the test data are recorded in Table 1. ;

[0047] Table 1: Comparison table of test results of three different weathering steel samples with the same chemical composition and different stabilization treatments

[0048]

[0049] Through this method, the service performance of sample A and sample B is better in the coastal atmospheric environment, and the performance of sample C is poor.

[0050] Comparing the weight loss test results of 3 kinds of samples hanging on the spot for 1 year, the results are consistent, so it can be inferred that the evaluation method of the present invention is consistent with the results of the field hanging sample test with the most accurate test results, and can effectively shorten the evaluation cycle.

Embodiment 2

[0052] Three kinds of weathering steel samples (the sample is Q420NTH) with different chemical compositions in the same stabilization treatment process, respectively A sample, B sample, and C sample, were evaluated by this patent method, and the test data were recorded in Table 2. ;

[0053]Table 2: Comparison table of test results of three different weathering steel samples with the same stabilization treatment process and different chemical compositions

[0054]

[0055] Through this method, the service performance of sample A and sample B is better in the coastal atmospheric environment, and the local corrosion problem of sample C is serious

[0056] Comparing the weight loss test results of 3 kinds of samples hanging on the spot for 1 year, the results are consistent, so it can be inferred that the evaluation method of the present invention is consistent with the results of the field hanging sample test with the most accurate test results, and can effectively shorten th...

Embodiment 3

[0058] The weathering steel samples (sample is Q420NTH) of 3 different manufacturers with the same stabilization treatment process, respectively A sample, B sample, and C sample, are evaluated by this patent method, and the test data are recorded in Table 3. ;

[0059] Table 3: Comparison table of test results of three different weathering steel samples from different manufacturers with the same stabilization treatment process

[0060]

[0061]

[0062] By this method, the properties of the three samples are close.

[0063] Comparing the weight loss test results of 3 kinds of samples hanging on the spot for 1 year, the results are consistent, so it can be inferred that the evaluation method of the present invention is consistent with the results of the field hanging sample test with the most accurate test results, and can effectively shorten the evaluation period.

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Abstract

The invention discloses a method for quickly evaluating the performance of a weather-resistant steel rust layer for a power transmission tower in a coastal atmospheric environment and belongs to the technical field of performance evaluation of the weather-resistant steel rust layer. According to the method, a corrosion simulation test is performed according to the service characteristics of a simulated coastal atmospheric corrosion environment; with the local corrosion of weather-resistant steel under the coastal atmospheric corrosion environment mainly applied, local corrosion general situation D2 and comprehensive corrosion general situation D1 are compared with each other, so that an evaluation basis index K value can be obtained; the corrosion tendency of a material is judged through local corrosion tendency observation; and therefore the measurement and evaluation time can be greatly shortened. Compared with an original weightlessness method which reflects comprehensive corrosion,the method of the invention enables a user to observe corrosion depth and the reflects the problem of local corrosion; the comprehensive corrosion measurement of the weightlessness method needs at least more than 10 days, while the method of the invention can be used for effectively shortening the evaluation period to be 2 or 4 days, and has the advantages of cheap equipment, simple operation andpopularization significance.

Description

technical field [0001] The invention relates to the technical field of performance evaluation of weather-resistant steel rust layers, in particular to a method for quickly evaluating the performance of weather-resistant steel rust layers for power transmission towers in coastal atmospheric environments. Background technique [0002] Power transmission towers are often protected by hot-dip galvanizing. Hot-dip galvanizing requires special rust removal, pickling, and galvanizing processes, which requires a large investment and serious pollution. Usually, the zinc liquid needs to be heated to about 450°C, which will release harmful gas and endanger human health, especially Cr in the galvanizing passivation solution. 6+ It is very harmful to the human body and the environment, and is very unfavorable to environmental protection. Cr 6+ Pollution control has become a worldwide problem, and has been restricted by the environmental protection department. [0003] Weathering steel ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N17/00G01N1/28
CPCG01N17/006G01N1/28
Inventor 陈云翔洪毅成林德源蔡建宾韩纪层严康骅夏晓健万芯瑗黄伟林
Owner STATE GRID FUJIAN ELECTRIC POWER CO LTD
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