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

An atmospheric environment, transmission tower technology, applied in weather resistance/light resistance/corrosion resistance, preparation of test samples, measurement devices, etc.

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

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Problems solved by technology

The disadvantage of using it is that the test period is long: according to TB / T 2375, 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 power transmission tower in industrial atmospheric environment
  • Method for rapidly evaluating performance of weather-resistant steel rust layer for power transmission tower in industrial atmospheric environment
  • Method for rapidly evaluating performance of weather-resistant steel rust layer for power transmission tower in industrial atmospheric environment

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The weathering steel samples (sample is Q420NTH) with the same chemical composition and three different stabilizing processes, which are respectively A sample, B sample, and C sample, are evaluated by this patent method, and the data are obtained to draw a line graph, and Compared with the test results of the same sample hanging for one year in the industrial atmospheric environment, the comparison results are shown in Table 1 below, where the one-year corrosion rate of the on-site hanging sample in the corrosion rate table is measured by the weight loss method;

[0033] Table 1: Comparison table of test results of three different weathering steel samples with the same chemical composition and different stabilization treatments

[0034]

[0035] Through this method, the corrosion resistance of the three tests is close; thus it can be inferred that the test method and evaluation method of the present invention are consistent with the results of the real corrosion weigh...

Embodiment 2

[0037] Three kinds of weathering steel samples (the sample is Q420NTH) with different chemical compositions in the same stabilization treatment process, which are respectively A sample, B sample, and C sample, are evaluated by this patent method, and the data are drawn to draw a line graph, and Compared with the test results of the same sample hanging for one year in the industrial atmospheric environment, the comparison results are shown in Table 2 below, where the corrosion rate of the on-site hanging sample for one year in the corrosion rate table is measured by the weight loss method;

[0038] Table 2: Comparison table of test results of three different weathering steel samples with the same stabilization treatment process and different chemical compositions

[0039]

[0040] By this method, the performance of sample A is the worst; thus it can be inferred that the test method and evaluation method of the present invention are consistent with the real corrosion weight lo...

Embodiment 3

[0042] 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 data obtained are drawn as line graphs, and compared with The test results of the same sample hanging for one year in the industrial atmospheric environment are compared, and the comparison results are shown in Table 3 below, where the corrosion rate of the one-year hanging sample in the corrosion rate table is measured by the weight loss method;

[0043] Table 3: Comparison table of test results of three different weathering steel samples with the same stabilization treatment process and different chemical compositions

[0044]

[0045]

[0046] By this method, the performance of the sample A sample is better, and the performance of the sample C is relatively poor; thus it can be inferred that the test method and evaluation method of the present inventi...

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Abstract

The invention discloses a method for rapidly evaluating the performance of a weather-resistant steel rust layer for a power transmission tower in an industrial atmospheric environment, and belongs tothe technical field of performance evaluation of the weather-resistant steel rust layer. According to the method, NaCl with the concentration of 0.5% is added into a traditional simulated corrosion solution according to the service characteristics of a simulated industrial atmospheric corrosion environment, so that the corrosion rate is increased, and a corrosion mechanism is not changed; a brokenline graph is drawn by using multiple groups of sample data, inflection point coordinates are taken as corrosion resistance evaluation values, so that the durability of weather-resistant steel in theindustrial atmospheric environment is effectively evaluated; test results show that a soaking test and a week soaking test in the industrial environment show similar rules, the corrosion rate can beincreased by the soaking test, the test period is effectively shortened, and equipment is cheap, operation is easy, and popularization significance is achieved.

Description

technical field [0001] The invention relates to the technical field of performance evaluation of a weather-resistant steel rust layer, in particular to a method for quickly evaluating the performance of a weather-resistant steel rust layer for power transmission towers in an industrial atmospheric environment. 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...

Claims

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Application Information

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IPC IPC(8): G01N17/00G01N1/28
CPCG01N17/006G01N1/28
Inventor 陈云翔夏晓健万芯瑗林德源洪毅成蔡建宾韩纪层严康骅黄伟林
Owner STATE GRID FUJIAN ELECTRIC POWER CO LTD
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