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Accelerated test method for corrosion resistance of transformer shell coating

A test method and corrosion resistance technology, applied in the field of accelerated corrosion resistance test of transformer shell coatings, can solve problems such as failure to meet the designed service life and failure to reflect the coupling effect of transformers

Pending Publication Date: 2022-07-29
GLOBAL ENERGY INTERCONNECTION RES INST CO LTD +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Therefore, the technical problem to be solved by the present invention is to overcome the existing test method that can only reflect the corrosion resistance of the anti-corrosion coating in a single environment, and cannot reflect the coupling effect of various corrosion factors in the environment where the transformer is located. Defects that cannot meet the design service life in actual use, so as to provide an accelerated test method for the corrosion resistance of transformer shell coatings

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] This embodiment provides an accelerated test method for the corrosion resistance of a transformer shell coating,

[0043] A common anti-corrosion coating for transformers was selected, and an anti-corrosion coating was prepared on the surface of the carbon steel sample with a dry film thickness of 150 μm. The corrosion resistance of this anti-corrosion system coating was evaluated by the accelerated corrosion test method, and the three-stage cycle test of A, B and C was carried out for 30 cycles.

[0044] Stage A: 8h xenon lamp, simulating the aging corrosion environment of the coating by sunlight, using xenon lamp continuous illumination, the irradiation intensity is 0.6W / m at 340nm 2 , the temperature is 45℃, and the humidity is 45RH%.

[0045] Stage B: The temperature of the dry environment is 50°C and the humidity is 50RH%; the acid salt solution is used to simulate the wetting environment of the corrosive medium solution. The acid salt solution includes: NaHSO wit...

Embodiment 2

[0055] This embodiment provides an accelerated test method for the corrosion resistance of a transformer shell coating,

[0056] Select a common anti-corrosion coating B for transformers, and prepare an anti-corrosion coating on the surface of the carbon steel sample with a dry film thickness of 150 μm. The corrosion resistance of this anti-corrosion system coating was evaluated by the accelerated corrosion test method, and the three-stage cycle test of A, B and C was carried out for 30 cycles.

[0057] Stage A: 8h xenon lamp, simulating the aging corrosion environment of the coating by sunlight, using xenon lamp continuous illumination, the irradiation intensity is 0.6W / m at 340nm 2 , the temperature is 45℃, and the humidity is 45RH%.

[0058] Stage B: The temperature of the dry environment is 50°C and the humidity is 50RH%; the acid salt solution is used to simulate the wetting environment of the corrosive medium solution. The acid salt solution includes: NaHSO with a conce...

Embodiment 3

[0064] This embodiment provides an accelerated test method for the corrosion resistance of a transformer shell coating,

[0065] Select a common anti-corrosion coating C for transformers, and prepare an anti-corrosion coating on the surface of the carbon steel sample with a dry film thickness of 150 μm. The corrosion resistance of this anti-corrosion system coating was evaluated by the accelerated corrosion test method, and the three-stage cycle test of A, B and C was carried out for 30 cycles.

[0066] Stage A: 8h xenon lamp, simulating the aging corrosion environment of the coating by sunlight, using xenon lamp continuous illumination, the irradiation intensity is 0.6W / m at 340nm 2 , the temperature is 45℃, and the humidity is 45RH%.

[0067] Stage B: The temperature of the dry environment is 50°C and the humidity is 50RH%; the acid salt solution is used to simulate the wetting environment of the corrosive medium solution. The acid salt solution includes: NaHSO with a conce...

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Abstract

The invention belongs to the technical field of coating corrosion resistance testing, and particularly relates to an accelerated testing method for the corrosion resistance of a transformer shell coating. The invention provides an accelerated test method for corrosion resistance of a coating of a transformer shell, which comprises the following steps: prefabricating an anticorrosive coating, and performing a cyclic test for 25-30 cycles at three stages of A, B and C; wherein in the stage A, illumination is conducted for 6-10 h under a xenon lamp; in the stage B, alternate wetting and drying treatment is performed for 8-24 hours; in the stage C, transformer oil is adopted for wetting, and standing is conducted for 1-4 h at the temperature of 70-80 DEG C; and after the cycle test is finished, the corrosion resistance index of the coating is tested. According to the test method provided by the invention, the service environment characteristics of the anticorrosive coating of the transformer shell are simulated in the aspects of illumination, high temperature, dry-wet alternation time ratio, oil immersion and the like, and the accelerated test of the corrosion resistance of the anticorrosive coating of the transformer shell is realized. According to the test result of the corrosion resistance index, the problem that the designed service life cannot be met in the actual use process is solved.

Description

technical field [0001] The invention belongs to the technical field of coating corrosion resistance testing, and particularly relates to an accelerated testing method for the corrosion resistance of a transformer shell coating. Background technique [0002] Anti-corrosion coatings are widely used to protect substrates, and the performance requirements of coatings are different in different application environments. The application environment is determined by the type of substrate, atmospheric environment, service equipment and other characteristics. As an important part of the power transmission network, the working environment of the transformer is changeable, from the industrial atmospheric environment to the humid and hot marine atmospheric environment near the sea. At the same time, the transformer is at a high temperature for a long time during the operation process, which has a great effect on the performance of the anti-corrosion coating of the transformer shell. hi...

Claims

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Application Information

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IPC IPC(8): G01N17/00
CPCG01N17/00
Inventor 陈云杨丙坤郝文魁王晓芳周海飞莫娟易盼
Owner GLOBAL ENERGY INTERCONNECTION RES INST CO LTD