Method of accelerated corrosion test used for simulating corrosion process of copper and alloy thereof in atmosphere

An accelerated corrosion test, atmospheric corrosion technology, applied in the direction of weather resistance/light resistance/corrosion resistance, measuring devices, instruments, etc., can solve the problems of difficult operation, many control factors, etc. analog effect

Inactive Publication Date: 2012-05-23
GENERAL RESEARCH INSTITUTE FOR NONFERROUS METALS BEIJNG
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this type of method is that there are many factors to be controlled and the operation is difficult

Method used

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  • Method of accelerated corrosion test used for simulating corrosion process of copper and alloy thereof in atmosphere
  • Method of accelerated corrosion test used for simulating corrosion process of copper and alloy thereof in atmosphere
  • Method of accelerated corrosion test used for simulating corrosion process of copper and alloy thereof in atmosphere

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] The test materials are the above-mentioned T2, H62, QBe2. With 0.2mol / L CuCl 2 +0.05mol / L(NH 4 ) 2 SO 4 +0.01mol / L NaHSO 3 For the dipping solution, cycle according to the order of "dipping→wetting→drying→", in which dipping is at 50°C, wetting is at 50°C, and drying is at 70°C; the cycle time refers to the following conditions: cycle once every 180 minutes, including dipping for 15 minutes; wet for 105 minutes; dry 60 minutes; total experiment time is 24 hours, 48 ​​hours, 72 hours, 96 hours or 120 hours. In order to simulate the atmospheric corrosion process of the three materials, the corrosion weight loss and test time are listed in Table 4, and the relationship curve between corrosion weight loss and test time is shown in figure 2 , the regression analysis of corrosion weight loss and accelerated test time is shown in Table 5. Among the three kinds of copper and its alloys, T2 has the largest corrosion weight loss, followed by QBe2, and the smallest is H62; t...

Embodiment 2

[0054] The test materials are the above-mentioned T2, H62, QBe2. With 0.01mol / L CuCl 2 +3mol / L(NH 4 ) 2 SO 4 +0.2mol / L NaHSO 3 For the dipping solution, cycle according to the order of "dipping→wetting→drying→", in which dipping is at 25°C, wetting is at 25°C, and drying is at 40°C; the cycle time refers to the following conditions: cycle once every 150 minutes, including dipping for 10 minutes; wet for 110 minutes; dry 30 minutes; total experiment time is 24 hours, 48 ​​hours, 72 hours, 96 hours or 120 hours. This is used to simulate the atmospheric corrosion process of the three materials. The corrosion weight loss and test time are listed in Table 6. The relationship curve between corrosion weight loss and test time is shown in image 3 , the regression analysis of corrosion weight loss and accelerated test time is shown in Table 7. Among the three kinds of copper and its alloys, T2 has the largest corrosion weight loss, followed by QBe2, and the smallest is H62; the c...

Embodiment 3

[0060] The test materials are the above-mentioned T2, H62, QBe2. With 0.07mol / L CuCl 2 +2mol / L(NH 4 ) 2 SO 4 +0.1mol / L NaHSO 3 For the dipping solution, cycle according to the order of "dipping→wetting→drying→", in which dipping is at 25°C, wetting is at 25°C, and drying is at 50°C; the cycle time refers to the following conditions: cycle once every 60 minutes, including dipping for 5 minutes; wet for 35 minutes; dry 20 minutes; total experiment time is 24 hours, 48 ​​hours, 72 hours, 96 hours or 120 hours. This is used to simulate the atmospheric corrosion process of the three materials. The corrosion weight loss and test time are listed in Table 8. The relationship curve between corrosion weight loss and test time is shown in Figure 4 , the regression analysis of corrosion weight loss and accelerated test time is shown in Table 9. Among the three copper and its alloys, T2 has the largest corrosion weight loss, followed by QBe2, and the smallest is H62; the corrosion la...

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Abstract

The invention relates to a method of an accelerated corrosion test used for simulating a corrosion process of copper and alloy thereof in the atmosphere. The method comprises steps that: (1) copper or copper alloy is prepared into a test sample; (2) an aqueous solution of CuCl2, (NH4)2SO4 and NaHSO3 is adopted as an impregnation solution; (3) the sample is subject to a circulated test according to a sequence of impregnating, moisturizing, and drying; and single-time and total test times are determined according to specific requirements; (4) the sample obtained from the step (3) is treated, and researches such as corrosion weight loss, corrosion products and morphological analysis are carried out. The method provided by the invention is used for simulating the corrosion process of copper and alloy thereof in different environments such as a damp and hot environment and a marine environment. The test method has a simulating capacity, an accelerating capacity, and repeatability. The method can be used in the researches of atmosphere corrosion behaviors and rules of copper and alloy thereof in different environments, and can be used in rapid evaluations of corrosion resistances of various copper and alloy thereof.

Description

technical field [0001] The invention relates to an accelerated corrosion test method for simulating the atmospheric corrosion process of copper and its alloys, and belongs to the simulation technical field of atmospheric corrosion of copper and its alloys. Background technique [0002] The atmospheric corrosion of materials in the natural environment is an important basis for engineering design and anti-corrosion construction. The exposure test method in the natural environment is usually used to understand the atmospheric corrosion of materials. However, the atmospheric exposure test period is very long, often as long as several years or even longer, and the test is highly regional. People hope that the laboratory accelerated corrosion test can be used to infer the results of outdoor long-term exposure tests, and then predict materials, products, and protective layers. Atmospheric corrosion life, to partially replace the atmospheric corrosion exposure test; on the other han...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N17/00
Inventor 温军国郑弃非赵月红
Owner GENERAL RESEARCH INSTITUTE FOR NONFERROUS METALS BEIJNG
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