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Corrosion test method for simulating truck body steel in coal leachate medium

A corrosion test, leachate technology, applied in the direction of weather resistance/light resistance/corrosion resistance, measuring devices, instruments, etc., can solve the problem of no accelerated test method of coal leachate, and achieve the effect of good reproducibility

Inactive Publication Date: 2019-08-06
UNIV OF SCI & TECH BEIJING
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, there are many accelerated corrosion tests on carbon steel and weathering steel in various atmospheric environments, but there are almost no accelerated test methods in coal leachate.

Method used

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  • Corrosion test method for simulating truck body steel in coal leachate medium
  • Corrosion test method for simulating truck body steel in coal leachate medium
  • Corrosion test method for simulating truck body steel in coal leachate medium

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Embodiment Construction

[0019] The invention provides a method for simulating the corrosion test of the steel used for the truck body in the coal leaching liquid medium, which can satisfy three basic conditions of simulation, acceleration and reproducibility.

[0020] The following will be described in conjunction with specific embodiments.

[0021] The method steps are:

[0022] (1) The weathering steel S450AW is used as the test material. The chemical composition is shown in Table 1. The wire cutting size of the sample used in the accelerated corrosion test is 150mm (length) × 75mm (width) × 4mm (thickness). The cut samples were polished with 150#, 240#, 400#, 800# sandpaper in turn, degreased with acetone, rinsed with deionized water, dehydrated with ethanol solution, dried with a hair dryer, and then stored in a desiccator. Before the test, the size of the sample was measured with a vernier caliper, and the initial weight was weighed with a balance with an accuracy of 0.1 mg.

[0023] Table 1 C...

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Abstract

The invention provides a corrosion test method for simulating truck body steel in a coal leachate medium and belongs to the metal corrosion atmospheric simulation technology field. Truck body steel istaken as a test material, a mixed solution which contains, by weight, 3.5% of NaCl, 0.25% of MgCl2, 1% of CaCl2, 0.25% of KCl and 10% of Na2SO4 is taken as a dipping solution, and a pH value is 3. Asample is subjected to a dry and wet alternating test in an order of ''infiltration-drying-hot and humid condition'' in a periodic infiltration testing machine, and a cycle is repeated every 60 minutes, where the sample is infiltrated for 15 minutes and dried for 15 minutes; and the hot and humid condition maintains for 30 minutes, a temperature of the dipping solution is (40+ / -5)DEG C, a drying temperature is (70+ / -5)DEG C, and a hot and humid temperature is (40+ / - 5)DEG C. The method has simulation, acceleration and reappearance performance, can be used to study a corrosion behavior rule ofcoal truck body steel during a service process, and can be used to quickly evaluate and predict corrosion resistance performance in the coal leachate medium, and a basis can be provided for rational material selection.

Description

technical field [0001] The invention relates to the technical field of atmospheric simulation of metal corrosion, in particular to a corrosion test method for simulating the steel used for the body of a truck in a coal leaching liquid medium. Background technique [0002] Due to its better atmospheric corrosion resistance than carbon steel, weathering steel has only added trace alloy elements compared with stainless steel, and has been widely used in important structures exposed to atmospheric environments or environments with moderately corrosive media. Since the coal truck body is not only corroded by the atmospheric environment but also by the special corrosion environment during the service process, the corrosion status of the steel used for the truck body in this environment has also received more and more attention. [0003] Coal trucks are not only subjected to atmospheric corrosion but also to special corrosive environments during their service. First of all, in ord...

Claims

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Application Information

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IPC IPC(8): G01N17/00
CPCG01N17/006
Inventor 肖葵陈俊航余伟李曌亮薛伟宋嘉良李晓刚董超芳吴俊升
Owner UNIV OF SCI & TECH BEIJING
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