Method for predicting atmospheric corrosion rate of metal material

A metal material and atmospheric corrosion technology, applied in the fields of weather resistance/light resistance/corrosion resistance, analytical materials, measuring devices, etc., can solve difficult corrosion prediction research and other problems

Inactive Publication Date: 2010-07-21
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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Problems solved by technology

[0003] The purpose of the present invention is to provide a method for predicting the atmospheric corrosio...

Method used

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  • Method for predicting atmospheric corrosion rate of metal material
  • Method for predicting atmospheric corrosion rate of metal material
  • Method for predicting atmospheric corrosion rate of metal material

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Embodiment 1

[0055]From June 1990 to May 1992, a 2-year survey of atmospheric corrosion was carried out in Hainan. There are test points in 20 cities and counties, basically evenly distributed. The test material is Q235 steel, and the sample size is 100mm×50mm×3mm. The chemical composition of Q235 steel is shown in Table 1. The sample is processed to smoothness by milling machine and grinding machine or above, remove oil with acetone, dehydrate with ethanol, place in a desiccator for 24 hours, and weigh with an analytical balance with a sensitivity of 0.1 mg.

[0056] Table 1, A 3 Chemical composition of steel (wt%)

[0057] C

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Abstract

The invention relates to an atmospheric corrosion prediction technology, in particular to a method for predicting the atmospheric corrosion rate of metal material, which is mainly applicable to the atmospheric corrosion prediction research on regional carbon. The metal material serves as test material, test points are selected in an area which needs to be predicted, a natural exposure test is taken according to ISO/DIS8565-1987 'General Rules on Outdoor Atmospheric Corrosion Test of Metal and Alloy', and simultaneously, meteorological factors of all the test points are monitored, and the test cycle is 1 to 3 years; after the test, the rust of the test material is removed, after a sample is dried and weighed, the corrosion weight loss is calculated, and simultaneously, the meteorological data of all the test points is calculated; a statistical method of multiple linear regression analysis is adopted for regression analysis, a regression equation is established, and the atmospheric corrosion rate of the area which needs to be predicted is predicted with the regression equation. The method for predicting the atmospheric corrosion rate of metal material has reoccurrence, and can predict the atmospheric corrosion of various steel in various area environments.

Description

technical field [0001] The invention relates to a corrosion prediction technology for atmospheric corrosion, specifically a method for predicting the atmospheric corrosion rate of metal materials, which is mainly used in the research on the prediction of atmospheric corrosion of regional carbon steel, low alloy steel, copper, aluminum, zinc or other metal materials . Background technique [0002] Atmospheric corrosion research has been carried out in my country for more than 30 years, and a lot of experimental work has been done. Compared with my country's vast territory, it is still insufficient, especially in terms of regional corrosion investigation and corrosion prediction. There are many factors that affect the corrosion of metal materials in the exposure corrosion test in the natural environment. In an environment with no pollution or less environmental pollution, the main influencing factors are relative temperature, relative humidity, rainfall (or rainfall hours), a...

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Application Information

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IPC IPC(8): G01N17/02G01N5/04
Inventor 于国才陈鸿川王振尧韩薇
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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