Method for predicting soil corrosion rate of metal material

A metal material and soil corrosion technology, which can be used in material inspection products, soil material testing, and weighing by removing certain components, and can solve problems such as difficult corrosion prediction research.

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 soil corrosion rate of metal materials, so as to solve problems such as difficult corrosion prediction research in the prior art

Method used

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

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Experimental program
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Embodiment 1

[0020] From June 1990 to May 1992, a 2-year survey of soil 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.

[0021] Table 1, A 3 Chemical composition of steel (wt%)

[0022] C

Si

mn

P

S

Fe

0.22

＜0.05

0.48

0.012

0.022

margin

[0023] The test method is based on the "Material Soil Corrosion Test Method" compiled by the National Soil Corrosion Test Website. There are 7 types of soil, accounting for more than 90% of the usable area in Hainan. The soil at the test site has n...

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Abstract

The invention relates to a soil corrosion prediction technology, in particular to a method for predicting the soil corrosion rate of metal material, which is mainly applied to the soil corrosion prediction research on regional carbon steel. The metal material serves as test material, test points are selected in an area which needs to be predicted, a test is taken according to 'Soil Corrosion Test Method of Materials' developed by a national soil corrosion test website, and simultaneously, the chemical components of the soil of all the test points are monitored, and the test cycle is 1 to 2 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 chemical components of the soil of all the test points are calculated; a statistical method of stepwise regression analysis is adopted for regression analysis, a regression equation is established, and the soil corrosion rate of the area which needs to be predicted is predicted with the regression equation. The method for predicting the soil corrosion rate of metal material has reoccurrence, and can predict the soil corrosion of metal material.

Description

technical field [0001] The invention relates to a corrosion prediction technology for soil corrosion, in particular to a method for predicting the soil corrosion rate of metal materials, which is mainly applied to the research on soil corrosion prediction of regional metal materials. Background technique [0002] my country has carried out soil corrosion research for more than 40 years, and has done a lot of experimental work. Compared with my country's vast territory, it is still insufficient, especially in regional corrosion investigation and corrosion prediction. In the soil corrosion test in the natural environment, there are many factors that affect the corrosion of metal materials. In a pollution-free environment, the main influencing factors are: soil type and soil quality, total soluble salt in the soil, soil resistivity, water and gas content, pH value, soil microorganisms, and meteorological factors. At present, a large amount of corrosion data and environmental d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N5/04G01N33/24
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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