A method for evaluating the corrosivity of polluted soil

A polluted soil and corrosive technology, applied in the direction of electrochemical variables of materials, etc., can solve the problems of many pollution soil corrosion evaluation test contents, unstable influencing factors, long test time, etc., to achieve convenient operation, simple test device, and measurement accuracy. high effect

Active Publication Date: 2016-05-11
TAIYUAN UNIV OF TECH
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Problems solved by technology

[0004] In order to solve the problems in the existing evaluation methods of the evaluation of contaminated soil corrosion, such as many test contents, long test time, unstable influencing factors, inconvenient operation, and the inability to comprehensively evaluate the corrosion of contaminated soil by considering a single factor, the present invention provides A new method for evaluating the corrosivity of polluted soil

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  • A method for evaluating the corrosivity of polluted soil
  • A method for evaluating the corrosivity of polluted soil
  • A method for evaluating the corrosivity of polluted soil

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Embodiment Construction

[0020] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0021] A method for evaluating the corrosivity of polluted soil, comprising the steps of:

[0022] (1) Preparation of contaminated soil samples: Take a certain amount of uncontaminated soil samples and prepare three different contaminated soil samples with the same pollution concentration and different water content by manual mixing method 7. The contaminated soil samples all have the same pollution The concentration of NaCl is 3.5%, and the water content of different contaminated soil samples is 9%, 12% and 15% respectively; use a light compaction cylinder to compact the configured contaminated soil samples, and the compaction method refers to the "Standards for Geotechnical Test Methods" (GB / T50123—1999), the compaction standard is to control the dry density of the standard sand after compaction to 1.65g / cm 3 ; The uncontaminated soil sampl...

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Abstract

The invention discloses a method for evaluating the corrosivity of polluted soil. The method comprises the steps of preparing a polluted soil sample, manufacturing a test cutting ring, testing an electrochemical impedance spectrum, evaluating an electrochemical impedance test, fitting a polluted soil equivalent circuit diagram, evaluating a fitting result and evaluating the corrosivity of the polluted soil. An intersection of the Nyquist curve and an impedance real part of the polluted soil sample and the radius of a capacitive reactance arc of the curve are compared under the same test condition; the smaller the intersection is, the smaller the radius of the capacitive resistance arc is, the higher the corrositivity of the polluted soil is; the larger the intersection is, the greater the radius of the capacitive resistance arc is, the lower the corrositivity of the polluted soil is. According to the method for evaluating the corrosivity of the polluted soil, a required test device is simple, the measurement precision is high, and the operation is convenient.

Description

technical field [0001] The invention relates to the field of corrosion tests of polluted soil, in particular to a method for evaluating the corrosivity of polluted soil. Background technique [0002] The evaluation and treatment of contaminated soil involves multidisciplinary fields such as geotechnical engineering, environmental engineering, soil science, chemistry and chemical engineering, and testing technology, and is a hot issue that has not been fully resolved in the world. Electrochemical impedance spectroscopy has been widely used in multiple disciplines and has gradually become a powerful method for the study of the durability of building materials, which provides a new idea for the application of electrochemical impedance spectroscopy theory in the field of geotechnical engineering; based on the electrochemical impedance spectroscopy theory, Various testing methods such as physics, chemistry, and electrochemistry are used to test the relationship between the minera...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/26
Inventor 白晓红何斌韩鹏举杜湧王林浩马富丽张文博
Owner TAIYUAN UNIV OF TECH
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