Soil corrosivity accelerated test method and device

Abstract

The invention discloses a soil corrosivity accelerated test method and device. The device comprises a rectifier (14), three soil boxes (17), a heater (1), a temperature sensor (15), an information acquisition system (10), an LED (light-emitting diode) display screen (11), a PLC (programmable logic controller) control module (9) and a computer (8), wherein the soil boxes (17) in which metal test pieces (18) and graphite sheets (16) are arranged are directly connected with the rectifier (14), ammeters (13) and resistors (12), and the three soil boxes are connected in serial in a group and then placed on a same layer of a support (4) of a lower layer test region of a test box; the heater (1), an electromagnetic switch (7) and the rectifier (14) can form a loop, and the information acquisition system (10) can receive signals of the ammeters (13), the resistors (12) and the temperature sensor (15) and can display signals on the LED display screen (11) through a digital form; and the PLC control module (9), the information acquisition system (10), the resistors (12), the electromagnetic switch (7) and the computer (8) are connected. The soil corrosivity accelerated test method and device provided by the invention can both consider soil macro and microcosmic factors when a soil corrosion accelerated test is performed, so that in the accelerated test, measures the proper corrosivity of soil, close to erosion data, can be measured, and the soil corrosivity accelerated test method and device provided by the invention has the characteristics that the device is simple in structure, is high in efficiency and favorable.

Description

technical field [0001] The invention belongs to the technical field of corrosion, in particular, the invention relates to a soil corrosion accelerated test method and device. Background technique [0002] Accelerated soil corrosion test is an important means of soil corrosion research in a short period of time by artificially controlling the experimental conditions to achieve the purpose of accelerating corrosion. The previous accelerated soil corrosion test methods mainly include enhanced medium method, galvanic couple acceleration method, electrolytic weight loss method, intermittent polarization method and so on. The enhanced medium method is to change the physical and chemical properties of the soil medium (such as adding Cl - , SO 4 2- , Fe 2+ etc.) to change the soil corrosion, the limitation of this method is obviously that it changes the physical and chemical properties of the soil. Meng Xialan, Guo Zhihua and others used the galvanic couple acceleration met...

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Problems solved by technology

[0004] (1) The design of the soil corrosion accelerated test chamber is determined according to the considered factors. In the existing accelerated test chamber design, most of them have an external current. This process has played a greater role in the acceleration of corrosion, but The influence of micro-battery on soil corrosion is not considered, and some tests are carried out under the action of no external current, and the corrosion acceleration effect at this time is not satisfactory

[0005] (2) When the corrosion acceleration test chamber is controlling the temperature, it fails to effectively distribute the heat generated by the heater quickly and evenly, resulting in a certain temperature unevenness in the test chamber

[0006] (3) The existing accelerated soil corrosion test device is basically not capable of computer remote control operation, nor can it record various variables in real time, which limits the practicability of the device to a certain extent

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