Method for detecting anticorrosion performance of 304 stainless steel under high temperature condition
A technology of 304 stainless steel and detection methods, applied in the direction of material electrochemical variables, etc., can solve problems such as difficult production, and achieve the effects of convenient use, good sealing, and simple preparation
Active Publication Date: 2018-06-29
TIANJIN UNIV
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Problems solved by technology
This kind of sensor that can work in the harsh environment of high temperature, high pressure and strong corrosion is extremely difficult to produce
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preparation example Construction
[0043] Reference-the preparation method of counter electrode device, during preparation, ceramic powder selects the Duropot809 series that U.S. Cotronics Company develops, and silver chloride wire and platinum sheet select the product of Tianjin Aida Hengsheng Technology Development Co., Ltd., carry out according to the following steps:
[0044] Step 1: Assemble the working electrode according to the structure of the working electrode device;
[0045]Step 2: Put the reference electrode and its connecting wires and the counter electrode and its connecting wires into the steel pipe to keep them out of contact with each other;
[0046] Step 3: Put 8-15 double-hole ceramic sheets on the reference electrode and the counter electrode, and clamp them on the inner wall of the steel pipe, so that the double-hole ceramic sheets are located in the middle of the steel pipe body;
[0047] Step 4: Mix ceramic powder and water according to the ratio of mass ratio (3-5): 1, pour into the stee...
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Abstract
The invention discloses a method for detecting the anticorrosion performance of 304 stainless steel under a high temperature condition. According to the method, an electrode system is installed in a high temperature high pressure reactor; and an Autolab302N electrochemical work station is used to measure the electrochemical noise spectrum of 304 stainless steel in a water solution of H3BO3 (1500ppm) and LiOH (2.3ppm). The electrode system comprises a work electrode device and a reference-counter electrode device. The upper end of the work electrode device is provided with an upper turnbuckle structure and the lower end is provided with a lower turnbuckle structure. A junction pole is arranged in a steel pipe; a first nut, a second nut, and a third nut are sequentially arranged on the steelpipe; the lower end of the junction pole is connected to a work electrode sample; a reference electrode and a counter electrode are arranged in the reference-counter electrode device; an upper insulation layer, an upper sealing layer, a double hole ceramic sheet, a lower sealing layer, and a lower insulation layer are arranged in the steel pipe in sequence from top to bottom; the upper end of the steel pipe is provided with an upper fastening nut, and the lower end of the steel pipe is provided with a lower fastening nut. The anticorrosion performance of 304 stainless steel decreases as thetemperature rises at a temperature of 25-250 DEG C.
Description
[0001] The application of the present invention is a divisional application of the parent application "an electrode system for electrochemical measurement in high temperature and high pressure water environment and its application". The filing date of the parent application is July 22, 2016. The application number is 2016105993363. technical field [0002] The invention belongs to the technical field of electrochemical electrode materials, in particular to a method for detecting the corrosion resistance of 304 stainless steel under high temperature conditions. Background technique [0003] The special sensor capable of high temperature, high pressure and corrosion resistance is a high-tech product including advanced high-temperature materials, precision machining, electronics, fine chemistry and other high-tech technologies. It is extremely difficult to produce such a sensor that can work in the harsh environment of high temperature, high pressure and strong corrosion. Sinc...
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IPC IPC(8): G01N27/30
CPCG01N27/30
Inventor 王吉会李秋实
Owner TIANJIN UNIV