Simple stimulation apparatus for corrosion and electrochemistry tests in low speed pipeline
A simulation device, electrochemical technology, applied in the direction of measuring devices, scientific instruments, material analysis through electromagnetic means, etc., can solve the problems that have not been seen in the test simulation device report, difficult to find in time, limited space, etc., to achieve easy electrochemical Rapid evaluation and corresponding electrochemical data testing, simple production, and cost-saving effects
Active Publication Date: 2015-09-02
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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Problems solved by technology
[0003] Internal corrosion of transportation pipelines is the most common and most hidden in pipeline transportation. It is difficult to detect the corrosion in the early stage. Once it is detected, the corros
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Embodiment 1
[0042] In this example, after installing the corresponding samples, pour 20L of NACE A solution (5wt%NaCl+0.5wt%HAc) into the corrosion solution storage container, set the temperature of the water bath to 24°C, and close the 316L ball valve 9. Empty the air at the front end of the magnetic pump to fill it with the solution, inject 100-200ml / min N2 for two hours to remove the dissolved oxygen in the solution, and then fill the solution with H2S at a speed of 200ml / min according to the test requirements; The flow rate of / s starts to test the corresponding electrochemical potential time curve, dynamic potential polarization curve, etc., and then opens the ball valves on both sides of the corrosion sample room in the simulated pipeline, closes the ball valves on both sides of the electrochemical test room, and opens the long-term 1m / s flow rate Under the corrosion test.
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The invention discloses a simple stimulation apparatus for corrosion and electrochemistry tests in a low speed pipeline. The apparatus can realize electrochemical test in a pipeline with the flow speed being smaller than 1m/s in below 75DEG C closed environment with different corrosion media and corrosion simulation acceleration corrosion test in a pipeline with the flow speed being smaller than 3m/s. The apparatus comprises a corrosion solution storage container, a solution circulating and metering system, a simulation pipeline internal corrosion sample chamber and an electrochemical test device. The corrosion solution container is mainly used for storing a large amount of a solution, the solution circulating and metering system comprises a variable frequency magnetic pump and a flow meter, and the flow meter can determine the test flow speed; and the simulation pipeline internal corrosion sample chamber stimulates six o'clock direction corrosion and other tests in a sample stimulation pipeline, and an electrochemical test chamber comprises an electrochemical test interface, a reference electrode and an outside salt bridge. The apparatus has the advantages of great reduction of leakage of hydrogen sulfide and a solution thereof, improvement of the safety of test personnel and environment, convenient and accurate stimulation of corrosion and electrochemical parameter determination in the pipeline under practical conditions, and wide test application range.
Description
technical field [0001] The invention relates to the field of low-velocity fluids including wet hydrogen sulfide environment and its corrosive solution of mixed gas, oil products, simulated environment corrosion electrochemistry and corrosion test, specifically a simple simulation device for low-velocity pipeline internal corrosion and electrochemical test, which can be used Realize the electrochemical test in the pipeline with a flow rate of less than 1m / s in the closed environment of different corrosive media below 75°C and the simulated accelerated corrosion test in the pipeline with a flow rate of less than 3m / s. Background technique [0002] The main energy supply of the global industry is still petrochemical resources. With the demand of economic construction, oil fields containing different concentrations of hydrogen sulfide, carbon dioxide and other corrosive atmospheres are exploited, gathering and transportation and various corrosive solutions, corrosive crude oil, r...
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Inventor 刘贤斌左景辉陈新华王俭秋韩恩厚
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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