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Contrast simulation testing device for carbon dioxide corrosion resistant performance of steel and testing method thereof
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A corrosion performance and simulation test technology, applied in the field of material corrosion, can solve the problems of high cost, different functions and purposes, high cost and inconvenient, etc., and achieve the effect of high control precision, stable performance and simple operation
Inactive Publication Date: 2013-01-02
NANJING IRON & STEEL CO LTD
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[0010] The above patents are all methods and devices related to corrosion testing, but either have different functional purposes, or have no detailed test methods and means, or are expensive and inconvenient
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[0040] (1) Process the steel into an arc-shaped sample of φ87mm, after being polished with 800# sandpaper, immerse it in a beaker filled with acetone, put it into an ultrasonic cleaner for 20 minutes, and remove the oil stain on the surface of the sample, Alcohol cleaning cold airdrying;
[0041] (2) Place the sample on an electronic analytical balance with an accuracy of 0.1 mg to weigh it, measure the size with a vernier caliper with an accuracy of 0.02 mm, calculate the area of the corrosion surface of the sample, and record the measured data; each group of experiments is inlaid with multiple arcs Put the sample on the sample holder and put it into the reaction kettle;
[0042] (3) Proportioning test solution A, with CO 2 After deoxygenation for 10 hours, pass it into the solution pool and the reaction...
[0053] Specific operation in addition to solution, temperature, CO 2 Partial pressure is different, and other processes are with embodiment 1:
[0054] The corrosion rates (mm / a) of the experimental steel types are Q235B, 2.05; L415, 1.85; 304, 0.007; 316L, 0.003.
[0055] The order of corrosion rate from high to low in Example 1 is L415 > Q235B > 304 stainless steel > 316L stainless steel;
[0056] The order of the corrosion rate of embodiment 2 from high to low is Q235B > L415 > 304 stainless steel > 316L stainless steel;
[0057] The experimental device of the present invention has simple structure, stable performance, high control precision and simple operation, and can be used for the anti-CO 2 Comparative simulation test of corrosion performance. Provide simulated CO in crude oil 2 The corrosion of steel under corrosion conditions provides m...
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Abstract
The invention discloses a contrast simulation testing device for carbon dioxidecorrosion resistant performance of steel and a testing method thereof. The device comprises a reaction kettle, a solution pond and a pressure adjusting device, wherein the solution tank is connected with the reaction kettle by a liquid control valve; a heating rod and a heat insulation material are wound on the outer wall of the reaction kettle; a thermal couple and a temperature adjuster are arranged in the reaction kettle; a sample clamp connected with a stirring device is arranged in the reaction kettle; and a pressure adjusting device comprises a CO2 gas tank and an N2 gas tank which are connected with the bottom of the reaction kettle. The method is used for contrasting and simulating a condition that a pipeline steel material is corroded by CO2 in crude oil so as to evaluate corrosion velocity of the steel material of which the temperature is between 90 and 120 DEG C, CO2 partial pressure is between 1 and 2.4MPa in the solution. The CO2 corrosion resistant performance of the steel with different materials, steel levels and thicknesses can be tested at the same time, and the test is convenient and easy. Corrosionsimulation test of various oil fields is performed by adjusting the temperature, partial pressure and solution components.
Description
[0001] technical field [0002] The invention relates to the field of material corrosion, in particular to a steel anti-CO 2 Corrosionperformance comparisonsimulation test device and its test method. Background technique [0003] In recent years, domestic and foreign vigorously develop CO 2 Development and application of oil flooding enhanced oil recovery technology. CO 2 Oil flooding has the advantages of wide application range, low cost of oil flooding, and significant improvement of recovery factor. But CO 2 Corrosion is an extremely prominent problem that plagues the development of my country's oil and gas industry. [0004] CO in crude oil pipelines 2 Corrosion is specifically CO in high temperature and high pressure multiphase flow media 2 Corrosion has many influencing factors. Not only will large-scale general corrosion occur, but also localized corrosion such as point, terrace, vortex, honeycomb and flask will often occur, which is harmful and difficult to ...
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