Sulfuric acid-copper sulfate-copper scrap corrosion test device for austenitic stainless steel
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A technique for corrosion testing of austenitic stainless steel, applied in measuring devices, weather resistance/light resistance/corrosion resistance, instruments, etc., can solve problems such as inability to continue, uneven heating, water and power failures, etc.
Pending Publication Date: 2020-10-13
BEIJING NORTH VEHICLE GROUP CORP +1
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[0004] The present invention proposes an austenitic stainless steel sulfuric acid-copper sulfate-copper shavings corrosion test device to solve the problem that conventional test devices require personnel to adjust the temperature and guard, the micro-boiling state of the test solution is difficult to control, and the heating is uneven, and the test has water and power cuts. Technical problems such as inability to proceed in the event of a failure
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[0023] In order to make the purpose, content and advantages of the present invention clearer, the specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.
[0024] This embodiment proposes an austenitic stainless steel sulfuric acid-copper sulfate-copper chip corrosion test device, the overall structure is as follows figure 1 As shown, including heating system, circulating cooling system and control system.
[0025] The heating system is heated by an oil bath, and the actual solution reaction temperature is measured by a high-precision AA grade Pt100 sensor. like figure 2 As shown, the heating system includes an oil bath 1-1, a stirrer 1-2, a first station tank 1-3, a second station tank 1-4, a first reaction vessel 1-5, a second reaction vessel 1- 6. Heating rods 1-7, oil bath liquid level sensors 1-8, oil bath temperature sensors 1-9 and heating medium 1-10. Wherein, ...
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Abstract
The invention provides a sulfuric acid-copper sulfate-copper scrap corrosion test device for austenitic stainless steel. A heating system comprises an oil bath cylinder, a stirrer, a station groove, areaction container, a heating rod, an oil bath cylinder liquid level sensor, an oil bath cylinder temperature sensor and a heating medium, a circulating cooling system comprises a water tank, a watertank liquid level sensor, a water tank temperature sensor, a refrigerating unit, a circulating pump, a water pipe and a condenser, and a control system comprises a touch screen, a controller, a switch, a cooling medium release valve, a current sensor, a voltage sensor and an oil and water shortage power failure alarm. Whole-process automatic control of an intergranular corrosion test can be realized, and an oil bath heating mode is adopted, so that heating is uniform; an internal circulation mode is adopted for cooling, and the refrigerating unit is added for refrigerating, so the refrigerating effect can be improved, and water resources are saved; and the control system can ensure rapid temperature rise and accurate temperature control of a reaction solution, has a water-break, power-break and oil-break alarm function, and can effectively ensure the accuracy of intergranular corrosion test.
Description
technical field [0001] The invention belongs to the technical field of physical and chemical detection and analysis of materials, and in particular relates to a sulfuric acid-copper sulfate-copper chip corrosion test device for austenitic stainless steel. Background technique [0002] The sulfuric acid-copper sulfate-copper chip corrosion test of austenitic stainless steel is the most widely used intergranular corrosion test method. In the test solution, copper sulfate is a passivating agent, sulfuric acid is a corrosive agent, and copper filings play the role of a "chemical potentiostat", so that the oxidation potential of the sample and the test solution will quickly reach a balance state, making it in the field of intergranular corrosion. Keep the natural potential, thereby shortening the test time. This method is suitable for testing the intergranular corrosion of austenitic stainless steel. The test period is 16h to 24h. The test results are evaluated by the bending me...
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