Corrosion Performance Evaluation Reactor for Coatings

CHP-2 typeCorrosion Performance Evaluation Reactor for Coatings

Instrument functions

Used for high-temperature and high-pressure simulated corrosion testing of materials such as deep-sea and oil pipeline corrosion, anti-corrosion spray plates (sheets), etc., to evaluate the corrosion resistance and safety of materials and structures. Its application fields include marine engineering, metallurgical materials, aerospace, petrochemical industry, etc

1、 Main technical indicators

1Design pressure:80MPa； Working pressure: 70MPa, net size of inner cavity ￠ 130x155mm

2. Material: 304 stainless steel

3Design temperature: Room temperature~180℃； Working temperature: Room temperature~160 ℃

4. Pressure sensor with secondary digital display instrument to display pressure

5. Kettle volume: 2000mL;

6. Heating power: 1.8KW

7. Gas booster pump (medium: nitrogen, carbon dioxide) 70MPa

8. Drive boosting system: 4-way silent air compressor (380V)

9. Add a set of high-pressure six way valves

10. Liquid booster pump: 80MPa

10. Power supply: 220V/380V

2、 Components of ultra-high pressure reaction corrosion reaction device

1. Cauldron body

volume2000mL， Design pressure: 80MPa, design temperature: room temperature~180 ℃. The upper cover of the kettle body is detachable and sealed with a threaded rubber "O" ring.

2. Temperature control system

Composed of electric heating sleeve, insulation sleeve, temperature controllerPt100 temperature control probe, electrical control circuit, control chassis, control panel, etc.

Heating sleeve power1.8KW， The temperature control range is from room temperature to 180 ℃.

3．Pressure system

CO2 gas booster pump (also nitrogen gas can be used) working pressure: 70MPa, with 4 large capacity silent air compressors driving the booster pump, the reaction kettle uses CO2 and nitrogen gas booster pumps

4. Multi channel ultra-high pressure valves and pipelines

Used for connecting reaction vessels, ultra-high pressure pumps, and pipelinesф 3-6 × 1mm high-pressure stainless steel pipeline, with valves and pipelines capable of withstanding a pressure of 80MPa.

5. Pressure measurement system

Measure the pressure inside the reactor using a pressure sensor, with a pressure range100MPa。

6. Bracket

Used for installing reaction vessels, pressure pumps, and multiple channels（The components such as the 6-way valve and control box are supported by casters for easy movement.

3、 Damn it make, do, create, compose, write, etc.

1. Remove the pipeline connected to the top cover of the reaction vessel, unscrew the fixing screws on the top cover, and open the top cover.

2. Place the reactor specimen into the reactor and add the reaction medium.

3. Fix the upper cover with "O" ring on the kettle body with screws and tighten the screws.

4. Connect the ф 3-6 × 1mm pipeline to the top cover of the reaction vessel.

5. Turn on the gas compressor and booster pump, open the booster valve and pressure gauge valve, and use the booster pump to pressurize the reactor valve to the required pressure,When gas is pressurized, the valve connecting the liquid pressurization pump must be closed.

6. When heating, turn on the heating switch on the control box, set the heating temperature to the desired value on the temperature controller, and the temperature controller will automatically control the reaction kettle to heat up, ultimately keeping it constant at the desired temperature value.

When heating, due to the increase in temperature, the liquid expands and the pressure will continue to rise. At this time, it is necessary to open the vent valve in a timely manner (use the bottom vent valve of the kettle to vent) to ensure that the pressure inside the kettle does not exceed the working pressure of the kettle.

8. Liquid needs to be directly added to the liquid pump storage tank, such as kerosene, and pressurized through a combination of suction and discharge valves,When liquid is pressurized, the valve connected to the gas booster pump must be closed to prevent leakage from causing the booster pump to be scrapped

After the reaction is complete, turn off the heating switch first, and when the temperature of the kettle drops below 80 ℃, open the air valve to vent and reduce the pressure.

4、 Precautions

1. The heating furnace must have a safe and reliable grounding to prevent electric shock and injury;

2. When heating, there is a high temperature on the kettle body, which cannot be touched by hand to prevent burns.

3. All pipeline connection pressure caps must be tightened to prevent injury caused by high pressure.

4. When heating up, it is necessary to always pay attention to the increase in pressure and release it in a timely manner to prevent overpressure, damage to equipment, and injury to operators.

Corrosion operation procedures

1Connect the power supply of the equipment and the power supply of the air compressor to make the air pressure reach the set pressure (calibrated)

2Under the condition of ensuring no pressure, open the pipeline above the kettle and the six way valve, remove the screws on the kettle body, add the reaction medium, cover the kettle lid, install the screws, connect the pipeline, and set the temperature of the reaction kettle. The temperature is directly set through the up and down keys and shift keys on the temperature gauge.

3Gas pressurization operation: Connect the steel cylinder joint to the gas cylinder, open the cylinder and observe whether the air compressor pressure is sufficient. Open the intake valve on the six way valve. At this time, the pressure of the steel cylinder will balance with the pressure of the kettle body. Open the air compressor source valve, and the gas booster pump will start to work for pressurization. After reaching the required experimental pressure, close the air compressor source valve and the intake valve on the six way valve.

5Operating instructions for hydraulic manual pump: First, place the liquid medium into a water cup, confirm that the inlet valve on the six way valve is closed, open the suction valve, and rotate the manual pump handle counterclockwise until it cannot be turned. Due to the thin pipeline, wait for about five seconds before closing the suction valve. Rotate the handle clockwise to create some pressure inside the pump, then open the inlet valve. The higher the pressure inside the pump, the greater the force feedback when rotating the handle.

6Pressure relief operation: Open the vent valve above the six way valve to release air pressure, and release liquid from the vent below the kettle body. Turn off the heating switch. The small valve at the outlet of the gas booster pump needs to be vented even if it is not pressurized for a long time to reduce seal damage to the gas booster pump. Wait for the temperature to drop below room temperature and ensure there is no pressure before opening the kettle lid.

Instrument precautions

1Monitor the kettle pressure at all times to prevent overheating and overpressure beyond the range.

2Pay attention to burns.

3All needle valves of the instrument are opened counterclockwise and closed clockwise. When the valve is opened to its maximum, it should be turned back half a turn clockwise to check the on/off status of the valve.

4Regularly check the health status of the sealing ring, and replace it regularly if it is damaged. Black is105endureCO2The green color represents the high-temperature resistant model of fluororubber∅130X5.7.

5Regularly drain the air compressor.