Jet type stress-erosion corrosion test device

Abstract

The invention relates to a jet type stress-erosion corrosion test device. The device comprises a liquid storage tank, a circulating system, a test piece mounting and stress loading mechanism; the testdevice is characterized in that a heater is arranged in the liquid storage tank and used for heating a test solution in the tank; the circulating system is provided with a water pump, an air pump andan air-liquid mixer; the water pump is used for sucking the test solution in the tank into the air-liquid mixer, the air pump is connected to the air-liquid mixer, the air-liquid mixer communicates with a nozzle through a pipeline, a sand storage tank is arranged on the pipeline at the front end of the nozzle, and the particle content entering the pipeline is controlled through an adjusting valve; a temperature sensor and a flowmeter for measuring the temperature and flow of a transmission medium input into the pipeline from the air-liquid mixer are arranged at an upstream of a sand storage tank mounting place; the heater power is adjusted according to the reading of the temperature sensor, the rotating speeds of the water pump and the air pump are controlled according to the reading of the flowmeter, thereby controlling the jet velocity. The evaluation research on the stress-erosion corrosion performance test and the corrosion mechanism of the metal material, the nonmetallic material, the composite material and the stress erosion corrosion resistant coating can be performed.

Description

technical field

[0001] The invention relates to the field of erosion-corrosion experiments, and more specifically relates to a spray-type erosion-corrosion experimental device considering the joint action of stress and corrosion gas and liquid.

[0002] technical background

[0003] Erosion corrosion generally exists in petroleum, chemical, shipbuilding and other industries. Metal parts in contact with corrosive media are often subject to severe two-phase flow or multi-phase flow erosion and corrosion wear, which may lead to component failure or equipment scrapping.

[0004] Erosion corrosion is a very complex process, and there are many factors affecting the corrosion rate, including material factors, environmental factors and mechanical factors. Deep-water structures are often under stress under working conditions, and may be eroded by various corrosive media such as sandy seawater and high-temperature crude oil. The impact of stress factors on erosive corrosion cannot be ...

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