Deep and shallow sea alternating corrosion environment simulator

Abstract

The invention belongs to the technical field of marine corrosion and protection, and relates to a deep and shallow sea alternating corrosion environment simulator. Periodic changes of parameters such as pressure, temperature, dissolved oxygen and pH value are controlled to simulate alternating corrosion environment of sea water at different depths, and realize material performance test in the environment, so as to evaluate various performances of the material in deep and shallow sea alternating corrosion environment. The simulator comprises a pressure alternating system, a salinity regulating system, a pH value regulating system, a temperature control system, a dissolved oxygen regulating system, an auxiliary regulating system, a counterbalance valve, a central control board and a host computer. Medium temperature, medium dissolved oxygen and pH value are adjusted to simulate environmental parameters of deep sea or high pressure; and then a pressure alternating system is employed to conduct pressure change according to a set pressure curve, so as to simulate deep sea alternating environment and evaluate material properties. The simulator has simple structure principle, reliable usage and operation, real stimulating effects, good effects of deep and shallow sea alternating experiments, and strong practicability.

Description

Technical field: [0001] The invention belongs to the technical field of marine corrosion and protection, and relates to a device for simulating alternating corrosion environments in deep and shallow seas. By controlling the periodic changes in parameters such as pressure, temperature, dissolved oxygen and pH value, the corrosion environment of seawater at different depths is simulated, And in this environment, the material performance test can be realized, which can be used to evaluate the various properties of the material in the alternating deep and shallow sea environment. Background technique: [0002] The marine environment is a harsh natural environment for metal materials. Various engineering structures serving in the marine environment will inevitably suffer from seawater corrosion. The deep sea environment has much higher requirements for material structure and functional reliability than land and shallow seas. Compared with the shallow sea environment, when the pre...

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Problems solved by technology

Deep-sea corrosion research mainly includes deep-sea actual sea test and laboratory simulation test. The real-sea simulation experiment can obtain the performance data of materials in the actual deep-sea environment, but it requires a lot of manpower and material resources, high investment, long period, and difficult observation. Especially in the deep sea environment, the test failure rate is high and the sample loss rate is large. Therefore, in recent years, on the basis of the real sea test and the collection of real sea environmental parameters, the laboratory simulation test research has been carried out, and the establishment of The deep-sea environment simulation experiment device is set up, and the simulation of the deep-sea environment is realized through the control of parameters such as pressure, temperature and dissolved oxygen, thus providing more convenient conditions for deep-sea corrosion research

Current research shows that, in addition to the influence of environmental parameters themselves on the corrosion performance of materials, alternating changes in environmental parameters will also affect the performance of materials, such as alternating pressure may cause stress corrosion of materials, accelerated coating aging, etc., but currently There is no public report on the simulation test device and the corresponding evaluation method that can be used in the deep-shallow sea alternating environment

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