Marine-splash-zone-simulating corrosion test device and testing method

Abstract

The invention discloses a marine-splash-zone-simulating corrosion test device and a marine-splash-zone-simulating corrosion testing method. The device comprises a box, liquid storage tank, a rotary sample rack, a transmission system, a spraying system, an illumination system, a temperature control system, a filtration system, a time control system and an automatic control system panel. The rotary sample rack, the spraying system, the illumination system, and the temperature control system are arranged in the box. The transmission system is arranged on the outside of the box, and is connected with the rotary sample rack. The liquid storage tank is arranged below the box. An overflow plate is arranged in the liquid storage tank, and divides the liquid storage tank into two parts, which are a sedimentation tank and a supernatant tank. The automatic control system panel is arranged above the liquid storage tank. The spraying system, the illumination system, the temperature control system, and the time control system are respectively connected with the automatic control system panel.

Description

technical field [0001] The invention relates to a corrosion test device and method, in particular to a corrosion test device and method for simulating an ocean splash zone. Background technique [0002] The ocean accounts for more than 2 / 3 of the earth's surface, and the annual corrosion loss in my country accounts for about 5% of the gross national product, and the economic loss caused by corrosion has reached one trillion yuan. Under natural conditions, the marine environment is very corrosive, and the loss of marine corrosion accounts for more than one tenth of the total corrosion loss. At the same time, marine corrosion poses a huge threat to safe production. The marine corrosion environment is usually divided into five corrosion zones: the marine atmosphere zone, the ocean splash zone, the seawater tidal range zone, the seawater immersion zone, and the sea mud zone. Metal materials have different corrosion conditions in different zones of the ocean. The marine splash z...

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Problems solved by technology

At present, the sea splash corrosion test of marine steel is mainly carried out by actual sea coupons, but this test method has the following shortcomings: the test period is generally long, the cost is relatively high, it is difficult to detect the corrosion state in real time, and the test data is highly discrete , which is not conducive to the analysis of specific factors

By adjusting the injection pressure and injection direction of the water pump, changing the form of the seawater splash formed, combined with the means of adjusting the temperature of the seawater medium through a constant temperature adjustment device, the simulated splash test in the laboratory is carried out; but the disadvantage is that the solution splash refraction method is adopted, and The sample is placed vertically and fixedly, causing the sample to be sprayed unevenly, which is not conducive to scientific analysis of the test results

And because the sprinkler system lacks time control and lacks time control devices, it cannot meet the environmental requirements of alternating wet and dry in the ocean splash zone

"A seawater splash simulation test device for environmental tests" (public number: CN 201514369U) also discloses a simulated seawater splash device, which sprays a solution with a certain amount of dissolved oxygen required through a swingable nozzle On the static sample, through the adjustment of the anti-corrosion solution pump, the adjustment of the return pipe and the control of the time relay, the impact force and impact time of the droplet can be adjusted; but the disadvantage is that the device uses three sets of spray heads to spray directly The way to the surface of the sample, different nozzles or different positions of the same nozzle will cause inconsistencies in the amount of splashing, which will cause great deviations in the results of the sample

"Ocean splash area simulation experiment device" (Guo Xiaojun, etc.), this article introduces a method that uses a motor to drive the stirring rotor to form a splash of the solution. By adjusting the speed of the motor to control the degree of water splash, the size of the wave in the ocean splash area is simulated. Use an air pump to inject air into the water to adjust the amount of dissolved oxygen in the water, and use a thermocouple to control the temperature to adjust the water temperature; but the disadvantage is that the speed of the rotating rotor and the position of the rotor in the solution determine the force of the droplet splashing on the surface of the sample. The force generated by the impact of droplets splashing on the surface of the sample cannot be adjusted, so it is impossible to simulate the corrosion test conditions of various factors such as different splash impact forces

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