A corrosion exposure test device simulating a deep water retention environment with variable depth and variable period

Abstract

The present application relates to the technical field of material corrosion test, and particularly relates to a corrosion exposure test device for simulating a deep water retention environment with variable depth and variable period, which is put into water, and then is sunk to a suitable height by the weight of a steel counterweight, and then the position of the test device is adjusted by a height adjusting mechanism, so that the test device can be tested in seawater at different depths, and in-situ electrochemical test, crevice corrosion test, galvanic corrosion test and pitting corrosion test can be carried out on multiple samples, and data can be collected, so that the practicability of the equipment is improved. The corrosion exposure test device comprises an anchor chain and a steel counterweight. The corrosion exposure test device further comprises a height adjusting mechanism and a test device, the height adjusting mechanism is installed at the bottom of the test device, and the steel counterweight is installed at the bottom of the height adjusting mechanism through the anchor chain.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of material corrosion test, in particular to a corrosion exposure test device for simulating variable-depth and variable-period deep water retention environment. BACKGROUND

[0002] Deep-sea mineral resources are very rich, and the development of mineral resources has great strategic significance. Exploring and exploiting these resources requires the development of a large number of new marine engineering equipment. The environmental conditions such as pressure, temperature, pH value, dissolved oxygen, and biological fouling in deep sea are quite different from those in shallow sea. The extremely complex marine environment makes deep-sea equipment prone to electrochemical corrosion. The corrosion problem of deep-sea equipment materials has attracted more and more attention. High-strength steel, stainless steel, copper alloy, aluminum alloy, titanium alloy and their connecting parts, and other structures are widely used in surface ships, underwater facilities and deep-sea equipment. Once the corrosion problem of these facilities and equipment occurs, it is likely to cause structural failure, leading to serious consequences. In addition, the key structures of many deep-sea equipment are in a working state that withstands deep-sea high pressure but is isolated from deep-sea environmental disturbances such as seawater flow and seabed bubbles. This requires the design of a deep-sea retention environment to simulate the working environment of the key structure of deep-sea equipment, so as to more truly study the corrosion state of the structure. Studying the deep-sea corrosion behavior of materials and structures, especially the in-situ electrochemical corrosion characteristics, is of great significance for evaluating the deep-sea environmental adaptability of equipment, predicting the service life, and thus ensuring the safe and reliable operation of equipment.

[0003] The existing deep-sea retention test device, such as the full-sea depth simulation friction corrosion test device disclosed in the patent with the authorization announcement number CN106546505B, is mainly composed of a high-pressure kettle, an electrochemical workstation, a reference motor assembly, and a working electrode package. When in use, the device has the functions of electrochemical measurement and electrochemical protection under pressure environment, especially under ultra-high pressure environment. Compared with traditional friction and wear test devices, it can simultaneously perform friction and wear and dynamic corrosion measurement, thereby evaluating the proportion of wear and corrosion in material failure, and exploring the interaction rules and failure characteristics between wear and corrosion of materials in marine environment. It can also meet the special working conditions under deep-sea environment and overcome the shortcomings of fragile glass shell of traditional reference electrode and easy clogging of porous ceramic. However, the existing deep-sea retention test device has a relatively simple structure, which is not convenient for adjusting the height of the test box and collecting and storing test data, resulting in poor practicality. Therefore, there is an urgent need for a corrosion exposure test device for simulating variable-depth and variable-period deep water retention environment. SUMMARY

[0004] In order to solve the above technical problems, the present application provides a corrosion exposure test device for simulating variable depth and variable period deep water retention environment, which comprises an anchor chain and a steel counterweight; further comprising a height adjusting mechanism and a test mechanism, the height adjusting mechanism is installed at the bottom of the test mechanism, and the steel counterweight is installed at the bottom of the height adjusting mechanism through the anchor chain.

[0005] The corrosion exposure test device for simulating variable depth and variable period deep water retention environment comprises an anchor chain and a steel counterweight; further comprising a height adjusting mechanism and a test mechanism, the height adjusting mechanism is installed at the bottom of the test mechanism, and the steel counterweight is installed at the bottom of the height adjusting mechanism through the anchor chain.

[0006] The steel counterweight counterbalances the height adjusting mechanism, the height adjusting mechanism adjusts the height of the test mechanism, and the test mechanism respectively performs electrochemical in-situ test, crevice corrosion test, galvanic corrosion test and pitting corrosion test on multiple test samples, and collects test data.

[0007] The corrosion exposure test device for simulating variable depth and variable period deep water retention environment comprises an anchor chain and a steel counterweight; further comprising a height adjusting mechanism and a test mechanism, the height adjusting mechanism is installed at the bottom of the test mechanism, and the steel counterweight is installed at the bottom of the height adjusting mechanism through the anchor chain.

[0008] Preferably, the test mechanism comprises a top floating ball, a lifting rope, a test box floating ball, a test box and a data automatic acquisition and storage device, the test box floating ball is installed at the bottom end of the top floating ball through the lifting rope, the test box is installed at the bottom end of the test box floating ball, and the data automatic acquisition and storage device is installed on the test box; multiple test samples are installed in the test box, the test box is pulled upward by the buoyancy of the top floating ball and the test box floating ball, and the test box is pulled downward by the weight of the steel counterweight, so that the test box is perpendicular to the seawater, then the multiple test samples are tested in the test box, and the data during the test process is collected and saved by the data automatic acquisition and storage device, thereby improving the practicability of the equipment.

[0009] Preferably, the test box comprises two groups of round iron rings, a plurality of test box connecting ropes, a plurality of groups of bolted connecting rings, water-tight joints, blasting valves, a stainless steel shell and a test frame, the top of the stainless steel shell is provided with a top cover, the water-tight joints are all mounted on the top cover, the plurality of groups of bolted connecting rings are respectively mounted on the top end and the bottom end of the stainless steel shell, the plurality of test box connecting ropes are divided into two groups, each group has three test box connecting ropes, one end of the three test box connecting ropes in the top group is connected with the top round iron ring, the other end of the three test box connecting ropes in the top group is respectively connected with the plurality of groups of bolted connecting rings at the top, one end of the three test box connecting ropes in the bottom group is connected with the bottom round iron ring, the other end of the three test box connecting ropes in the bottom group is respectively connected with the plurality of groups of bolted connecting rings at the bottom, and the plurality of groups of bolted connecting rings at the top and the plurality of groups of bolted connecting rings at the bottom are all in triangular distribution, the test frame is mounted in the interior of the stainless steel shell, and the stainless steel shell is in cylindrical shape, the in-situ electrochemical sample mechanism, the crevice corrosion sample, the galvanic corrosion sample and the pitting corrosion sample are all mounted in the interior of the test frame, the blasting valve is mounted at the top of the stainless steel shell, and the bottom of the blasting valve is provided with a ball valve and the top end of the blasting valve is provided with a water inlet; before the test, the in-situ electrochemical sample mechanism, the crevice corrosion sample, the galvanic corrosion sample and the pitting corrosion sample are mounted on the test frame in the stainless steel shell, a certain distance is kept between the in-situ electrochemical sample mechanism, the crevice corrosion sample, the galvanic corrosion sample and the pitting corrosion sample, the sample of passivated metal is mounted above the sample of easy corrosion type, so as to reduce the pollution of the sample of passivated metal caused by the corrosion product falling off the sample of easy corrosion type during the test, then the test device is put into the sea, when the test box reaches the target depth, the blasting valve is automatically opened, the seawater enters into the interior of the stainless steel shell from the water inlet, a deep water retention environment is caused, different specifications of blasting valves can be mounted on the test box, and the blasting valves are opened at different water depths, so that a target water depth retention environment is caused, and the practicability of the equipment is improved.

[0010] Preferably, the data automatic acquisition and storage device comprises a support frame, a pressure-resistant shell and a fixing plate, the support frame is installed on the stainless steel shell through the fixing plate, the pressure-resistant shell is installed in the inside of the support frame, and the inside of the pressure-resistant shell is provided with a pressure monitoring module, a temperature monitoring module, a PH monitoring module, a salinity monitoring module, a dissolved oxygen monitoring module, an in-situ electrochemical test module and a data automatic storage module; the natural environment data at different test positions in the deep sea and the in-situ electrochemical corrosion data of the sample are tested and stored in real time through the pressure monitoring module, the temperature monitoring module, the PH monitoring module, the salinity monitoring module, the dissolved oxygen monitoring module and the in-situ electrochemical test module in the inside of the pressure-resistant shell, and the data are stored through the data automatic storage module, and then the relationship between the natural environment factors in the deep sea and the material electrochemical corrosion law can be obtained through processing and analysis, thereby providing a method and a way for in-depth analysis of the material corrosion mechanism and prediction of the material corrosion rate, and the practicability of the equipment is improved.

[0011] Preferably, the height adjusting mechanism comprises a first connecting rope, a second connecting rope, a third connecting rope, a fourth connecting rope, a plurality of groups of floating ball connecting rope storage boxes, a releaser floating ball and a releaser, the top ends of the first connecting rope, the second connecting rope, the third connecting rope and the fourth connecting rope are installed on the bottom of the test box, the bottom ends of the first connecting rope, the second connecting rope, the third connecting rope and the fourth connecting rope are installed on the releaser, the releaser floating ball is installed on the releaser, the bottom end of the releaser is connected with the top end of the anchor chain, and the plurality of groups of floating ball connecting rope storage boxes are installed on the first connecting rope, the second connecting rope, the third connecting rope and the fourth connecting rope respectively; after the test device is put into the sea, the test box is located in the seawater with a depth of four kilometers, the test is carried out for a certain period, after the test is completed, the first connecting rope is released through the releaser, the test box is floated up under the buoyancy of the top floating ball and the test box floating ball, then the test box is controlled to rise to the seawater with a depth of three kilometers through the second connecting rope, the test is continued, and so on, after the test box is in the seawater with a depth of two kilometers for a certain period, the third connecting rope is released through the releaser, the test box is floated up under the buoyancy of the top floating ball and the test box floating ball, the test box is controlled to rise to the seawater with a depth of one kilometer through the fourth connecting rope, the test is continued, and the length of the connecting rope can be set according to the test requirement, so that the test requirement at different water depths is met, and the practicability of the equipment is improved.

[0012] Preferably, the in-situ electrochemical sample mechanism comprises a wire, a circular plastic tube, epoxy resin and an in-situ electrochemical sample, the in-situ electrochemical sample is installed in the circular plastic tube through the epoxy resin, a fixing hole is arranged at the top of the circular plastic tube, one end of the wire is connected to the in-situ electrochemical sample, and the other end of the wire is connected to the pressure-resistant shell through a watertight plug; the in-situ electrochemical sample is conveniently tested in-situ, so that the practicability of the equipment is improved.

[0013] Compared with the prior art, the beneficial effects of the present application are:

[0014] 1. Simultaneously testing multiple groups of samples and monitoring the surrounding environment, and storing the monitoring data and the test data;

[0015] 2. Adjusting the height of the test box to facilitate the retention test at different depths;

[0016] 3. Simple structure, convenient installation and disassembly, suitable for use in different deep sea environments. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a structural schematic diagram of the present application;

[0018] Figure 2 is a structural schematic diagram of the test box of the present application;

[0019] Figure 3 is a structural schematic diagram of the in-situ electrochemical sample mechanism of the present application;

[0020] Figure 4 is a structural schematic diagram of the data automatic acquisition and storage device of the present application;

[0021] Markings in the drawings: 1, top floating ball; 2, lifting rope; 3, test box floating ball; 4, test box; 5, data automatic acquisition and storage device; 6, first connecting rope; 7, second connecting rope; 8, third connecting rope; 9, fourth connecting rope; 10, floating ball connecting rope storage box; 11, releaser floating ball; 12, releaser; 13, anchor chain; 14, steel counterweight; 21, circular iron ring; 22, test box connecting rope; 23, bolted connecting ring; 24, watertight joint; 25, in-situ electrochemical sample mechanism; 26, crevice corrosion sample; 27, galvanic corrosion sample; 28, pitting corrosion sample; 29, water inlet; 30, burst valve; 31, ball valve; 32, stainless steel shell; 33, test frame; 42, support frame; 43, pressure-resistant shell; 44, fixing plate; 51, wire; 52, circular plastic tube; 53, epoxy resin; 54, in-situ electrochemical sample. DETAILED DESCRIPTION

[0022] To facilitate understanding of the present invention, a more complete description will be given below with reference to the accompanying drawings. The present invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

[0023] Example 1

[0024] like Figure 1 As shown, it includes an anchor chain 13 and a steel counterweight 14; it also includes a height adjustment mechanism and a testing mechanism, with the height adjustment mechanism installed at the bottom of the testing mechanism, and the steel counterweight 14 installed at the bottom of the height adjustment mechanism via the anchor chain 13;

[0025] The steel counterweight 14 counterweights the height adjustment mechanism, which adjusts the height of the test mechanism. The test mechanism performs electrochemical in-situ testing, crevice corrosion testing, galvanic corrosion testing, and pitting corrosion testing on multiple samples, and collects test data.

[0026] like Figures 1 to 4 As shown, the test mechanism includes a top float 1, a suspension rope 2, a test chamber float 3, a test chamber 4, and an automatic data acquisition and storage device 5. The test chamber float 3 is installed at the bottom of the top float 1 via the suspension rope 2, the test chamber 4 is installed at the bottom of the test chamber float 3, and the automatic data acquisition and storage device 5 is installed on the test chamber 4.

[0027] like Figure 2As shown, the test box 4 includes two groups of round iron rings 21, a plurality of test box connecting ropes 22, a plurality of groups of bolted connecting rings 23, water-tight joints 24, a blasting valve 30, a stainless steel shell 32, and a test frame 33. The top of the stainless steel shell 32 is provided with a top cover, and the water-tight joints 24 are all mounted on the top cover. The plurality of groups of bolted connecting rings 23 are respectively mounted on the top end and the bottom end of the stainless steel shell 32. The plurality of test box connecting ropes 22 are divided into two groups, each group having three test box connecting ropes 22. The three test box connecting ropes 22 in the top group are connected to the top round iron ring 21 at one end, and are respectively connected to the top groups of bolted connecting rings 23 at the other end. The three test box connecting ropes 22 in the bottom group are connected to the bottom round iron ring 21 at one end, and are respectively connected to the bottom groups of bolted connecting rings 23 at the other end. The top groups of bolted connecting rings 23 and the bottom groups of bolted connecting rings 23 are all in a triangular distribution. The test frame 33 is installed inside the stainless steel shell 32, and the stainless steel shell 32 is in a cylindrical shape. The in-situ electrochemical sample mechanism 25, the crevice corrosion sample 26, the galvanic corrosion sample 27, and the pitting corrosion sample 28 are all installed inside the test frame 33. The blasting valve 30 is installed on the top of the stainless steel shell 32, and the bottom of the blasting valve 30 is provided with a ball valve 31, and the top end of the blasting valve 30 is provided with a water inlet 29.

[0028] As shown in Figure 4 The data automatic acquisition and storage device 5 includes a support frame 42, a pressure-resistant shell 43, and a fixing plate 44. The support frame 42 is installed on the stainless steel shell 32 through the fixing plate 44. The pressure-resistant shell 43 is installed inside the support frame 42, and the inside of the pressure-resistant shell 43 is provided with a pressure monitoring module, a temperature monitoring module, a PH monitoring module, a salinity monitoring module, a dissolved oxygen monitoring module, an in-situ electrochemical testing module, and a data automatic storage module.

[0029] Before the test, the in-situ electrochemical sample mechanism 25, crevice corrosion sample 26, galvanic corrosion sample 27, and pitting corrosion sample 28 are installed on the test frame 33 inside the stainless steel shell 32. A certain distance is maintained between the in-situ electrochemical sample mechanism 25, crevice corrosion sample 26, galvanic corrosion sample 27, and pitting corrosion sample 28, so that the passivated metal samples are installed above the easily corroded samples. This reduces the risk of corrosion products from the easily corroded samples falling off and contaminating the passivated metal samples during the test. The test device is then placed in the sea. The weight of the steel counterweight 14 causes the test device to sink to a suitable height. The buoyancy of the top float 1 and the test chamber float 3 pulls the test chamber 4 upward, while the weight of the steel counterweight 14 pulls the test chamber 4 downward, making the test chamber 4 perpendicular to the seawater. When the test chamber 4 reaches a certain depth, the burst valve 30 automatically opens, and seawater enters through the inlet 29. The test apparatus is inserted into the stainless steel outer shell 32, creating a deep-water retention environment. The position of the test apparatus is then adjusted via a height adjustment mechanism, allowing it to conduct tests at different depths of seawater. Multiple samples undergo electrochemical in-situ testing, crevice corrosion testing, galvanic corrosion testing, and pitting corrosion testing. The pressure-resistant outer shell 43 houses pressure monitoring, temperature monitoring, pH monitoring, salinity monitoring, dissolved oxygen monitoring, and in-situ electrochemical testing modules, which monitor and store real-time data on the natural environment and in-situ electrochemical corrosion of the samples at different deep-sea test locations. This data is automatically stored via a data storage module. After processing and analysis, the relationship between deep-sea environmental factors and the electrochemical corrosion patterns of materials can be obtained, providing methods and pathways for in-depth analysis of material corrosion mechanisms and prediction of corrosion rates, thereby improving the practicality of the equipment.

[0030] Example 2

[0031] like Figure 1 As shown, it includes an anchor chain 13 and a steel counterweight 14; it also includes a height adjustment mechanism and a testing mechanism, with the height adjustment mechanism installed at the bottom of the testing mechanism, and the steel counterweight 14 installed at the bottom of the height adjustment mechanism via the anchor chain 13;

[0032] The steel counterweight 14 counterweights the height adjustment mechanism, which adjusts the height of the test mechanism. The test mechanism performs electrochemical in-situ testing, crevice corrosion testing, galvanic corrosion testing, and pitting corrosion testing on multiple samples, and collects test data.

[0033] like Figures 1 to 4 As shown, the test mechanism includes a top float 1, a suspension rope 2, a test chamber float 3, a test chamber 4, and an automatic data acquisition and storage device 5. The test chamber float 3 is installed at the bottom of the top float 1 via the suspension rope 2, the test chamber 4 is installed at the bottom of the test chamber float 3, and the automatic data acquisition and storage device 5 is installed on the test chamber 4.

[0034] As shown in Figure 2 The test box 4 includes two groups of round iron rings 21, a plurality of test box connecting ropes 22, a plurality of groups of bolted connecting rings 23, water-tight joints 24, a blasting valve 30, a stainless steel shell 32, and a test frame 33. The top of the stainless steel shell 32 is provided with a top cover, and the water-tight joints 24 are all mounted on the top cover. The plurality of groups of bolted connecting rings 23 are respectively mounted on the top end and the bottom end of the stainless steel shell 32. The plurality of test box connecting ropes 22 are divided into two groups, each group having three test box connecting ropes 22. The top group of three test box connecting ropes 22 are connected to the top round iron ring 21 at one end, and are connected to the top group of bolted connecting rings 23 at the other end. The bottom group of three test box connecting ropes 22 are connected to the bottom round iron ring 21 at one end, and are connected to the bottom group of bolted connecting rings 23 at the other end. The top group of bolted connecting rings 23 and the bottom group of bolted connecting rings 23 are both in a triangular distribution. The test frame 33 is installed inside the stainless steel shell 32, and the stainless steel shell 32 is in a cylindrical shape. The in-situ electrochemical sample mechanism 25, the crevice corrosion sample 26, the galvanic corrosion sample 27, and the pitting corrosion sample 28 are all installed inside the test frame 33. The blasting valve 30 is installed on the top of the stainless steel shell 32, and the bottom of the blasting valve 30 is provided with a ball valve 31, and the top end of the blasting valve 30 is provided with a water inlet 29.

[0035] As shown in Figure 4 The data automatic acquisition and storage device 5 includes a support frame 42, a pressure-resistant shell 43, and a fixing plate 44. The support frame 42 is installed on the stainless steel shell 32 through the fixing plate 44. The pressure-resistant shell 43 is installed inside the support frame 42, and the inside of the pressure-resistant shell 43 is provided with a pressure monitoring module, a temperature monitoring module, a PH monitoring module, a salinity monitoring module, a dissolved oxygen monitoring module, an in-situ electrochemical testing module, and a data automatic storage module.

[0036] As shown in Figure 1 The height adjusting mechanism includes a first connecting rope 6, a second connecting rope 7, a third connecting rope 8, a fourth connecting rope 9, a plurality of groups of floating ball connecting rope storage boxes 10, a releaser floating ball 11, and a releaser 12. The top ends of the first connecting rope 6, the second connecting rope 7, the third connecting rope 8, and the fourth connecting rope 9 are all installed on the bottom of the test box 4. The bottom ends of the first connecting rope 6, the second connecting rope 7, the third connecting rope 8, and the fourth connecting rope 9 are all installed on the releaser 12. The releaser floating ball 11 is installed on the releaser 12. The bottom end of the releaser 12 is connected to the top end of the anchor chain 13. The plurality of groups of floating ball connecting rope storage boxes 10 are respectively installed on the first connecting rope 6, the second connecting rope 7, the third connecting rope 8, and the fourth connecting rope 9.

[0037] As shown in Figure 3 The in-situ electrochemical sample mechanism 25 includes a wire 51, a circular plastic tube 52, an epoxy resin 53, and an in-situ electrochemical sample 54, the in-situ electrochemical sample 54 is installed in the circular plastic tube 52 through the epoxy resin 53, and the top of the circular plastic tube is provided with a fixing hole, one end of the wire 51 is connected to the in-situ electrochemical sample 54, and the other end of the wire 51 is connected to the pressure-resistant shell 43 through a water-tight plug;

[0038] Before the test, the in-situ electrochemical test sample mechanism 25, the crevice corrosion test sample 26, the galvanic corrosion test sample 27 and the pitting corrosion test sample 28 are installed on the test frame 33 in the stainless steel shell 32, and a certain distance is kept between the in-situ electrochemical test sample mechanism 25, the crevice corrosion test sample 26, the galvanic corrosion test sample 27 and the pitting corrosion test sample 28, the passivated metal sample is installed above the easily corroded sample, so as to reduce the pollution of the corrosion product generated by the seawater corrosion of the easily corroded sample to the passivated metal sample during the test of the easily corroded sample. After the test device is put into the sea, the test box 4 is pulled upward by the buoyancy of the top floating ball 1 and the test box floating ball 3, and is pulled downward by the weight of the steel counterweight 14, so that the test box 4 is perpendicular to the four-kilometer-deep seawater. The explosion valve 30 is automatically opened, the seawater enters the inside of the stainless steel shell 32 from the water inlet 29, a deep water retention environment is caused, and the in-situ electrochemical test, the crevice corrosion test, the galvanic corrosion test and the pitting corrosion test are carried out. After the test is completed, the test device is put into the sea, the test box is located in the four-kilometer-deep seawater, and after the test is completed, the first connecting rope is released by the releaser, the test box is floated upward under the action of the buoyancy of the top floating ball and the test box floating ball, then the test box is controlled to rise to the three-kilometer-deep seawater through the second connecting rope, and the test is continued. In this way, after the test box is in the three-kilometer-deep seawater for a certain period, the second connecting rope is released by the releaser, the test box continues to float upward under the action of the buoyancy of the top floating ball and the test box floating ball, the test box is controlled to rise to the two-kilometer-deep seawater through the third connecting rope, and the test is continued. After the test box is in the two-kilometer-deep seawater for a certain period, the third connecting rope is released by the releaser, the test box continues to float upward under the action of the buoyancy of the top floating ball and the test box floating ball, the test box is controlled to rise to the one-kilometer-deep seawater through the fourth connecting rope, and the test is continued. During the test, the natural environment data and the in-situ electrochemical corrosion data of the sample at different test positions in the deep sea are tested and stored in real time by the pressure monitoring module, the temperature monitoring module, the PH monitoring module, the salinity monitoring module, the dissolved oxygen monitoring module and the in-situ electrochemical test module arranged in the pressure-resistant shell 43, and the data are stored by the data automatic storage module. After processing and analysis, the relationship between the deep-sea natural environment factors and the material electrochemical corrosion law can be obtained, a method and a way for in-depth analysis of the material corrosion mechanism and prediction of the material corrosion rate are provided, and the practicability of the equipment is improved.

[0039] The test depth is adjusted according to the test requirements; the top floating ball 1, the test box floating ball 3, the anchor chain 13, the steel counterweight 14, the in-situ electrochemical sample mechanism 25, the crevice corrosion sample 26, the galvanic corrosion sample 27 and the pitting corrosion sample 28 of the simulated variable-depth and variable-period deep water retention environment corrosion exposure test device are purchased on the market, and the technical personnel in the industry only need to install and operate according to the attached instruction manual, without the creative labor of the technical personnel in the field.

[0040] The above only describes the preferred embodiments of the present application, and it should be pointed out that for ordinary technical personnel in the technical field, several improvements and modifications can be made without departing from the technical principles of the present application, and these improvements and modifications should be considered as the protection scope of the present application.

Claims

1. A corrosion exposure test apparatus simulating a variable depth, variable period deep water retention environment comprising an anchor chain (13) and a steel weight (14); characterised in that, The height adjusting mechanism is installed at the bottom of the test mechanism, the steel counterweight (14) is installed at the bottom of the height adjusting mechanism through the anchor chain (13); The steel counterweight (14) counterbalances the height adjusting mechanism, the height adjusting mechanism adjusts the height of the test mechanism, the test mechanism respectively performs in-situ electrochemical test, crevice corrosion test, galvanic corrosion test and pitting corrosion test on multiple samples, and collects test data; The test mechanism includes a top floating ball (1), a hanging rope (2), a test box floating ball (3), a test box (4) and a data automatic collection and storage device (5), the test box floating ball (3) is installed at the bottom end of the top floating ball (1) through the hanging rope (2), the test box (4) is installed at the bottom end of the test box floating ball (3), and the data automatic collection and storage device (5) is installed on the test box (4); The height adjusting mechanism includes a first connecting rope (6), a second connecting rope (7), a third connecting rope (8), a fourth connecting rope (9), multiple groups of floating ball connecting rope storage boxes (10), a releaser floating ball (11) and a releaser (12), the top ends of the first connecting rope (6), the second connecting rope (7), the third connecting rope (8) and the fourth connecting rope (9) are installed at the bottom of the test box (4), the bottom ends of the first connecting rope (6), the second connecting rope (7), the third connecting rope (8) and the fourth connecting rope (9) are installed on the releaser (12), the releaser floating ball (11) is installed on the releaser (12), the bottom end of the releaser (12) is connected with the top end of the anchor chain (13), and the multiple groups of floating ball connecting rope storage boxes (10) are respectively installed on the first connecting rope (6), the second connecting rope (7), the third connecting rope (8) and the fourth connecting rope (9).

2. An apparatus for simulating corrosion exposure in a variable depth, variable period deep water retentive environment as defined in claim 1 wherein, The test box (4) comprises two groups of round iron rings (21), a plurality of test box connecting ropes (22), a plurality of groups of bolted connecting rings (23), water-tight joints (24), a blasting valve (30), a stainless steel shell (32) and a test frame (33), the top of the stainless steel shell (32) is provided with a top cover, the water-tight joints (24) are all mounted on the top cover, the plurality of groups of bolted connecting rings (23) are respectively mounted on the top end and the bottom end of the stainless steel shell (32), the plurality of test box connecting ropes (22) are divided into two groups, each group has three test box connecting ropes (22), one end of the three test box connecting ropes (22) in the top group is connected with the top round iron ring (21), the other end of the three test box connecting ropes (22) in the top group is respectively connected with the plurality of groups of bolted connecting rings (23) at the top, one end of the three test box connecting ropes (22) in the bottom group is connected with the bottom round iron ring (21), the other end of the three test box connecting ropes (22) in the bottom group is respectively connected with the plurality of groups of bolted connecting rings (23) at the bottom, and the plurality of groups of bolted connecting rings (23) at the top and the plurality of groups of bolted connecting rings (23) at the bottom are all distributed in a triangular shape, the test frame (33) is mounted in the interior of the stainless steel shell (32), and the stainless steel shell (32) is in a cylindrical shape, the in-situ electrochemical sample mechanism (25), the crevice corrosion sample (26), the galvanic corrosion sample (27) and the pitting corrosion sample (28) are all mounted in the interior of the test frame (33), and the blasting valve (30) is mounted on the top of the stainless steel shell (32), and the bottom of the blasting valve (30) is provided with a ball valve (31), and the top end of the blasting valve (30) is provided with a water inlet (29).

3. An apparatus for simulating corrosion exposure in a variable depth, variable period deep water retentive environment as defined in claim 1 wherein, The data automatic acquisition and storage device (5) comprises a support frame (42), a pressure-resistant shell (43) and a fixing plate (44), the support frame (42) is mounted on the stainless steel shell (32) through the fixing plate (44), the pressure-resistant shell (43) is mounted in the interior of the support frame (42), and the interior of the pressure-resistant shell (43) is provided with a pressure monitoring module, a temperature monitoring module, a PH monitoring module, a salinity monitoring module, a dissolved oxygen monitoring module, an in-situ electrochemical test module and a data automatic storage module.

4. An apparatus for simulating corrosion exposure in a variable depth, variable period deep water retentive environment as defined in claim 2 wherein, The in-situ electrochemical sample mechanism (25) comprises a wire (51), a circular ring plastic tube (52), an epoxy resin (53) and an in-situ electrochemical sample (54), the in-situ electrochemical sample (54) is mounted in the circular ring plastic tube (52) through the epoxy resin (53), the top of the circular ring plastic tube is provided with a fixing hole, one end of the wire (51) is connected to the in-situ electrochemical sample (54), and the other end of the wire (51) is connected with the pressure-resistant shell (43) through a water-tight plug.

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