Environment-mechanical coupling accelerated corrosion aging climate chamber

Abstract

The present application belongs to the technical field of comprehensive atmospheric environment corrosion test, and particularly relates to an environmental-mechanical coupling accelerated corrosion aging climate chamber capable of in-situ observation, wherein a temperature control system, a humidity control system and an ultraviolet lamp array realize simulation of the climate environment in the chamber through control of a general controller, the temperature, humidity and ultraviolet lamp can be controlled individually or synchronously, a sample loading platform is driven by a displacement control system to move forward, backward, upward, downward and leftward and rightward, and a multiple zoom imaging system is used to observe and shoot the chamber and the test sample; parameters and observation programs are set through an operation interface, so that the sample loading platform is automatically moved in front of the multiple zoom imaging system lens to take pictures regularly; the climate chamber has simple structure, perfect functions, can load multiple stress types and large numbers of test samples, and is flexible and widely applicable in clamp installation and application, and can be used for single function corrosion aging accelerated test such as ultraviolet light aging corrosion test and humid heat corrosion test or multi-factor comprehensive climate environment simulation accelerated test.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of comprehensive atmospheric environment corrosion test, and particularly relates to an environment-mechanical coupling accelerated corrosion aging climate box capable of in-situ observation, which can perform single-function corrosion aging accelerated test such as ultraviolet light aging corrosion test, humid heat corrosion test, or multi-factor comprehensive climate environment simulation accelerated test. BACKGROUND

[0002] Corrosion of materials in the atmospheric environment not only affects the performance of corresponding structures or devices, but also causes environmental pollution and safety accidents, resulting in incalculable economic losses. Establishing a corrosion test station in the marine environment to perform natural environment exposure test is a commonly used corrosion research method in the prior art. Through the marine environment natural exposure test, the corrosion process and corrosion mechanism of different materials in different climate environments can be mastered, and reasonable and reliable design basis can be provided for engineering corrosion prevention design and service life or life prediction of materials in the marine environment. However, the test period is long and the cost is high, which cannot meet the needs of current high-speed updating and replacement of equipment and facilities and rapid development of new materials, and indoor accelerated corrosion test research is gradually favored by the majority of scientific researchers.

[0003] Atmospheric accelerated corrosion test is a test carried out in a laboratory under artificial and / or severe gas corrosion conditions, the basic principle of which is to strengthen the corrosion factors, accelerate the corrosion process, and at the same time strive to meet the natural atmospheric conditions. Chinese Patent No. 102841051A discloses a multi-factor comprehensive climate environment simulation accelerated test device, which comprises a test box body with a sample holder inside, a light source system, an intelligent spraying system, a temperature and humidity adjusting system, a circulating air system and a control system, can simultaneously simulate or strengthen the environmental effects of five environmental factors of light, corrosive medium, temperature, humidity and wind speed, and use PLC or single-chip microcomputer to control the radiation power variation, spraying (or sprinkling), heating (or cooling), wind speed and other actions of the light source, so as to simulate and strengthen various typical climate environments; the intelligent spraying (or sprinkling) control can better control the dry-wet cycle of the sample surface in the test box, improve the acceleration rate and correlation; two different light aging tests and wet heat tests can be carried out respectively, achieving the effect of one box for multiple uses; Chinese Patent No. 218003204U discloses a marine atmospheric environment comprehensive corrosion test box, which comprises a main box body, a secondary box body connected with the main box body, a control cabinet connected with the main box body, a sample support, an ultraviolet corrosion unit, a salt spray corrosion unit, a temperature corrosion unit, a humidity corrosion unit and a sensor unit; the sample support is arranged in the main box body; the ultraviolet corrosion unit is arranged at the top of the main box body; the first and second atomizing nozzles of the salt spray corrosion unit are arranged on the two sides of the sample support respectively; the temperature corrosion unit is arranged at the bottom and side of the sample support; the humidity corrosion unit comprises a humidifier and a dehumidifier; the humidifier is arranged in the main box body; the dehumidifier is arranged in the secondary box body and connected with the inside of the main box body through a pipeline; a controller is arranged in the control cabinet and electrically connected with the sensor unit. Both of them realize the control and strengthening of multiple environmental factors such as light, corrosive medium, temperature, humidity, etc., and have good simulation acceleration effect. However, in many cases, materials are subjected to different types of stress such as tensile, bending and other mechanical loads in actual application service environment, and stress corrosion failure problem is more prominent under the coupling action of high temperature, high salt, high radiation and other harsh climate environmental factors. The atmospheric environment corrosion test box disclosed in the above patent documents does not consider the influence of stress, and when observing the test sample, the test sample must be taken out of the box, which will affect the internal environment control and further affect the reliability of the simulation test results, especially when confirming the material corrosion aging behavior evolution process and damage mechanism, the test personnel need to take samples frequently for observation and send them to the laboratory for microscopic morphology analysis, which is time-consuming and laborious.

[0004] Therefore, it is necessary to develop and design an environment-mechanical coupling accelerated corrosion aging climate chamber, which can load different types of stress on the test material while observing the surface of the test material in situ without opening the box, and has positive social and economic benefits. SUMMARY

[0005] The present application aims at overcoming the defects of the prior art, and develops an environmental-mechanical coupling accelerated corrosion aging climate chamber which can in-situ observe the surface of test materials, controls and strengthens key environmental factors while loading different kinds of stresses, and realizes the simulation and acceleration of atmospheric corrosion environment.

[0006] In order to achieve the above-mentioned purpose, the main structure of the environmental-mechanical coupling accelerated corrosion aging climate chamber comprises a multiple zoom imaging system, a displacement control system, a temperature control system and a humidity control system arranged in the chamber, a sample loading platform arranged on the displacement control system, and a general controller connected with the multiple zoom imaging system, the displacement control system, the temperature control system and the humidity control system.

[0007] The multiple zoom imaging system is packaged in the door of the chamber, the display screen is arranged on the outer wall of the door, the lens is surrounded by an ultraviolet lamp array, the lens and the ultraviolet lamp array are opposite to the sample loading platform, the ultraviolet lamp array is also connected with the general controller, and the general controller is arranged outside the chamber.

[0008] The main structure of the sample loading platform comprises a base and a plurality of groups of clamps connected with the base; a plurality of threaded holes are arranged on the base in a straight line or in an array, the clamps are arranged in the threaded holes, each group of clamps is composed of at least two chuck assemblies, the bending stress loading clamp further comprises a force applying screw rod, the upper part of the chuck assembly is a structure for applying bending, tensile or torsional stress, and the lower part is a screw rod.

[0009] The inner wall of the door body is made of heat insulation and waterproof material, which avoids the conduction of harsh climate conditions in the box body to the inside of the door body, causing damage to the multiple zoom imaging system; the multiple zoom imaging system is an optical or electronic imaging system, supporting multiple magnification observation, having photographing, video recording and automatic storage functions, and copying internal photos and videos through an external storage interface, which is isolated from the internal environment of the box body, a miniature air pump and a displacement sensing sensor are installed around the lens, the air inlet / outlet of the miniature air pump is close to and aligned with the surface of the lens, and the local air flows quickly on the surface of the lens, effectively avoiding lens fogging and ensuring observation effect; the displacement sensing sensor includes a radar or infrared positioning sensor, which emits an alarm sound and immediately stops the displacement control system from moving the sample carrier when the distance between the sample carrier and the lens exceeds the set value during the translation of the sample carrier, preventing the lens from being damaged by bumping with the test sample; the displacement control system has a motor, a steering bearing / rod and other key components, which can drive the sample carrier to translate in up, down, left, right, front and back directions according to the instructions of the general controller, and during the test, the test sample on the sample carrier can be moved in front of the lens of the multiple zoom imaging system without opening the box, the distance between the test sample and the lens can be adjusted to realize clear imaging of the test sample at different magnifications; when observing and photographing, the general controller can identify and save the position of the test sample on the sample carrier, the relative position between the test sample and the lens, and the imaging magnification, and set the observation interval and frequency through the operation interface and the general controller, so that the test sample can be automatically moved to the set position in front of the lens at regular intervals, and the photographing is performed at the set magnification, realizing the functions of in-situ observation and photographing without frequent opening of the box for sampling and photographing; the temperature control system heats or cools according to the instructions of the general controller, so that the internal temperature of the box changes in the set range; the humidity control system humidifies or dehumidifies according to the instructions of the general controller, so that the internal humidity of the box changes in the set humidity range; the ultraviolet lamp array controls the number of ultraviolet lamps, the radiation angle and the intensity according to the instructions of the general controller, simulates and strengthens the sunlight in the box; the sample carrier bears multiple groups of test samples of different types (including bending, stretching and torsion) and different stresses, the sample carrier is assembled in a modular way, the base is a stainless steel thick plate, the lower edge of the upper part of the "C" shaped structure of the chuck assembly is provided with a convex ball structure, the head of the force screw is a ball structure, and the chuck assembly and the force screw are fixed on the base through threaded holes, forming a sample carrier with mechanical loading function; during use, one or more stress loading clamps are selected and fixed on the sample carrier at the same time to realize synchronous test of multiple groups of test samples of different types, which can be disassembled and replaced at any time, and the application is flexible; meanwhile, the internal spacing of a matched clamp can be adjusted

[0010] The chuck assembly at both ends is fixed in threaded holes with different intervals on a straight line, so that test samples of different sizes are loaded, and the application range is larger; the total controller has a man-machine interaction window: an operation interface, through which instructions for controlling the temperature control system, the humidity control system and the operation of the ultraviolet lamp array are input, so that the internal environmental parameter setting of the box and the test program setting are realized.

[0011] When the environmental-mechanical coupling accelerated corrosion aging climate box is tested, the environmental parameters including the temperature and humidity values, the ultraviolet light intensity and angle, the opening of each environmental parameter control module, the running time and the cycle / timing operation program are set through the operation interface; the total controller controls the temperature control system, the humidity control system and the operation of the ultraviolet lamp array according to the instruction information input by the operation interface, so that the maintenance and / or change of the environmental parameters such as the temperature, the humidity and the ultraviolet light in the box are realized.

[0012] Compared with the prior art, the temperature control system, the humidity control system and the ultraviolet lamp array realize the simulation of the climate environment in the box through the control of the total controller, the temperature, the humidity and the ultraviolet lamp can be controlled individually or synchronously, the sample loading table is driven by the displacement control system to move forward and backward, up and down and left and right, and the multi-telephoto imaging system observes and photographs the inside of the box and the test sample; the parameters and the observation program are set through the operation interface, so that the sample loading table is automatically moved in front of the lens of the multi-telephoto imaging system for photographing at regular time, the functions of the complex climate environment simulation strengthening and the synchronous loading of multiple types of stress and in-situ observation are realized, the single function corrosion aging accelerated test such as the ultraviolet light aging corrosion test and the hot and humid corrosion test or the multi-factor comprehensive climate environment simulation accelerated test can be carried out, the application range is wide, the material atmospheric environment corrosion aging accelerated test research is suitable, the atmospheric corrosion aging damage mechanism is helpful for in-depth research, the test cycle is shortened, and technical support is provided for atmospheric corrosion protection research; the structure is simple, the function is perfect, multiple types of stress can be loaded, the sample quantity is large, the fixture installation and application are flexible, and the applicability is wide. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is a schematic diagram of the main structure principle of the application.

[0014] Figure 2 It is a schematic diagram of the main structure connection of the application.

[0015] Figure 3 It is a schematic diagram of the structure principle of the sample loading table related to the application. CONCRETE IMPLEMENTATION METHOD

[0016] The application will be further described below in combination with the drawings and the concrete implementation method.

[0017] Example 1

[0018] The main structure of the environment-mechanical coupling accelerated corrosion aging climate chamber relates to the present embodiment, comprising a cabinet 1, a multiple zoom imaging system 2, a displacement control system 3, a temperature control system 4, a humidity control system 5, an ultraviolet lamp array 6, a sample loading platform 7 and a general controller 8; the multiple zoom imaging system 2 is encapsulated in the door body 101 of the cabinet 1, the displacement control system 3, the temperature control system 4 and the humidity control system 5 are arranged in the inside of the cabinet 1, the display screen 201 of the multiple zoom imaging system 2 is located on the outer wall of the door body 101, the ultraviolet lamp array 6 is arranged around the lens 202, the lens 202 and the ultraviolet lamp array 6 are opposite to the sample loading platform 7 arranged on the displacement control system 3, the multiple zoom imaging system 2, the displacement control system 3, the temperature control system 4, the humidity control system 5 and the ultraviolet lamp array 6 are connected with the general controller 8 arranged outside the cabinet 1 respectively, the general controller 8 has an operation interface 801, the operation interface 801 is a man-machine interaction window, including a touch screen.

[0019] The main structure of the sample loading platform 7 relates to the present embodiment, comprising a base 701, a threaded hole 702, a chuck assembly 703, a force screw 704 and a protrusion 705; a plurality of threaded holes 702 are arranged on the rectangular block structure of the base 701, the threaded holes 702 are used for installing clamps, the clamp is composed of two chuck assemblies 703 and one force screw 704, the chuck assembly 703 is an integrated structure, the upper part is a “C” shaped structure, the lower part is a screw, the lower edge of the upper part of the “C” shaped structure is provided with a protrusion 705 in a spherical structure, the head of the force screw 704 is in a spherical structure.

[0020] The width of the “C” shaped structure relates to the present embodiment, the opening direction of the two “C” shaped structures is opposite, and the height is the same.

[0021] The environment-mechanical coupling accelerated corrosion aging climate chamber relates to the present embodiment, when in use:

[0022] According to the test requirements, a certain number of clamps are installed on the base 701 through the cooperation of the screw of the chuck assembly 703, the force screw 704 and the threaded hole 702, the two ends of the test sample 10 are placed in the opening of the “C” shaped structure of the chuck assembly 703 and contact with the upper surface of the protrusion 705, the middle part corresponds to the top of the force screw 704, the force screw 704 is screwed into the bottom of the test sample 10 and the test sample 10 is extruded, and the three-point bending stress is applied to and maintained on the test sample 10;

[0023] By pressing or long-pressing the physical keyboard of the operation interface 801, the moving step and speed are set, and the relevant instructions are transmitted to the general controller 8. The general controller 8 controls the displacement control system 3 to move the sample stage 7 in the set direction step by step or continuously until the front of the lens 202 of the multi-magnification imaging system 2. At different magnifications, the morphology of the test sample 10 and the internal situation of the box 1 can be clearly observed through the display screen 201. The general controller 8 saves the information of the position of the test sample 10 on the sample stage 7, the relative position of the test sample 10 and / or the sample stage 7 and the lens 202, and the imaging magnification in any observation and photographing state. By setting the observation interval and frequency through the operation interface 801, the test sample 10 is automatically moved to the fixed position in front of the lens 202 at regular intervals to take pictures according to the set magnification, realizing in-situ observation and photographing without frequent opening of the box for sampling and photographing.

[0024] In addition, fixing the two chuck assemblies 703 in the two threaded holes 702 at different intervals can test test samples 10 of different lengths. Installing multiple sets of bending mechanical loading clamps or other types of mechanical loading clamps (such as stretching, twisting, etc.) on the base 701 can realize the synchronous test of multiple test samples 10 of different types of stress.

Claims

1. An environmental-mechanical coupled accelerated corrosion aging climate chamber, the main structure of which includes a multi-zoom imaging system, a displacement control system, a temperature control system, and a humidity control system installed inside the chamber; a sample stage installed on the displacement control system; and a main controller connected to the multi-zoom imaging system, the displacement control system, the temperature control system, and the humidity control system respectively; characterized in that, The multi-zoom imaging system is encapsulated within the door of a housing, with its display screen located on the outer wall of the door. An array of ultraviolet lamps surrounds the lens, and the lens and lamps face the sample stage. The lamps are connected to a central controller located outside the housing. This multi-zoom imaging system is either optical or electronic, supporting multiple magnifications and featuring photo, video, and automatic storage functions. Internal photos and videos can be copied via an external storage interface. It is isolated from the internal environment of the housing. A miniature air pump and a displacement sensor are installed around the lens. The air pump's inlet / outlet is close to and aligned with the lens surface, causing rapid local airflow over the lens. The displacement sensor, including radar or infrared positioning sensors, detects when the distance between the test sample on the sample stage and the lens exceeds a set value during sample stage translation, triggering an alarm. An alarm sounds and, via the main controller, stops the displacement control system from moving the sample stage. The displacement control system, comprising key components including a motor and steering bearings / rods, moves the sample stage horizontally, vertically, left, right, forward, and backward according to the main controller's instructions. Without opening the chamber, it moves the test sample on the stage in front of the lens of the multi-magnification imaging system. By adjusting the distance between the test sample and the lens, it takes pictures of the test sample at different magnifications. The temperature control system heats or cools the chamber according to the main controller's instructions, maintaining the internal temperature within the set range. The humidity control system humidifies or dehumidifies the chamber according to the main controller's instructions, maintaining the internal humidity within the set range. The UV lamp array controls the number of UV lamps, radiation angle, and intensity according to the main controller's instructions, simulating and enhancing sunlight.

2. The environmental-mechanical coupled accelerated corrosion aging climate chamber according to claim 1, characterized in that, During the test, environmental parameters including temperature and humidity values, ultraviolet light intensity and angle, activation of each environmental parameter control module, running time, and cyclic / timed operation program are set. The main controller controls the operation of the temperature control system, humidity control system, and ultraviolet lamp array to maintain and / or change the environmental parameters inside the chamber.

3. The environmental-mechanical coupled accelerated corrosion aging climate chamber according to claim 1 or 2, characterized in that, The inner wall of the door is made of heat-insulating and waterproof material.

4. The environmental-mechanical coupled accelerated corrosion aging climate chamber according to claim 1 or 2, characterized in that, The main structure of the sample stage includes a base and several sets of clamps connected to it; the base has several threaded holes, and the clamps are installed in the threaded holes. Each set of clamps consists of at least two chuck assemblies. The bending stress loading clamp also includes a force-applying screw. The upper part of the chuck assembly is a structure for applying bending, tensile or torsional stress, and the lower part is a screw.

5. The environmental-mechanical coupled accelerated corrosion aging climate chamber according to claim 1 or 2, characterized in that, The main controller has an operating interface, through which instructions for controlling the operation of the temperature control system, humidity control system and ultraviolet lamp array are input, and the internal environmental parameters and test procedures of the chamber are set and configured.

6. The environmental-mechanical coupled accelerated corrosion aging climate chamber according to claim 2, characterized in that, During observation and photography, the main controller marks and saves the position of the test sample on the sample stage, the relative position of the test sample and the lens, and the imaging magnification in the current state. The observation interval and frequency are set through the operation interface and the main controller, and the test sample is automatically moved to the set position in front of the lens at regular intervals and photographed according to the set magnification.

7. The environmental-mechanical coupled accelerated corrosion aging climate chamber according to claim 5, characterized in that, The sample stage adopts a modular assembly method to support multiple sets of test samples with different types and stresses. The base is made of thick stainless steel plate with threaded holes arranged in a straight line or in an array. The upper part of the chuck assembly has a "C" shaped structure with a spherical protrusion at the lower edge of the upper part. The head of the force-applying screw has a spherical structure. The chuck assembly and the force-applying screw are fixed to the base through threaded holes. The internal spacing of each set of matching fixtures is adjustable.

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