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CN-122016627-A - Salt fog simulation test cabinet

CN122016627ACN 122016627 ACN122016627 ACN 122016627ACN-122016627-A

Abstract

The invention discloses a salt spray simulation test cabinet, and belongs to the technical field of environment simulation test equipment. The test cabinet comprises a main body frame system, an environment simulation system, a fluid circulation system, a sample management system and an intelligent control system, wherein the main body frame system is provided with a test cabin body with a double-layer heat insulation structure and an inflatable sealing door, the environment simulation system comprises a multi-mode spray tower capable of generating salt mist with different particle sizes and spraying modes, the temperature and humidity control module is composed of PTC heating, compressor refrigerating, electrode humidifying and rotating wheel dehumidifying, the fluid circulation system comprises a salt solution circulation unit with concentration monitoring and an air treatment unit with corrosive gas injection, the sample management system comprises a rotating sample frame with adjustable angles, an on-line monitoring unit with integrated image, potential and weighing functions, and the intelligent control system is used for centralized control. The invention supports various test modes such as cyclic corrosion, compound simulation, dynamic spraying and the like, realizes the automation of the test process and the in-situ monitoring of the sample state, and improves the authenticity, accuracy and efficiency of corrosion test.

Inventors

  • DAI SHENG
  • Xia Xunzhong
  • YIN SHU
  • HAN GUOFENG
  • LI HUALIN

Assignees

  • 成都环泰睿诚科技有限公司

Dates

Publication Date
20260512
Application Date
20260407

Claims (9)

  1. 1. Salt fog simulation test cabinet, characterized by includes: The main body frame system comprises a test cabin (1) with a double-layer structure, an observation window (2) arranged on the front surface of the test cabin (1) and a sealing door (3) positioned on one side; the environment simulation system is arranged in the test cabin (1) and is used for generating and regulating and controlling a test environment and at least comprises a multi-mode spray tower and a temperature and humidity control module; A fluid circulation system in fluid communication with the environmental simulation system for providing and processing saline and air required for the test, comprising at least one saline circulation unit and one air handling unit; The sample management system is rotatably arranged inside the test cabin (1) and is used for bearing and monitoring a test sample and at least comprises a rotary sample rack and an online monitoring unit; and the intelligent control system is electrically connected with the environment simulation system, the fluid circulation system and the sample management system and is used for controlling a test flow and collecting data.
  2. 2. The salt spray simulation test cabinet according to claim 1, wherein the test cabin (1) comprises: An inner layer plate made of corrosion-resistant polypropylene, an outer layer plate made of stainless steel, and a layer of heat insulating material (4) filled between the inner layer plate and the outer layer plate; the edge of the sealing door (3) is provided with an annular inflatable sealing strip (5), and the inflatable sealing strip (5) is connected to a pressure-controllable air source.
  3. 3. A salt spray simulation test cabinet according to claim 1, characterized in that the multi-mode spray tower comprises an ultrasonic atomizing unit (6) for generating fine salt spray of micron order, an air pressure atomizing unit (7) for generating salt spray of conventional particle size, and a centrifugal atomizing unit (8) for generating salt spray of controllable direction and intensity, the outlet pipes of the ultrasonic atomizing unit (6), the air pressure atomizing unit (7) and the centrifugal atomizing unit (8) being selectively connected with a common spray outlet (10) through a three-way electromagnetic valve (9).
  4. 4. The salt spray simulation test cabinet according to claim 1, wherein the temperature and humidity control module comprises a PTC ceramic heater (11) arranged on the inner wall of the test cabin body (1), a compressor refrigerating unit (12) communicated with the outside of the test cabin body (1), an electrode type steam humidifier (13) and a rotary dehumidifier (14).
  5. 5. A salt spray simulation test cabinet according to claim 1, wherein the salt solution circulation unit comprises a main liquid storage tank (15), a concentration sensor (16) for detecting the concentration of a solution in real time is arranged in the main liquid storage tank, a magnetic drive circulation pump (17) connected with an outlet of the main liquid storage tank (15), and a multistage filter (18) connected to an outlet pipeline of the circulation pump (17).
  6. 6. A salt spray simulation test cabinet according to claim 1, wherein the air treatment unit comprises an oil-free air compressor (19), an air saturator (20) connected to the outlet of the air compressor (19) for heating the compressed air to a predetermined temperature, and a CO 2 /SO 2 mixing device (21) connected to the outlet of the air saturator (20) for dosing corrosive gas into the gas stream.
  7. 7. A salt spray simulation test cabinet according to claim 1, characterized in that the rotary sample holder comprises a rotary main shaft (22) driven by a servo motor and arranged vertically, a sample holder (23) arranged in multiple layers along the axial direction of the rotary main shaft (22), and an angle adjusting mechanism (24) connected between the sample holder (23) and the rotary main shaft (22), wherein the angle adjusting mechanism (24) can enable the sample holder (23) to tilt relative to a horizontal plane within a range of 15 ° to 90 °.
  8. 8. The salt spray simulation test cabinet according to claim 1, wherein the on-line monitoring unit comprises a high-definition camera (25) fixed on the inner wall of the test cabin (1), a lens of the high-definition camera is directed to the rotary sample holder, a corrosion potential sensor (26) arranged on at least one sample holder (23), and a high-precision weighing module (27) integrated below the sample holder (23).
  9. 9. The salt spray simulation test cabinet according to claim 1, wherein the intelligent control system comprises an industrial programmable logic controller PLC (28) serving as a core controller, a data acquisition module (29) connected with the PLC (28) and used for acquiring environmental parameters, and a remote monitoring interface (30) supporting remote communication.

Description

Salt fog simulation test cabinet Technical Field The invention relates to the technical field of environment simulation test equipment, in particular to a salt spray simulation test cabinet. Background Salt spray corrosion is an important test means for evaluating corrosion resistance of materials, coatings and products. Conventional salt spray test cabinets are generally capable of performing only a single, static salt spray test (e.g., neutral salt spray test NSS, acetate salt spray test AASS, etc.), with fixed and single test conditions. However, the corrosion process in real environments is often the result of multi-factor dynamic coupling effects, such as temperature cycling, dry-wet alternation, salt spray concentration fluctuations due to diurnal or seasonal variations, and synergism of corrosive gases such as SO 2、CO2 present in the industrial atmosphere. The prior salt spray test equipment has the following technical defects: the test mode is single, namely, only salt spray under constant conditions can be realized, the Cyclic Corrosion Test (CCT) comprising alternate stages of drying, wetting, salt spray and the like cannot be simulated, and the composite environment with synchronous changes of temperature, humidity, salt spray and corrosive gas cannot be simulated. The control precision and flexibility are not enough, the granularity of the salt fog is single, the spraying direction and strength are not adjustable, and the salt fog deposition conditions under different wind speeds and wind directions are difficult to simulate. The temperature and humidity control response is slow, and the precision is limited. Sample management is extensive, namely a sample frame is usually fixed, so that test conditions of different parts of a sample or different samples are not uniform, the real-time and in-situ monitoring capability of the corrosion state of the sample is lacking, and a test result depends on final appearance inspection or weight loss measurement and process data are missing. The automation and the intelligent degree are low, the test flow depends on manual setting and monitoring, the data record is discontinuous, and the automatic execution and the remote monitoring of the complex dynamic test program can not be realized. Therefore, the high-precision salt spray simulation test equipment which can integrate multiple environmental factors, realize dynamic simulation, automatic control and on-line monitoring is developed, and has important significance for improving the accuracy, reliability and efficiency of corrosion test. Disclosure of Invention The invention aims to overcome the defects of the prior art and provide a salt spray simulation test cabinet and a dynamic circulation test method, which can highly simulate a real complex corrosion environment, realize multi-mode programmable high-precision dynamic test and have advanced sample management and real-time monitoring functions. In order to achieve the aim, the salt spray simulation test cabinet comprises a main body frame system, an environment simulation system, a fluid circulation system, a sample management system and an intelligent control system, wherein the main body frame system comprises a test cabin body with a double-layer structure, an observation window arranged on the front face of the test cabin body and a sealing door arranged on one side of the observation window, the environment simulation system is arranged inside the test cabin body and is used for generating and regulating a test environment and at least comprises a multi-mode spray tower and a temperature and humidity control module, the fluid circulation system is in fluid communication with the environment simulation system and is used for providing and processing salt solution and air required by testing, the salt solution circulation system and the air treatment unit are at least arranged inside the test cabin body in a rotatable mode, the sample management system is used for bearing and monitoring a test sample and at least comprises a rotary sample rack and an on-line monitoring unit, and the intelligent control system is electrically connected with the environment simulation system, the fluid circulation system and the sample management system and is used for controlling a test flow and collecting data. Preferably, the test cabin comprises an inner layer plate made of corrosion-resistant polypropylene, an outer layer plate made of stainless steel and a heat insulation material layer filled between the inner layer plate and the outer layer plate, and an annular inflatable sealing strip is arranged at the edge of the sealing door and connected to a pressure-controllable air source. Preferably, the multi-mode spray tower comprises an ultrasonic atomization unit for generating micron-sized fine salt mist, an air pressure spray unit for generating salt mist with conventional particle size, and a centrifugal spray unit for generating salt mist with controllable dir