LISUN High-Temperature Salt Spray Test Chamber-Core Equipment and Technological Innovation Practice in Corrosion Resistance Testing

1. Introduction
1.1 Research Background and Significance
In industrial production and practical applications, metal materials and various products are often exposed to the erosion of chlorine-containing environments such as marine atmosphere and industrial waste gas. Chloride ions in salt spray can easily penetrate the oxide layer and protective coatings on the material surface, triggering electrochemical reactions and leading to material corrosion failure. Statistics show that global industrial losses caused by salt spray corrosion account for 3%-5% of the total output value of the manufacturing industry. Over 40% of product failures in automotive, electronic, aerospace and other industries are related to salt spray corrosion. Against this background, the high-temperature salt spray test chamber, which can accurately simulate salt spray corrosion environments, has become a core equipment in the industrial testing field. Through accelerated corrosion tests, it can quickly identify material protection defects and product structural design vulnerabilities, providing a scientific basis for enterprises to reduce R&D costs and improve product reliability.
1.2 Overview of LISUN High-Temperature Salt Spray Test Chamber
As a professional manufacturer of environmental testing equipment, LISUN has developed the High-Temperature Salt Spray Test Chamber (core model YWX/Q-010), which has been applied in the market for more than 10 years. With stable performance and comprehensive standard compatibility, it has become the preferred testing equipment for many enterprises. The equipment can realize multiple test modes such as Neutral Salt Spray (NSS), Acetic Acid Salt Spray (ASS) and Copper-Accelerated Acetic Acid-Salt Spray (CASS). With a working chamber volume of 480L, it can meet the testing needs of samples of different sizes. Its core function is to simulate extreme salt spray corrosion environments by precisely controlling parameters such as temperature and salt spray deposition rate, providing standardized test conditions for the corrosion resistance assessment of materials and products.
1.3 Research Purpose and Methods
This paper aims to systematically elaborate on the technical principles and core advantages of the LISUN High-Temperature Salt Spray Test Chamber, and verify its practicality and scientificity in material corrosion resistance testing by combining its application cases in various industries. The research methods mainly include principle analysis based on equipment technical parameters, compliance analysis combined with international and domestic standards, and effect verification of practical application cases in multiple industries, comprehensively demonstrating the core value of the equipment in industrial testing.

2. Working Principle and Core Technical Characteristics of LISUN High-Temperature Salt Spray Test Chamber
2.1 In-depth Analysis of Working Principle
The core working logic of the LISUN High-Temperature Salt Spray Test Chamber is to realize accelerated corrosion testing of samples by artificially simulating salt spray corrosion environments, and its principle can be divided into three key links:
Salt spray generation and regulation: Compressed air prepared by the customer (inlet pressure ≥0.4Mp) is sent to the equipment after two-stage pressure regulation at a spray pressure of 0.07-0.17Mp, mixed with sodium chloride solution in the brine tank (volume 32L), and atomized by the nozzle to form uniform salt spray. The equipment supports three spray modes: continuous, intermittent and programmable. The salt spray deposition rate is strictly controlled at 1-2ml/80cm²/h (average value of 16-hour test), complying with international standard requirements.
Precise temperature control: The temperature range of the test chamber’s working chamber is ambient temperature to +55℃, and the temperature range of the saturation tank is ambient temperature to +70℃. High-precision control with temperature uniformity ≤2℃ and temperature fluctuation ≤±0.5℃ is achieved through a dual temperature control system. The heating and filtration design of the saturation tank can reduce nozzle crystallization and ensure salt spray stability.
Corrosion environment simulation: By adjusting the test type (NSS/ASS/CASS) and cycle mode, marine (high humidity, high salinity) or industrial (containing acidic pollutants) salt spray environments are simulated. Chloride ions in high temperature and high humidity conditions accelerate the penetration of the sample’s protective layer, triggering corrosion reactions, thereby reproducing the corrosion state of the sample that would take several years in the natural environment in a short time.
2.2 Core Technical Characteristics
Comprehensive standard compatibility: The LISUN High-Temperature Salt Spray Test Chamber strictly complies with more than 20 international and domestic standards such as GB/T2423.17, GB/T10125, IEC 60068-2-11, ASTM-B117 and ISO 9227. The test results are widely recognized and can meet the compliance testing needs of automotive, electronic, military and other industries.
Reliable safety protection design: The equipment is equipped with multiple safety devices such as low water level alarm, dual over-temperature protection (mechanical + electronic) and low air pressure alarm, which effectively avoid equipment damage or test failure caused by abnormal conditions such as water shortage and over-temperature, ensuring the safety and stability of the test process.
Flexible sample adaptation capability: The working chamber size is 1200800500mm, and the sample placement space can reach 1000600300mm. It is equipped with a combined sample rack of V-shaped groove and O-shaped round bar (angle 20°±5°), supporting customization of special samples. The load-bearing can be configured according to actual needs, adapting to various test objects such as metal components, electronic components and coating samples.
Convenient operation and maintenance: It adopts a stainless steel gas spring-assisted lid opening method, which is labor-saving to operate. The standard configuration includes sodium chloride reagent, plastic rust-proof bucket, spare nozzle, etc., reducing maintenance costs. The equipment has loose operating environment requirements (ambient temperature 5℃~30℃, humidity ≤80%Rh) and does not require special laboratory conditions.

3. Multi-industry Application Practice of LISUN High-Temperature Salt Spray Test Chamber
3.1 Automotive Industry: Key Testing for Vehicle Durability
Automobiles are prone to salt spray corrosion on body coatings and chassis components in marine climates and winter deicing salt environments. An automotive manufacturer used the LISUN High-Temperature Salt Spray Test Chamber (YWX/Q-010) to conduct a Neutral Salt Spray (NSS) test on zinc-plated bolts of the vehicle body in accordance with GB/T10125 standard for 720 consecutive hours. The test results showed that the unimproved bolts developed pitting corrosion after 480 hours, while the samples with adjusted coating thickness could withstand 720 hours without obvious corrosion. Based on this, the enterprise optimized the production process, improving the corrosion resistance of vehicle chassis components by 50% and reducing the incidence of after-sales failures. This application fully reflects the core role of the high-temperature salt spray test chamber in automotive component selection and process improvement.
3.2 Electronic Industry: Core Means to Improve Electronic Product Reliability
Electronic components (such as connectors and circuit boards) are prone to pin corrosion and decreased insulation performance in high-humidity and salt spray environments. An electronic enterprise used the LISUN High-Temperature Salt Spray Test Chamber to conduct a Copper-Accelerated Acetic Acid-Salt Spray (CASS) test on a new type of waterproof connector in accordance with ASTM-B368 standard at 50℃ for 96 hours. The test found corrosion vulnerabilities at the junction of the connector’s sealing rubber ring and metal shell. The enterprise optimized the sealing structure design, enabling the product to pass a 168-hour CASS test and meet the requirements of marine ship electronic equipment. The precise corrosion simulation capability of the LISUN High-Temperature Salt Spray Test Chamber helped the enterprise quickly locate design defects and shorten the product R&D cycle.
3.3 Light Industry and Metal Processing Industry: Standardized Tool for Coating Quality Control
The corrosion resistance of metal coatings on light industrial products (such as bicycle components and automotive decorative parts) directly affects product appearance and service life. A bicycle manufacturer conducted a Neutral Salt Spray test on chrome-plated handlebars in accordance with QBT 3826 standard using the LISUN High-Temperature Salt Spray Test Chamber, requiring no rust after 240 hours of testing. By testing samples from different suppliers, it was found that the products of a certain supplier had coating peeling after 168 hours. The enterprise promptly replaced the supplier, avoiding mass quality problems. The multi-standard test mode supported by the equipment provides a unified and scientific testing basis for quality control in the light industry.
3.4 Military and Marine Engineering: Extreme Environment Adaptability Verification
Military equipment and marine engineering equipment are long-term exposed to harsh salt spray environments, requiring extremely high corrosion resistance of materials. A military enterprise conducted an Acetic Acid Salt Spray (ASS) test on the shell of a shipborne sensor in accordance with GJB150 standard using the LISUN High-Temperature Salt Spray Test Chamber for 1000 consecutive hours at 40℃. The test results provided key data for the material selection of the sensor shell, ensuring that the equipment can work stably in the marine environment for more than 5 years. The characteristic of the LISUN High-Temperature Salt Spray Test Chamber complying with military standards such as MIL-STD-202 makes it irreplaceable in extreme environment adaptability verification.

4. Core Advantages and Application Value of LISUN High-Temperature Salt Spray Test Chamber
4.1 Scientificity and Reliability of Test Results
By precisely controlling key parameters such as temperature and salt spray deposition rate, the equipment ensures the stability and repeatability of the test environment. The temperature uniformity is ≤2℃, and the fluctuation range of the salt spray deposition rate is controlled within the standard range. The test results can be directly used as a scientific basis for product quality evaluation and material selection. At the same time, its compatibility with more than 20 international and domestic standards makes the test data recognized across industries and borders, helping enterprises’ products enter the international market.
4.2 Efficiency and Flexibility of Test Process
The LISUN High-Temperature Salt Spray Test Chamber supports three test modes: continuous, intermittent and programmable. It can customize test plans according to the corrosion characteristics of different products. Compared with natural environment exposure tests, the test cycle is shortened by more than 90%. For example, the corrosion process that takes 2-3 years in the natural environment can be completed in 1-3 months using this equipment, greatly improving the enterprise’s R&D efficiency and quality control efficiency. In addition, the equipment’s large-volume working chamber and customizable sample rack can meet the diverse testing needs from small electronic components to large mechanical parts.
4.3 Enterprise Cost Control and Competitiveness Improvement
Discovering material protection defects and structural design vulnerabilities in the product design stage through this equipment can avoid quality problems after mass production of products, reducing after-sales maintenance costs and recall risks. At the same time, optimizing material selection and production processes based on test data can improve the corrosion resistance and reliability of products, enhancing the enterprise’s core competitiveness in the market. After using this equipment, an automotive component enterprise reduced the incidence of after-sales corrosion failures from 8% to 1.2%, saving more than 5 million yuan in after-sales costs annually.
4.4 Long-term Stable Operation and Service Support
The LISUN High-Temperature Salt Spray Test Chamber adopts corrosion-resistant materials and mature manufacturing processes, with a service life of 8-10 years. It is equipped with a complete set of safety protection devices, reducing equipment failure rates. The enterprise’s more than 10 years of accumulated after-sales FAQs and engineer service team can promptly solve problems encountered by users during use, ensuring long-term stable operation of the equipment.

5. Conclusions and Prospects
5.1 Research Conclusions
As a professional environmental simulation testing equipment, the LISUN High-Temperature Salt Spray Test Chamber realizes efficient and scientific assessment of the corrosion resistance of materials and products by accurately reproducing salt spray corrosion environments. Its core advantages lie in strong standard compatibility, high test accuracy, flexible and convenient operation, etc. In the application practice of automotive, electronic, military, light industry and other industries, it has fully proven its core role in product R&D, quality control and material selection. The equipment not only provides enterprises with reliable test data support, but also helps enterprises reduce costs and improve product competitiveness, making it a core equipment for corrosion resistance testing in the industrial field.
5.2 Future Development Prospects
With the development of industrial products towards high-end and intelligent directions, the requirements for corrosion resistance testing will continue to increase. In the future, the LISUN High-Temperature Salt Spray Test Chamber is expected to achieve technological upgrades in the following aspects: first, improved intelligence level, integrating IoT technology to realize remote monitoring, automatic data analysis and report generation; second, multi-functional integration, adding test modules such as humidity and heat cycle and sulfur dioxide corrosion to meet the needs of complex corrosion environment simulation; third, energy conservation and environmental protection optimization, reducing equipment energy consumption and consumable consumption by improving the heating system and spray structure. In addition, with the development of emerging industries such as new energy vehicles and offshore wind power, the application scenarios of the high-temperature salt spray test chamber will be further expanded, providing technical support for product reliability assurance in more fields.