I. Introduction:

The Composite Salt Spray Test Chamber, also known as the Recirculating Salt Spray Corrosion Test Chamber or Salt Dry-Wet Corrosion Test Chamber, simulates the natural conditions close to gaps in the environment commonly encountered in nature, accelerating corrosion testing under conditions several times harsher than those of the natural environment. It incorporates tests such as salt spray, dryness, humidity, static storage at room temperature, and sprinkling, which can be executed in any sequence or individually.

II. Specifications:

Equipment Performance and Technical Standards

These standards specify the requirements that a composite salt spray test chamber must meet in terms of manufacturing, performance, and safety, serving as the foundation for evaluating whether a device is qualified. Common equipment standards include:

1、GB/T 10587-2006"Salt Spray Test Chamber Technical Conditions"

· China's national standard is the most fundamental and general technical standard for the production and use of salt spray boxes domestically. It stipulates the operating conditions, technical requirements, testing methods, and inspection rules for salt spray test chambers.

2. IEC 60068-3-5 Environmental Testing- No Chinese content provided for translation.3-5Partial: Supporting Documents and Guidelines- Performance Confirmation of Temperature Test Chamber

·IEC standards, although not specifically written for salt spray chambers, are widely referenced for their confirmation methods regarding temperature uniformity, fluctuation, deviation, etc., which are crucial for evaluating the climatic environment simulation capability of test chambers.

3、JB/T 13209-2017 Salt Spray Test Chamber

· China's mechanical industry standards, specifically formulated for composite salt spray test chambers, are...GB/T 10587More specifically, it clearly stipulates the technical parameters of the test chamber that can undergo alternating cycles of salt spray, drying, humid heat, and ambient temperature storage conditions.

●Key Equipment Specifications:

· Temperature Range: Room Temperature~+70° or wider.

· Temperature Uniformity: The difference in temperature among various points within the box, typically required to be ≤2℃。

· Temperature Fluctuation: The up and down change of temperature at a certain point, typically required to be ≤ ±0.5℃。

· Salt Spray Deposition Rate: In1.0~2.0ml/80cm²·hBetweenGBStandard).

· Corrosive Solution Concentration: Sodium Chloride Solution ConcentrationpHValue control.

Environmental Test Method Standard

These standards specify how to conduct tests, including test conditions, cycles, sample preparation, and result evaluation. The core value of the composite salt spray test chamber lies in its ability to perform these complex cyclic corrosion testing methods.

●Please provide the Chinese content you would like translated into American English.Here are some globally recognized and widely used core testing methods and standards:

1、Automotive Industry (Most Common Field)

· Volkswagen (Volkswagen) - PV 1210

· This is a classic composite salt spray test standard, with a cycle typically consisting of: Salt Spray → Dry → Wet Heat Cycles.

· Total testing time can reach dozens to hundreds of cycles (such as)40Zhou/1000Simulates the corrosion conditions of automotive parts under severe environments (hours).

· Ford (Ford Motor Company) - CETP 00.00-L-467

The corrosion test standards in Ford's laboratory also employ a multi-environmental alternating cycle test, including salt spray, drying, and static storage.

· General Motors (General Motors) - GMW 14872

· GM's cyclic corrosion laboratory test standards, methods similar.

· SAE J2334

· Developed by the Society of Automotive Engineers (SAE), it is an industry-standard laboratory cyclic corrosion test, referenced or adopted by many automakers.

· ISO 11997-1 & 2 Color paint and varnish- Determination of resistance to cyclic corrosion conditions

· International standards, widely used for corrosion resistance evaluation in the coatings industry.

2International Standard

· ASTM G85 Improved Standard Practices for Salt雾 Testing

· This is one of the most important standards for the composite salt spray test method. It involves traditional neutral salt spray testing.ASTM B117Based on that, multiple appendices have been added, each representing a modified, more rigorous cyclic test.

AppendixA5Cyclic acidic salt spray test, commonly used in the automotive industry, simulating environments such as deicing salt.

· Additional appendices are tailored to various application scenarios.

· ISO 14993 Corrosion Test- Test under cyclic exposure to salt spray, "dry" and "wet" conditions

· This is an international standard specifically for composite salt spray testing, providing standardized cyclic conditions.

· DIN 50017 Condensate Water Climate Test

Although primarily a湿热 test, its test conditions (condensation under saturated humidity) are an important reference for the "湿热" stage in the salt spray cycle.

· JIS D 0205 Corrosion Resistance Test Methods for Automotive Parts

· Japanese Industrial Standards, including cyclic corrosion testing.

3Traditional Salt Spray Test Standards (for comparison)

Composite salt spray test chambers can usually perform these traditional tests as well, but they do not belong toComposite test.

· GB/T 10125-2021 / ISO 9227:2017 Artificial Atmosphere Corrosion Test - Salt Spray Test

· Including neutral salt spray testNSSAcetate Mist TestAASSAnd copper-accelerated acetate mist testCASSThese are continuous spray systems, without including alternating stages such as drying or humidification.