I. Introduction:

The Humidity and Temperature Salt Spray Cyclic Test Chamber, also known as the Cyclic Salt Spray Corrosion Test Chamber and Salt Dry-Wet Corrosion Test Chamber, mimics the natural conditions closest to gaps in accelerated corrosion tests. It simulates more commonly encountered conditions in the natural environment and subjects the test to conditions several times harsher than the natural environment, including salt spray, drying, moistening, room temperature static, and spray washing, among others. Tests can be executed in any order or individually.

II. Specifications:

Equipment Performance and Technical Standards

These standards specify the requirements that composite salt spray test chambers 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 universal technical standard for the domestic production and use of salt spray cabinets. It specifies the operating conditions, technical requirements, testing methods, and inspection rules for the salt spray test chamber.

2. IEC 60068-3-5 Environmental Testing- Chapter3-5Partial: Supporting Documents and Guidelines- Temperature Test Chamber Performance Verification

·IEC International Standards, although not specifically written for salt spray chambers, their confirmation methods for temperature uniformity, fluctuation, deviation, etc., are widely referenced and are an important basis for evaluating the climatic environment simulation capability of test chambers.

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

· China's mechanical industry standards, specifically formulated for composite salt spray test chambers, are...GB/T 10587More specifically, it clearly defines the technical specifications of a test chamber capable of alternating cycles of salt spray, drying, humid heat, and storage at normal temperature.

●Main Equipment Specifications:

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

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

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

· Salt雾沉降率：At1.0~2.0ml/80cm²·hBetweenGBStandard).

· Corrosion Solution Concentration: Sodium chloride solution concentration andpHValue control.

Environmental Test Methods 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 to be 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, typically with a cycle of: Salt Spray → Dry → Wet Heat Cycles.

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

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

The Ford laboratory corrosion test standard also employs a cyclic test with multiple environments, including salt spray, drying, and static storage.

· General Motors (General Motors) - GMW 14872

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

· SAE J2334

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

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

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

2International Standard

· ASTM G85 Improved Salt Spray Testing Standard Practices

· This is one of the most important standards for the composite salt spray test method. It is based on traditional neutral salt spray (ASTM B117On the basis of the previous content, multiple appendices have been added, each representing a modified, more severe cyclic test.

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

· Other appendices are tailored to various application scenarios.

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

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

· DIN 50017 Condensation Water Climate Test

Although primarily a humid heat test, its test conditions (condensation under saturated humidity) are an important reference for the "humid heat" 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 Standard (for comparison)

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

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

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