I. Introduction:

The Composite Salt Spray Test Chamber, also known as the Cyclic Salt Spray Corrosion Test Chamber or Salt Dry-Wet Corrosion Test Chamber, mimics the natural conditions close to gaps in accelerated corrosion tests, simulating more commonly encountered conditions in the natural environment. It subjects the test samples to conditions several times harsher than those found in nature, including salt spray, drying, moisture, ambient temperature static storage, and spray washing, among others. Tests can be executed in any sequence or individually.

 II. Parameters:

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"Technical Conditions for Salt Spray Test Chamber"

·China's National Standard is the most fundamental and general technical standard for the domestic production and use of salt spray test chambers. 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- Performance Confirmation of Temperature Test Chamber

·IEC Standard, although not specifically written for salt spray chambers, its confirmation methods for temperature uniformity, fluctuations, deviations, etc., are widely cited and serve as a significant basis for evaluating the climatic environmental simulation capability of testing 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 more stringent.GB/T 10587More specifically, it clearly specifies the technical parameters of the test chamber capable of alternating cycles under various conditions such as salt mist, dry, humid heat, and normal temperature storage.

●Main Equipment Specifications:

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

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

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

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

· Corrosive Solution Concentration: Sodium chloride solution concentrationpHValue control.

Environmental Testing Methods Standard

These standards specify how to conduct tests, including test conditions, cycles, sample preparation, and result evaluation. The core value of a composite salt spray test chamber lies in its ability to execute 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 commonly used field)

· Volkswagen (Volkswagen) - PV 1210

· This is a classic salt spray test standard, typically with a cycle of: Salt spray → Dry → Wet-heat cycling.

· Total testing time can reach dozens to hundreds of cycles (such as)40Week/1000(Hours), simulating the corrosion of automotive parts under harsh environmental conditions.

· 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 standard, methods are similar.

· SAE J2334

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

· ISO 11997-1 & 2 Enamel paints and varnishes- 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雾 Testing Standard Practices

· This is one of the most important standards for composite salt spray testing methods. It is for traditional neutral salt spray (ASTM B117On the basis of the aforementioned, multiple appendices have been added, each representing an improved, 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 for 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 humidity and heat test, its test conditions (condensation under saturated humidity) are a key reference for the "humidity and heat" stage in the salt spray cycle.

· JIS D 0205 Corrosion Resistance Test Method for Automotive Parts

· Japanese Industrial Standard, including cyclic corrosion testing.

3Traditional Salt Spray Test Standards (for comparison)

The salt spray test chamber, typically, can also perform these traditional tests, but they are not classified as such.Composite test.

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

· Including neutral salt spray test (NSSAcetate Mist TestAASSAnd Copper Accelerated Acetate Fume TestCASSThese are continuous atomizing sprays, without including alternating stages such as drying or humid conditions.