I. Introduction:

The Humidity and Salt Spray Test Chamber, also known as the Cyclic Salt Spray Corrosion Test Chamber or Salt Dry-Wet Corrosion Test Chamber, is designed to simulate natural conditions that are *closest to the gap in accelerated corrosion testing. It mimics more commonly encountered conditions in the natural environment and tests under conditions that are several times harsher than the natural environment, including salt spray, dryness, humidity, ambient static storage, and spray rinsing, among others. Tests 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 piece of equipment is qualified. Common equipment standards include:

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

·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 chambers.

2. IEC 60068-3-5 Environmental Testing- Chapter3-5Partial: Support Documents and Guides- Performance Confirmation of Temperature Test Chamber

·IEC Standard, although not specifically written for salt spray chambers, its methods for confirming temperature uniformity, fluctuation, and deviation are widely cited. They are a crucial basis for evaluating the climatic environmental simulation capability of testing chambers.

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

· China's machinery industry standards, specifically formulated for composite salt spray test chambers, are more stringent.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 room temperature storage.

●Key Equipment Specifications:

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

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

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

· Salt Spray Deposition Rate:1.0~2.0ml/80cm²·hBetweenGBStandard).

· Corrosion Solution Concentration: Sodium chloride solution concentrationpHValue 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 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 salt spray test standard, with a typical cycle of: Salt Spray → Drying → Wet-Hot Cycles.

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

· Ford (Ford automobiles) - CETP 00.00-L-467

The corrosion test standards in Ford's laboratory also employ a cyclic test method that includes salt spray, drying, and static conditions, among other environments.

· 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 automotive manufacturers.

· 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 Spray Test Standard Practices

· This is one of the most important composite salt spray test methods standards. It is based on traditional neutral salt spray (ASTM B117On the basis of the previous version, 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 standard 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)

The Salt Spray Test Chamber can usually perform these traditional tests as well, but they are not consideredComposite test.

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

· Including Neutral Salt Spray Test (N.S.S.T.)NSSAcetate Mist TestAASSAnd copper accelerated acetate mist testCASSThese are continuous spray systems; they do not include alternating stages such as drying or humidification.