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 of gaps in accelerated corrosion testing, simulating the more common conditions found in the natural environment. It subjects the test samples to conditions several times harsher than those in the natural environment, including salt spray, drying, humidity, ambient temperature storage, and spray rinsing, among others. Tests can be performed in any sequence or individually.

II. Parameters:

Equipment Performance & Technical Specifications

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 general technical standard for the domestic production and use of salt spray boxes. It specifies the operating conditions, technical requirements, testing methods, and inspection rules for salt spray test chambers.

2. IEC 60068-3-5 Environmental Testing- Chapter3-5Partial: 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 methods of confirming temperature uniformity, fluctuation, deviation, etc., which are crucial in assessing the climatic environmental simulation capability of testing chambers.

3、JB/T 13209-2017 Composite 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 capable of alternating cycles under various conditions such as salt spray, dryness, humidity, and storage at normal temperature.

●Key Equipment Specifications:

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

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

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

· Salt fog sedimentation rate:1.0~2.0ml/80cm²·hBetweenGBStandard).

· Corrosive 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 a salt spray test chamber lies in its ability to perform these complex cyclic corrosion testing methods.

●Please provide the Chinese content to be translated.Here are some globally recognized and widely used core testing method 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 → Dry → Wet Heat Cycle.

· Total testing time can reach dozens to hundreds of cycles (such as)40Week/1000(Hours), simulating the corrosion of automotive parts under severe 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 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 Color 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 Enhanced Salt雾 Test Standard Practices

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

· 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 standard cyclic conditions.

· DIN 50017 Condensation 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 Standard (for comparison)

Compound 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 test (NSSAcetate Mist TestAASSAnd Copper Accelerated Acetate Mist TestCASSThese are continuous spray systems, without including alternating stages such as drying or humidification.