I. Introduction:

A composite salt spray test chamber, also known as a cyclic salt spray corrosion test chamber or salt dry-wet corrosion test chamber, mimics the natural conditions of corrosion most closely found in gaps, simulating the more common conditions encountered in the natural environment under conditions several times harsher than those of the natural environment.Conduct self-comprehensive tests, such as salt spray, dryness, humidity, ambient temperature storage, and sprayThe spray environment can be self-combined, allowing tests to be conducted in any sequence or individually.

II. Parameters:

Equipment Performance & 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 chambers. 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: Support Documents and Guidelines- Temperature Test Chamber Performance Confirmation

The International Electrotechnical Commission (IEC) standards, although not specifically written for salt spray chambers, are widely referenced for their confirmation methods regarding temperature uniformity, fluctuation, deviation, etc. They are an important basis for evaluating the climate environmental simulation capability of test 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...GB/T 10587More specifically, it clearly stipulates the technical parameters of a test chamber capable of alternating cycles under various conditions such as salt spray, dryness, humidity, and ambient storage.

●Key Equipment Specifications:

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

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

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

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

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

Environmental Test Methods Standard

These standards outline 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 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 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 cycling.

· 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 Motor Company) - CETP 00.00-L-467

The Ford laboratory corrosion test standard also employs a multi-environmental alternating cycle test, including salt spray, drying, and static placement.

· General Motors (General Motors) - GMW 14872

· General Motors cyclic corrosion laboratory test 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 Test Standard Practices

· This is one of the most important standards for composite salt spray testing methods. It is for traditional neutral salt spray tests.ASTM B117On the basis of that, multiple appendices have been added, each representing an improved and 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 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 Testing 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 toComposite test.

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

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