I. Introduction:

The Composite Salt Spray Cycle Test Chamber, also known as the Composite Salt Test Chamber or Salt Dry-Wet Corrosion Test Chamber, mimics the natural conditions close to gaps in accelerated corrosion tests, replicating situations more commonly encountered in the natural environment. It subjects the test samples to conditions several times harsher than those found in nature, such as salt spray, drying, humidity, ambient static storage, and spraying, allowing for tests to be conducted in any sequence or individually.

II. Parameter Table:

Equipment Performance & 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 10587-2006"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 stipulates 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- Performance Confirmation of Temperature Test Chamber

·IEC Standards, though not specifically written for salt spray chambers, their confirmation methods for temperature uniformity, fluctuations, and deviations are widely referenced, and are a crucial basis for evaluating the climate simulation capability of testing chambers.

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

· China's machinery industry standards, specifically formulated for the composite salt spray test chamber, are more stringent.GB/T 10587More specifically, it clearly stipulates the technical specifications of the test chamber capable of alternating cycles under various conditions such as salt spray, dryness, humidity, and room temperature storage.

●Key Equipment Specifications:

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

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

· Temperature fluctuation: The up and down change of temperature at a certain point, usually 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 tests are conducted, including test conditions, cycles, sample preparation, and result evaluation. The core value of the 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 Cycles.

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

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

The corrosion test standard in Ford's laboratory also employs 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 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 Color paint 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 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 and more rigorous cyclic test.

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

· Additional appendices are tailored to various application scenarios.

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

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

· DIN 50017 Condensation Water Climatic 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 Standard, including cyclic corrosion testing.

3Traditional Salt Spray Test Standard (for comparison)

The Salt Spray Test Chamber can typically perform these traditional tests as well, but they do not fall under the "composite" tests.

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

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