I. Introduction:

Salt spray test chamber is a device that simulates a diffused system of salt-containing droplets in the atmosphere, designed to test the corrosion resistance of products after surface treatments such as painting, coating, electroplating, cathodic treatment, and rust prevention oil for various materials. It is widely used for salt spray corrosion tests on electronics, electrical appliances, automobiles, motorcycles, hardware, plastics, FPC flexible boards, electroplated products, and more.

II. Specifications:

The following meet the execution standards:

█Salt Spray Test Chamber's Equipment Technical Standards

Manufacturing, performance, safety, and calibration requirements for salt spray test chambers, to ensure that equipment produced by different manufacturers operates under uniform and reliable conditions. The core objective is to guarantee the repeatability and comparability of test results.

Primary international/National equipment standards include:

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

· This is the Chinese National Standard, an authoritative technical specification for the salt spray test chamber equipment itself. It specifies in detail the structure, materials, temperature uniformity, sedimentation, and salt spray particle size of the key technical parameters.

2、IEC 60068-2-11Environmental Testing -2-11Section: TestKaSalt Spray

· The standards of the International Electrotechnical Commission, while primarily a test method standard, its requirements for testing equipment (salt spray cabinet) are also widely regarded as the design and verification benchmark for the equipment.

3、ASTM B117 - Standard Practice for Operating Salt Spray (Fog) Apparatus

· ASTM International standards, the most widely used salt spray test method globally. It explicitly specifies the requirements for the structure, spray system, and temperature control in the "Equipment" section, serving as a guideline that equipment manufacturers must adhere to.

4、ISO 9227Artificial Atmosphere Corrosion Test - Salt Spray Test

· International Organization for Standardization (ISO) standards, andASTM B117Similarly, it serves as both a method standard and includes detailed equipment specifications. Commonly used in European and many international projects.

█Test method standard conducted within a salt spray box

These standards specify how to conduct specific corrosion tests, including sample preparation, solution preparation, testing cycles, and result assessment. Users select different testing methods based on the industry and purpose of their products.

The most common types of salt spray tests and corresponding standards:

1Neutral Salt Spray Test

· Standard Number:ASTM B117, ISO 9227-NSS, GB/T 10125-2021

· Features: The most basic and commonly used test. Used5%Sodium chloride solutionpHValue adjusted to neutral6.5~7.2)，Test temperature is generally35°C。

· Applications: Widely used for rapid corrosion resistance identification of metals and their alloys, metallic coatings, organic coatings, etc.

2Acetate Mist Test

· Standard Number:ISO 9227-AASS, ASTM G85-Annex A1, GB/T 10125-2021

· Features: OnNSSBased on testing, by adding glacial acetic acid, the collected liquidpHThe value is reduced to approximately3.1~3.3Corrosion rateNSSTest faster.

· Application: Primarily used for copper+Nickel+Chrome or Nickel+Chrome and other decorative coatings are also used in accelerated corrosion tests for aluminum alloys.

3Copper Accelerated Acetic Acid Fume Test

· Standard Number:ISO 9227-CASS, ASTM B368, GB/T 10125-2021

· Features: FeaturingAASSOn the basis of the test, copper chloride is then added to further accelerate corrosion. The test temperature is generally...50°CThis is the fastest corroding rate among all salt spray tests.

· Application: Primarily used for copper+Nickel+Chrome plated or nickel plated+Chromium coatings undergo rapid, stringent quality inspections.

4Recirculating Corrosion Test

· This is a more advanced testing concept, which not only includes salt spray, but also incorporates stages like drying, moistening, and condensation, more realistically simulating the dry and wet cycles of the natural environment.

· Standard Specifications:

Automotive Industry:SAE J2333, GM 9540P, VOLVO VCS 1027,1491, Ford CETP 00.00-L-467

· General Standards:ASTM G85, ISO 11997-1, GB/T 20853 / 20854China Standard for Metal Coating Cyclic Corrosion Test

· The results of the cyclic test correlate much better with actual outdoor corrosion than traditional continuous salt spray tests.