What is the use of corrosive gas test? What are the test standards?

Date：2022-07-22 15:06:02Views：664

Corrosive gas test is used to determine the impact of the indoor environment of work or storage on the corrosion of electrical and electronic product components, equipment and materials, especially contacts and connections. It uses sulfur dioxide, nitrogen dioxide, chlorine, hydrogen sulfide and other gases to accelerate the corrosion of materials or products at a certain temperature and relative humidity, so as to reproduce the damage degree of materials or products within a certain time range. And the process quality comparison of similar protective layers, the protective layers of parts, electronic components, metal materials, electricians, electronics and other products, as well as the corrosion ability of industrial products in mixed gases.

Test purpose and significance:

Most products are used in the atmosphere, and most corrosion occurs in the atmosphere, which contains oxygen, humidity, temperature changes, pollutants and other corrosive components and factors. Atmospheric environment leads to the formation of water film on the metal surface. In the atmosphere, H2S, SO2, NO2, Cl2 and other harmful gases dissolve into the water film formed on the metal surface as corrosive ions, thus accelerating the corrosion process.

Under a certain temperature and humidity environment, use H2S, SO2, NO2, Cl2 and other harmful gases to accelerate the corrosion of materials or products, and reproduce the damage degree of materials or products within a certain time range. It can also be used to assess the gas corrosion resistance of some products by examining the gas corrosion resistance of materials and protective layers and comparing the process quality of similar protective layers.

Test application scope:

Suitable for testing products: automotive parts, automotive electronics, electrical and electronic products and their electronic components, printed circuit board components, lighting appliances, information technology equipment, audio and video equipment, medical equipment, power supply equipment, cable tray, electrical accessories, etc.

The gas corrosion test is based on the following inspection standards:

Gb/t 5170.11-2008 environmental testing equipment for electric and electronic products - inspection methods - corrosive gas testing equipment

Gb/t2423.51-2000 electric and electronic products (Test Ke) flowing mixed gas corrosion test method

IEC 60068-2-60-1995 environmental testing Part 2-60: Test Ke: Flowing mixed gas corrosion test

ISO 16750-4-2006 environmental conditions and tests for electrical and electronic equipment - Climatic Environment

Eia-364-65a-1997 mixed gas corrosion test of electrical connector

Gb2423.51-2000 environmental testing of electrical and electronic products

ASTM b845-97 (2008) mixed flow gas corrosion test