GB/T 2423.51-2020 in English
VALIDEnvironmental testing—Part 2: Test methods—Test Ke: Flowing mixed gas corrosion test
- Issued on:2020-06-02
- Implemented on:2021-01-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
$243.00
《GB/T 2423.51-2020环境试验 第2部分：试验方法 试验Ke：流动混合气体腐蚀试验》由TC8（全国电工电子产品环境条件与环境试验标准化技术委员会）归口，TC8SC2（全国电工电子产品环境条件与环境试验标准化技术委员会气候环境试验分会）执行，主管部门为国家标准化管理委员会。
Introduction
Analysis of the core content of the standard
| Test method | Gas combination | Copper sheet weight gain requirement (mg/dm²·d) | Typical application scenario |
|---|---|---|---|
| Method 1 | H₂S+NO₂ | 1.0~2.0 | Telecommunication equipment, clean environment |
| Method 2 | Cl₂+H₂S+NO₂ | 0.3~1.3 | Industrial instrument and equipment room |
| Method 4 | Cl₂+SO₂+NO₂ | 1.2~2.4 | Heavy industrial environment |
Key technical requirements
Test equipment:Must be made of glass, PTFE or special stainless steel, the working space volume is recommended to be ≥0.1m³, and the weight gain deviation of the copper sample must be controlled within 15% of the average value.
Severity level:Determined by test method selection (4 methods) and exposure time (4~21 days), with 4d/7d/10d/14d/21d as the five time nodes.
Key points for implementation
There are two test procedures: Procedure 1 is applicable to non-chlorine-free gas, and Procedure 2 is applicable to chlorine-containing gas. Strict unpacking restrictions:
- ＜4 days: no unpacking
- 4-10 days: once allowed
- ＞10 days: once a week
Differences between the old and new standards
Main changes in the 2020 version:
- The weight gain range of copper sheet in Method 2 is adjusted from 0.3~1.0 to 0.3~1.3
- New temperature and humidity negotiation clauses
- The exposure time of copper sheet is changed to the first 4 days and an additional 4 days
- Strengthen the spacing requirements of specimens (≥10mm)
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