ASTM B827-05(2014)
传导混流气 (MFG) 的环境试验的标准实施规程
Standard Practice for Conducting Mixed Flowing Gas &40;MFG&41; Environmental Tests
ASTM B827-05(2014) 发布历史
ASTM B827-05(2014)由美国材料与试验协会 US-ASTM 发布于 2005。
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ASTM B827-05(2014) 发布之时，引用了标准
- ASTM B542 有关电触点及其使用的标准术语
- ASTM B765 电沉积镀层和相关金属镀层孔隙率试验的选择
- ASTM B808 用石英晶体微量天平监测室内大气腐蚀的标准试验方法
- ASTM B810 通过铜片质量变化校准大气腐蚀试验室的标准试验方法
- ASTM B825 金属试样上表面薄膜的电量(库仑)缩减标准试验方法
- ASTM B826 用电阻探头监测大气腐蚀试验的标准试验方法
- ASTM B845 电触点混合流动气体（MFG）试验标准指南
- ASTM D1193 试剂水(联邦试验方法No.7916)
- ASTM D2914 大气中二氧化硫含量的标准试验方法(韦斯特-盖克法)
- ASTM D3449 工作场所大气中二氧化硫的试验方法（高氯酸钡法）
- ASTM D3464 用热风速仪测定管道中平均速度的标准试验方法
- ASTM D3609 使用渗透管校准技术的标准实施规程
- ASTM D3824 用化学发光法连续测定周围环境或工作场所空气中氮的氧化物含量的标准试验方法
- ASTM D4230 利用冷却表面浓缩(露点)湿度计测定湿度的方法
- ASTM E902 检查X射线光电子能谱仪工作特性的标准实施规程
- ASTM G91 使用硫酸化极板技术检测大气中的二氧化硫
2 的标准操作规程
ASTM B827-05(2014)的历代版本如下：
- 2020年 ASTM B827-05(2020) 进行混合流动气体（MFG）环境试验的标准实施规程
- 2005年 ASTM B827-05(2014) 传导混流气 (MFG) 的环境试验的标准实施规程
- 2009年 ASTM B827-05(2009)e2 进行混合流动气体（MFG）环境试验的标准实施规程
- 2005年 ASTM B827-05(2009)e1 传导混流气(MFG)的环境试验的标准实施规程
- 2005年 ASTM B827-05 传导混流气(MFG)环境试验的标准实施规程
- 1997年 ASTM B827-97(2003) 传导混流气(MFG)的环境试验的标准实施规程
- 1997年 ASTM B827-97 传导混流气(MFG)的环境试验的标准实施规程
4.1 Mixed flowing gas (MFG) tests are used to simulate or amplify exposure to environmental conditions which electrical contacts or connectors can be expected to experience in various application environments (1, 2).4
4.2 Test samples which have been exposed to MFG tests have ranged from bare metal surfaces, to electrical connectors, and to complete assemblies.
4.3 The specific test conditions are usually chosen so as to simulate, in the test laboratory, the effects of certain representative field environments or environmental severity levels on standard metallic surfaces, such as copper and silver coupons or porous gold platings (1, 2).
4.4 Because MFG tests are simulations, both the test conditions and the degradation reactions (chemical reaction rate, composition of reaction products, etc.) may not always resemble those found in the service environment of the product being tested in the MFG test. A guide to the selection of simulation conditions suitable for a variety of environments is found in Guide B845.
4.5 The MFG exposures are generally used in conjunction with procedures which evaluate contact or connector electrical performance such as measurement of electrical contact resistance before and after MFG exposure.
4.6 The MFG tests are useful for connector systems whose contact surfaces are plated or clad with gold or other precious metal finishes. For such surfaces, environmentally produced failures are often due to high resistance or intermittences caused by the formation of insulating contamination in the contact region. This contamination, in the form of films and hard particles, is generally the result of pore corrosion and corrosion product migration or tarnish creepage from pores in the precious metal coating and from unplated base metal boundaries, if present.
4.7 The MFG exposures can be used to evaluate novel electrical contact metallization for susceptibility to degradation due to environmental exposure to the test corrosive gases.
4.8 The MFG exposures can be used to evaluate the shielding capability of connector housings which may act as a barrier to the ingress of corrosive gases.
4.9 The MFG exposures can be used to evaluate the susceptibility of other connector materials such as plastic housings to degradation from the test corrosive gases.
4.10 The MFG tests are not normally used as porosity tests. For a guide to porosity testing, see Guide B765.
4.11 The MFG tests are generally not applicable......
- 标准号
- ASTM B827-05(2014)
- 发布
- 2005年
- 发布单位
- 美国材料与试验协会
- 替代标准
- ASTM B827-05(2020)
- 当前最新
- ASTM B827-05(2020)
- 引用标准
- ASTM B542 ASTM B765 ASTM B808 ASTM B810 ASTM B825 ASTM B826 ASTM B845 ASTM D1193 ASTM D2914 ASTM D3449 ASTM D3464 ASTM D3609 ASTM D3824 ASTM D4230 ASTM E902 ASTM G91