ISO 4524的本部分规定了进行混合流动气体（MFG）环境试验的程序，包括: 暴露在受控数量的腐蚀性气体混合物中。 它描述了所需的设备和气体、温度和湿度控制方法，使测试能够 以可复制的方式进行。通过使用对照试样测量再现性 腐蚀膜通过质量增益、库仑法或各种电子和X射线束分析进行评估 技术。再现性也可以通过使用电阻或电阻的现场腐蚀速率监测器来测量 质量频率变化法。 制造试验可用于: _评估新型电接触金属化对环境暴露导致的降解的敏感性 测试腐蚀性气体； _评估连接器外壳的屏蔽能力，该外壳可作为腐蚀性气体进入的屏障 气体； _评估其他连接器材料（如塑料外壳）对试验降解的敏感性 腐蚀性气体。 制造商试验通常不包括: _用作孔隙率测试（有关孔隙率测试的指南，请参阅ISO 10308，金属涂层-孔隙率审查 测试）； _适用于失效机制不是污染气体腐蚀的情况，例如镀锡可分离材料 联络。

This part of ISO 4524 provides procedures for conducting mixed flowing gas (MFG) environmental tests involving exposures to controlled quantities of corrosive gas mixtures. It describes the required equipment and the methods for gas, temperature and humidity control that enable tests to be conducted in a reproducible manner. Reproducibility is measured through the use of control coupons the corrosion films of which are evaluated by mass gain, coulometry or by various electron and X-ray beam analysis techniques. Reproducibility can also be measured by in situ corrosion rate monitors using electrical resistance or mass frequency change methods. MFG tests can be used to: _ evaluate novel electrical contact metallization for susceptibility to degradation due to environmental exposure to the test corrosive gases; _ evaluate the shielding capability of connector housings that may act as a barrier to the ingress of corrosive gases; _ evaluate the susceptibility of other connector materials such as plastic housings to degradation from the test corrosive gases. MFG tests are not normally: _ used as porosity tests (for guidance on porosity testing, see ISO 10308, Metallic coatings — review of porosity tests); _ applicable where the failure mechanism is other than pollutant gas corrosion such as in tin-coated separable contacts.