了解混合流动气体测试

Mixed flowing 气体 (MFG) testing is an accelerated environmental corrosion aging test that provides contact with harsh chemical pollutants commonly found in the atmosphere. The test specifically evaluates the corrosion of electrical components due to exposure to atmospheric 气体ses and contaminants.

为什么要进行混合流动气体测试?

Mixed flowing 气体 testing allows manufacturers to test for the build-up of corrosion that leads to the reduced performance of electrical components, providing an accelerated environment to determine a product’s life span as well as identify potential failure points. These results allow manufacturers to reduce premature wear and liability. 

及时通知测试 is frequently used in conjunction with procedures which evaluate contact or connector electrical performance, such as measurement of electrical contact resistance before and after MFG exposure. 

例如, this method can establish if faults such as: pore corrosion, 边缘效应, 边缘蠕变趋势, 镀层覆盖, 电镀的完整性, and “sheltering” effect exist within the contact area.

测试 plays a key role in product development, 质量控制, and evaluating the risk of the premature corrosion of parts across the automotive, 航空航天, consumer products and medical device industries. Taking the automotive industry as an example, products which might require 及时通知测试 include exterior products such as tail light assemblies and engine bay products such as steering pumps and vehicle control modules.

MFG测试包括什么? 

及时通知测试 simulates the real-world corrosion from environmental exposure conditions in a highly controlled environmental chamber. 温度(°C), 相对湿度(%RH), and concentration of 气体eous pollutants and other essential variables, 如气流和容积交换率, 都是仔细定义的, 监控, and controlled in the chamber to evaluate how a product will perform under various conditions. 

With distinct 气体eous pollutants dominating in different field environments, im体育APP’s team of experts can simulate virtually any environment at its Seattle-based mixed flow 气体 testing facilities, controlling not only the multiple-气体 atmospheres at the parts per billion (ppb) level but also the temperature and humidity for the desired time limit.

Gases commonly used in the test are chlorine (Cl2), 硫化氢, 二氧化硫(SO2), 和二氧化氮(NO2). The concentration of each 气体 is controlled in the chamber to the parts per billion using mass flow meters. 

im体育APP has recently expanded its 及时通知测试 capabilities with the introduction of an additional environmental chamber, doubling capacity and significantly increasing the volume to allow for much larger units to be tested. Its facilities comprise one of the largest chambers available within an independent testing house at 106” L x 72” W x 78” H (595k cubic inches) with a second smaller chamber of 25” L x 27” W x 52” H (35k cubic inches) also available for 及时通知测试. 

im体育APP按照什么标准进行测试?

最常见的测试标准是:

• ASTM B827 - 05(2014) Standard Practice for Conducting Mixed Flowing Gas (MFG) 环境 Tests
• ASTM B845 - 97(2018) Standard Guide for Mixed Flowing Gas (MFG) Tests for Electrical Contacts
• IEC 60068-2-60方法4

Most OEM specific standards usually reference IEC 60068-2-60 including Ford, FCA(菲亚特克莱斯勒), 约翰迪尔, 大众汽车, 通用汽车和戴姆勒公司.

What preparations are required for mixed flowing 气体 test?

To prepare for testing, it is important to:

• 确保不损坏设备
• 确保设备无腐蚀
• 制定决策标准(通过/失败)
• Determine pre/post function check procedure

详细的规格和样品尺寸, 以及任何潜在的危险, 比如电池, 需要在测试前提供.

问题?

Manufacturers frequently need advice and support for mixed flowing 气体 testing in the Design Validation (DV) and 产品ion Validation (PV) process. Our experts will work with manufacturers to recommend a detailed test plan to enable them to evaluate how a product will perform in its intended storage or operating (field) environment and provide valuable expertise in overcoming potential problems.

For more information on mixed flowing 气体 testing, please 今天就联系im体育APP专家.