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首页> 外文会议>Annual Symposium on Quantitative Nondestructive Evaluation; 19980719-24; Snowbird,UT(US) >DETECTION AND QUANTIFICATION OF INTERGRANULAR CORROSION AROUND WING SKIN FASTENERS USING THE DRIPLESS BUBBLER ULTRASONIC SCANNER
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DETECTION AND QUANTIFICATION OF INTERGRANULAR CORROSION AROUND WING SKIN FASTENERS USING THE DRIPLESS BUBBLER ULTRASONIC SCANNER

机译：使用无泡起泡器超声波扫描仪检测和量化机翼固定件周围的颗粒间腐蚀

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Corrosion in all its forms is detrimental to the structural integrity of an aircraft and the ability to detect and evaluate the extent of corrosion is of great importance to the airline maintenance community. The U.S. Air Force intends to extend the use of its transport aircraft well beyond their initial design lifetime and therefore has a need for nondestructive inspection (NDI) methods capable of corrosion detection and quantification. One area of concern in these aging aircraft is the corrosion originating from ferrous wing skin fasteners, particularly that which has progressed just beyond the perimeter of the fastener head but not yet visible as exfoliated material. In 1997, ARINC, Inc.examined several NDI techniques for the Air Force Air Logistics Center in Oklahoma City, OK (OC-ALC) in an effort to identify those methods that demonstrate a high probability of detection (POD) and low probability of false alarms (POFA). Electromagnetic, ultrasonic and thermal techniques were applied to wing skin material samples containing corrosion around the fastener countersink. This paper describes the results from scanning electron microscopy examinations of the materials and corrosion product, the results of the ARINC trials and additional tests for ARINC using the Dripless Bubbler ultrasonic scanner. We also describe the rationale behind the setup and data processing scheme used so successfully with the Dripless Bubbler ultrasonic scanner in the ARINC trials. The Dripless Bubbler has since been selected as the primary candidate for wing skin fastener corrosion inspection at the OC-ALC.
机译：各种形式的腐蚀都损害了飞机的结构完整性，而检测和评估腐蚀程度的能力对航空公司的维修界至关重要。美国空军打算将运输飞机的使用范围扩展到其最初的设计寿命之外，因此需要一种能够进行腐蚀检测和量化的无损检查（NDI）方法。在这些老化的飞机中，一个令人关注的领域是源自铁制机翼蒙皮紧固件的腐蚀，特别是腐蚀已经发展到刚好超过紧固件头部的周长，但仍未看到脱落的材料。 1997年，ARINC，Inc.检查了俄克拉荷马州俄克拉荷马市空军空中物流中心（OC-ALC）的几种NDI技术，以期确定那些具有高检测概率（POD）和低虚假概率的方法警报（POFA）。电磁，超声和热技术被应用于机翼蒙皮材料样品，这些样品包含紧固件埋头孔周围的腐蚀。本文描述了材料和腐蚀产物的扫描电子显微镜检查结果，ARINC试验结果以及使用无滴漏式超声波扫描仪对ARINC进行的其他测试的结果。我们还将描述在ARINC试验中使用Dripless Bubbler超声波扫描仪成功使用的设置和数据处理方案背后的原理。此后，无滴漏器已被选为OC-ALC机翼蒙皮紧固件腐蚀检查的主要候选人。

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