Corrosion, namely galvanic corrosion, occurs when anodic and cathodic metals make contact. Engineers always take into consideration the right match of metals for use in projects big and small. For example, it's common for roofing contractors to use hot-dipped fasteners, steel fasteners dipped in molten zinc, and for installing roofing materials close to the galvanic scale. Despite acknowledgment of any structural failure, it can't be a learning experience for engineers without testing the failure itself. Root cause analysis, Lescarbeau writes, can identify the failure but not the cause and must be followed by exhaustive testing courtesy of a fastener consulting company such as GT Technical Consultants. By knowing the possible reason for failure, engineers can react accordingly and prevent similar mistakes in future projects by taking the appropriate action. What befell the drone, after all, can happen to virtually anything.
http://boltfailure.com/avoiding-fastener-failure-analysis-can-be-costly-in-the-long-term/
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