Some aircraft manufacturers and operators have attempted to control in-service corrosion by the use of water-displacing organic inhibitors which can be either brushed or sprayed onto corrosion-susceptible areas of the structure. However, because of the low surface tension and lubricating properties of these preparations, concern has been expressed as to their potential side-effects on the fatigue performance of bolted and riveted joints. Fatigue tests were carried out in repeated tension under both constant-amplitude and multiload-level sequences on several types of 6-bolt double-lap joint specimens of 2024-T3 alclad aluminum alloy sheet. Contrary to the findings of previous investigations into the effect of inhibitors on riveted joints, the two corrosion inhibitors used were found, in general, to have either no effect or a beneficial effect on the fatigue lives of bolted joints, it is concluded that the specific effects of a water-displacing organic corrosion inhibitor on fatigue strength of joints are likely to be dependent on the type of joint, its configuration and on the severity of the load spectrum involved.
The influence of water-displacing organic corrosion inhibitors on the fatigue behaviour of 2024-T3 alclad aluminium alloy botted joints
Wirkung wasserverdraengender, organischer Korrosionsinhibitoren auf das Ermuedungsverhalten von Schraubverbindungen aus 2024 T3 Alclad Aluminiumlegierung
US Government Reports ; Jan ; 1-44
1982
44 Seiten
Report
English
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