Accession Number : ADA118914

Title :   The Influence of Water-Displacing Organic Corrosion Inhibitors on the Fatigue Behaviour of 2024-T3 Alclad Aluminium Alloy Bolted Joints.

Descriptive Note : Structures rept.,

Corporate Author : AERONAUTICAL RESEARCH LABS MELBOURNE (AUSTRALIA)

Personal Author(s) : Machin,A S ; Mann,J Y

PDF Url : ADA118914

Report Date : Jan 1982

Pagination or Media Count : 44

Abstract : 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 multi-load-level sequences on several types of 8-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.

Descriptors :   *BOLTED JOINTS, *RIVETED JOINTS, *ALUMINUM ALLOYS, *CORROSION INHIBITION, *FATIGUE(MECHANICS), FATIGUE LIFE, AUSTRALIA

Subject Categories : Properties of Metals and Alloys
      Couplers, Fasteners, and Joints
      Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE