Shelf Life Degradation of Selected Anaerobic Threadlocking Adhesives at Various Storage Temperatures

摘要

This study addresses the shelf life degradation of three commercially available anaerobic adhesives maintained at 0 C, 22 C, and 50 C. A titrimetric procedure was developed to monitor the change in the adhesive peroxide initiator concentration over an 18 month period, The change was then related to a corresponding decrease in the breakaway and prevailing torque strengths of bonded nuts and bolts prepared with aged adhesives. It was determined that elevated temperature storage caused degradation of the adhesives and that the titrimetric method could be useful as a quality control method were such storage may be unavoidable.