AN ELECTROANALYTICAL INVESTIGATION OF REACTIONS UNDERGONE BY ELEMENTAL IRON AND COPPER IN THE PRESENCE OF ANAEROBIC ADHESIVE BASED CURE COMPONENTS

The reactions undergone by elemental copper and iron in the presence o f 1-acetyl-2-phenylhydrazine, 1-acetyl-2-phenyldiazine and 1,2,3,4-tet rahydroquinoline based anaerobic adhesive cure systems was investigate d. Polarography was employed to determine the relative rates of genera tion of higher and lower oxidation states of the transition metal ions over time. Transition metal ions, particularly in the lower oxidation state, are vital in the initiation of polymerisation of anaerobic adh esives. It was found that higher concentrations of the lower oxidation state of both iron and copper were generated by adhesive accelerators in combination with saccharin as distinct from maleic acid. (C) 1997 Elsevier Science Limited.