Adhesive compositions are disclosed which cure rapidly and completely on
confinement between passive substrates, such as magnesium alloys, that
are deficient in transition metals and transition metal ions. The
compositions include one or more acrylate resins, one or more peroxy free
radical initiators, one or more onium salts, and an accelerator such as
acetylphenyl hydrazine desirably in an amount of about 1.0% or less by
weight of the composition. These compositions provide exceptional bonding
to such substrates without the need for a transition metal primer.
Methods of making and using such compositions are also disclosed.