  Interactions of heavy quarks, in particular of top quarks, with electroweak
gauge bosons are expected to be very sensitive to new physics effects related
to electroweak symmetry breaking. These interactions are described by the
so-called static form factors, which include anomalous magnetic moments and the
effective weak charges. We compute the second-order QCD corrections to these
static form factors, which turn out to be sizeable and need to be taken into
account in searches for new anomalous coupling effects.
