For BS as a dopant, a
low loading of PANI, i.e., 0.5%, gives the best inhibitive properties.
An opposite trend is observed with the LS dopants, especially with
PANI–LS2. The coatings with 0.5% PANI–BS, 1.5% PANI–LS1 and 3%
PANI–LS2 all show about the same protective efficiency: the current
density at Ecorr for the steel coated with these coatings was
decreased by about two orders of magnitude as compared to the
steel coated with the paint without PANI.