The use of a barrier or isolator between the aluminum and steel is recommended due to the galvanic effect of having the two dissimilar metals in contact. This tape prevents the galvanic corrosion between the two materials. Invictus Corrosion Protection Tape, self-adhesive tape for preventing galvanic corrosion in metal. Available on 18.3m rolls in widths from 25mm up to 1150mm, with custom sizes made to order. Invictus Tapes are proudly designed and manufacture in the UK.