Never heard of nicotine causing a corrosion problem.
Did suffer excessive tar build up on the outflow valve seal and surrounds, on the DC9.
Meant a filthy cleaning job every night as it obviously gave us pressurisation problems now and again. Thank heavens we went "non smoking"!
Season Greetings to all our learned readers.
Sleeve.
PS. ......and ,yes, 411, have had to use the DV window to depressurise as well.