I hope we were chatting not arguing!
Not only hulls and their fittings. Alcan, more an advertising gimmick than naval architecture, had aluminium mainmasts built on Northern Venture and Northern Progress. Every out-fitting (Christmas tree etc.), most available in steel or bronze only, of course, insulated from it (if I remember correctly, I had an idea they also had an 'earth' strap between them which does not seem to make good corrosion sense).