I've used both virgin and 30% glass-fibre-filled Teflon stock to make fluid-handling parts for sulphuric acid service at all concentrations and fast-ramping temperatures up to 300C w/o problems apart from handling accelerated creep and enormous thermal expansion.
Going that way trades corrosion...
Has anyone any strong knowledge about use of extruded aluminium tanks in 'indirect' wet-type domestic central heating systems?
An arrangement is proposed which uses an extruded and 'mill-finish' aluminium alloy section as a hot water manifold. Probably 6061 T6 or similar. Internal flow...