Office of Steam Forum for Model & Toy Steam Gas & Hot Air Engines

I have two new clients, one in the UK and one in the USA, both need replacement D32 boilers as both have rotted away with chronic dezinc.
The new ones will be silver soldered copper boilers and of a heavier gauge construction. It won't start for a while but I will keep you all updated on progress.
Materials are in and design is under way for now.

This will be a very interesting project! I patched the holes on mine since they are hidden under cover, but that is nowhere near as good of a solution as what you've come up with.

Interesting to see this as I've bypassed my D32 boiler for the same reason, chronic rot. They are a right proper b#stard to work on that's for sure. The most complicated steam engine that I have ever mucked around with.

Are D32s more prone to this rot? Wilesco boilers in my experience tend to be pretty good imho.

I think that's what has kept me away from them Jim, it sure would be nice to see a modern day beefier replacement for the D32 boiler issues. looking forward to the progress of this build thread.

I would advise any potential D32 buyer to fully investigate their purchase before paying over the money. I've researched them after taking mine apart and seeing the green rot all over the boiler where Wilesco had soldered them up and it looks like the flux was eventually corrosive on the thin boiler wall. It's such a common occurrence unfortunately with them.
I run mine now off another boiler, so this thread is very interesting for me to follow.

Here's one of the rotted boilers, very porous and leaks like a sieve [ Guests cannot view attachments ] [ Guests cannot view attachments ] [ Guests cannot view attachments ] [ Guests cannot view attachments ]

Yes but poor storage discipline and basic boiler maintenance is a slippery slope.
Drain boilers fully between use, open valves , remove whistles.
Store in a lidded plastic box and put silica gel packs in or a tied up sockfull of uncooked rice in the box. This is essential practice when storing in lofts, cellars, outbuildings etc.
Engines kept in doors usually just need draining drying and left open to vent.

Here's the other one , worst case I've even seen. [ Guests cannot view attachments ]