Thermochill eaten by vinegar?

[eponymous]

Oh dear, so I noticed this when I was looking at the rads:

http://lh4.ggpht.com/_dctFDUOxwRw/SpMCU4JZyKI/AAAAAAAAES4/_NC1HaEvXsQ/s800/DSC00003-7.JPG

Is that blemish/bump on the corner of the endtank corrosion from the inside or is it something else?

I've not noticed it before, but then again it is small.

When I was doing my vinegar flushes (4.5% acidity) I never left it in for more than 1 hour and that was only one time and I did so much water flushing afterwards. All the other times I left it for 30-45 mins. I didn't notice any green coppery colour to the vinegar but I was getting little flakes of black every now and then. I've heard that these black flakes are common though....or am I mistaken?

I'm very concerned by this :(

[Brad8988]

Have u tried poking it with a nail or something? The metal is pretty thick so guess its just a paint bubble. The end tanks are brass arnt they?

[eponymous]

Have u tried poking it with a nail or something? The metal is pretty thick so guess its just a paint bubble. The end tanks are brass arnt they?

The end tanks are brass I think.

How do paint bubbles form? It seems pretty hard this thing and I don't want to start scratching it in case it breaks it.

[eponymous]

Hmm, I took some of the paint away just to be sure and I don't know what it is. Maybe a blob of solder - it's like a silvery soldery colour :P? What does everyone think?

http://lh4.ggpht.com/_dctFDUOxwRw/SpMI7sDCApI/AAAAAAAAETk/d3Ano5UgzGg/s800/DSC00007-7.JPG
http://lh4.ggpht.com/_dctFDUOxwRw/SpMJDWsXkCI/AAAAAAAAETw/EfTwQaZxEdA/s800/DSC00009-6.JPG
http://lh5.ggpht.com/_dctFDUOxwRw/SpMJHgDnXTI/AAAAAAAAET0/vvJKE3uj9Pk/s800/DSC00010-6.JPG

[mozis]

Its solder imo.

When they are putting a rad together (i.e. soldering it) all the parts get very hot and the solder tends to "pour" all over the place.

I wouldnt worry.

Edit: and to answer your question: there is no way that 40 mins of vinegar bathing dissolved through that brass. im not quite sure but i think it would take months of continous flushing.

[JaD]

Internal corrosion wouldn't produce any kind of bumps, it's probably a blob of some nature.

[iandh]

99.9% sure that's a blob of solder...

[eponymous]

Thanks guys, you've put my mind at ease :)

[HotGore]

I don't know if it is solder, try licking it!

[Waterlogged]

99.9% sure that's a blob of solder...

I'll see your 99.9% and raise you .1%. :p:

[RADCOM]

I don't know if it is solder, try licking it!
Hehehehe reminds me of an episode in men behaving badly when he sniffs and then licks his girlfriends recently removed appendix:rofl:

I don't think it's corroded after that small amount of time with vinegar :)