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topic 48519

Best material for Heating & Cooling Coils for Acid Tin Bath?

A discussion started in 2008 but continuing through 2019

April 18, 2008

Q. I am doing Acid tin plating. To cool the solution to room temp can I know what is the coil that can be used for the same?

Mahesh M K
plating shop - Bangalore, Karnataka, India


April 18, 2008

A. Hi Mahesh,

Wot acids, wot temperature ?

You've got many choices ....
TFE (expensive),
PVDF (resistant to all acids but doesn't like high pH),
Stainless (metals are best for heat transfer).

freeman newton portrait
Freeman Newton
White Rock, British Columbia, Canada

(It is our sad duty to
advise that Freeman passed away
April 21, 2012. R.I.P. old friend).



May 5, 2008

Q. I am using Sulphuric acid tin bath (conc. 10 % ) along with stannous sulphate and additives for bright finish plating.

Can we coat the titanium tubes with teflon and use it, or SS 316L, or can we use Teflon tubes for cooling the solution?

Regards,

M K Mahesh [returning]
- Bangalore, Karnataka, India


October 2019

A. Hi Mahesh. I expect that titanium would work; if there some history with this that suggests to you that teflon coating is required for titanium tubing?

Regards,

pic of Ted Mooney
Ted Mooney, P.E. RET
finishing.com - Pine Beach, New Jersey
Striving to live Aloha



October 16, 2019 -- this entry appended to this thread by editor in lieu of spawning a duplicative thread

Q. What material should be used for making coil for chilling plant use for keeping temperature low or maintain in acid tin plating which doesn't contaminate or react with tin plating solution?

RAJIV kalyani
- Mumbai/ Maharashtra India


October 2019

A. Hi Rajiv. Although I don't recall using titanium coils with acid tin plating, they have been used with nickel plating, acid zinc plating, and other solutions ... and I'm not seeing a reason they shouldn't be fine for acid tin. Be sure to ground as advised by manufacturer. Advise if anyone feels differently please.

Regards,

pic of Ted Mooney
Ted Mooney, P.E. RET
finishing.com - Pine Beach, New Jersey
Striving to live Aloha


November 6, 2019

A. If it is a fluoborate tin bath, which is unlikely, then do not use titanium.

Lyle Kirman
Consultant - Cleveland Heights

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