On Sat, 8 Nov 2008 14:58:28 -0600, "LLBrown"
wrote:

Here is what goes on.... I bend a thin wall brass tube to shape then I have
to melt the bending medium out of the pipe with a torch. This causes a
black scaling to show up on the outside of the pipe. To remove this I dip
the pipe in a 50/50 mix of muratic acid and water. This in turn plates the
pipe with very thin copper that I have to buff off.

I know the acid is leaching copper and plating later pipes but what is the
science behind this? Why does it plate?

LLB in Laredo

Its not plating.....hint..what is brass made of?

Which of the two metals is being removed by the acid?

Gunner

Political Correctness is a doctrine fostered by a delusional,
illogical liberal minority, and rabidly promoted by an
unscrupulous mainstream media, which holds forth the
proposition that it is entirely possible to pick up a turd by the clean end.