On Sunday, 24 July 2016 22:40:57 UTC+1, Archibald Tarquin Blenkinsopp wrote:
On Sun, 24 Jul 2016 13:03:11 -0700 (PDT), tabbypurr wrote:
On Sunday, 24 July 2016 17:11:31 UTC+1, GB wrote:

On a practical issue, can you use this acid when the hinges are attached
to the door?


Since I have HCl, I would use it, it's way better, but be most careful to keep it off the wood. Pickling acid eats almost everything, including teeth & eyeballs.

Often hinge screws can be loosened so the hinge sits a little off the wood - then HCl could be used all over.

HCL + Iron oxide = ferric chloride. Not nice, still very corrosive.

but rinses off

Posphoric acid + Iron oxide = iron phosphate, stable solid material.

there's the problem, it sticks to the workpiece but not that well.

As far as the reaction with bits of me goes, I would prefer phosphoric
any day.

For sure Such is diy.

I seem to recollect that Coca Cola was once used for derusting
purposes, no doubt before the company found they could get through the
same number of teeth by reducing the acid levels and upping the sugar.

Might still be worth a try though :-)

I assume it's too weak by far.


NT