After pickle wash

[Speedy Builder5Participant @speedybuilder5]

Problem after sulphuric acid pickle

[Speedy Builder5Participant @speedybuilder5]

Using dilute sulphuric acid as a pickle, and copper comes out nice and pink. However after washing in tap water, it turns golden brown with black stains.

Could this be caused by chlorinated tap water ?

[Richard ParsonsParticipant @richardparsons61721]

It could be. Try a first rinse with deionised water – the stuff that is used in irons.

Rdgs

Dick

Edited By Richard Parsons on 14/05/2012 06:34:38

[Speedy Builder5Participant @speedybuilder5]

Just done a pickle and washed in rainwater (not much acid rain where we live). Came out a lot cleaner.

[DMBParticipant @dmb]

Depending on area of the country, maybe it was all the chalk (Alkali) in water, `fighting` the acid.

[julian atkinsParticipant @julianatkins58923]

my method after pickling is then to scrub the boiler in hot soapy water in the domestic sink. the hot soapy water also helps get rid of heated flux deposits. it issurprising what extra muck comes off after such a wash in hot soapy water. the black stains included.

cheers,

julian

Edited By julian atkins on 16/05/2012 11:56:12

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