Bosun Higgs
N/A
question: will a 1% phosphoric acid containing paint etch my lead keel? Apparently thats strong enough to etch ally and steel but lead?
any chemists on here?
- Thread starter Bosun Higgs
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VicS
Well-Known Member
Check with the manufacturers product data sheet to see if it is suitable for use as primer for lead.
International etch primer is. http://marinestore.co.uk/PDF/international_ds/international_etch.pdf
International etch primer is. http://marinestore.co.uk/PDF/international_ds/international_etch.pdf
vyv_cox
Well-Known Member
It seems counter-intuitive that lead is attacked quite readily by weak acids, whereas it resists strong ones quite well. When copper-lead bearings are corroded in diesel engines it's the lead that disappears due to attack by combustion acid products - sulphurous, carbonic, acetic, nitronic, etc. I could well believe that phosphoric acid would be quite effective as an etchant for lead.
nigelmercier
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I recall something about this from A-Level Chemistry, something about the lead salts of strong acids forming a barrier?
Bosun Higgs
N/A
Thanks Vic but what I want to apply after the etch is a two pack epoxy and they always say you need two pack primers for that. And so far I have been unsuccessful in finding any paint company who does a two pack etch primer who says its good for lead
PCUK
Well-Known Member
Something for the weekend sir?
rib
Well-Known Member
I used to use international etch primer on lead on x ray machines both commercial and medical.but not in a salt water use.
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Bosun Higgs
N/A
Thanks Vic. It is suitable or would be if they still were making it. Apparently stopped 2 years ago thanks to EU " cant let the public have anything the vaguest bit difficult" regulations. There is no substitute
rib
Well-Known Member
try a local stove enameller/powder coat company.they should have some
