Amine compounds are quite commonly used as corrosion inhibitors. The nitrogen atoms in amines have a lone-pair of electrons on them which are free to form chemical "bonds" (adsorption?) with the surface of clean metal. In doing so they create a barrier resisting (to a good extent) further chemical attack.
.
hexamine is not the newest amine inhibitor, but it is easy to buy. It works when pickling steel in hydrochloric and sulfuric acid, with the addition of 2%.Amine compounds are quite commonly used as corrosion inhibitors. The nitrogen atoms in amines have a lone-pair of electrons on them which are free to form chemical "bonds" (adsorption?) with the surface of clean metal. In doing so they create a barrier resisting (to a good extent) further chemical attack.
Yep, good 'ole citric has done a good job on those vices, and it's so safe and cheap
Nope usually wipe it with a cloth but thats more to remove any black dirt than anything else, doesnt get parts fully dry.
Eons ago, before the dawn of time and the creation of OSHA (Occupational Health and Safety Administration), I was still in high school and worked part time for a small family business that manufactured custom transformers and rebuilt electric motors and generators, etc. We used to clean and de-rust parts by dropping them into vats of boiling caustic soda. Very dangerous, and I don't recall anyone wearing any kind of protective gear.
These days, OSHA would absolutely s**t a brick if they saw that. Luckily, no one ever had an accident, and ironically perhaps, the owner, old Mr. **** lived well into his 90s and was still working full time.
Perhaps calcium citronate if the water is hard
Is it pale yellow or could it be green - as in ferrous? I use ferrous sulphate a lot to kill moss and sometimes see very pale, insoluble deposits in the bottom of the sprayer after use; not sure what they are, but look a bit like the crud I sometimes see in old, used citric solution. Anyway, citric acid is destroyed in the process of destroying rust, so has a finite lifetime.
