The problem of rust is relevant for most metal products. Get rid of it can be quite difficult. Especially when it comes to cleaning corrosion in hard-to-reach places. For example, on the thread of parts and hardware. There are many ways to get rid of harmful growth, but not all of them are equally good.
Manual cleaning
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Manual cleaning of threads from rust is one of the simplest, but not the most efficient and rapid ways to solve the issue. The most important thing is that for such cleaning will not need "serious" funds. It is enough to have a rigid brush and any "aggressive" liquid. For manual cleaning, gasoline, kerosene, an auto cleaner suitable for manual cleaning. Just soak rusty products in the liquid for a couple of hours, and then work well with them with a brush. If it is not immediately able to clean, repeat a simple procedure to a victorious end.
Chemical cleaning
Acid cleaning will accurately help.
Chemical methods for cleaning threads from rust differ from manual much greater efficiency and speed solutions. However, to implement such measures will have to acquire special means, as well as to recall the safety technique. In addition, chemical cleaning differs from manual high variety of techniques.
Chemistry is the best option.
Remove rust will help soaking parts in sulfuric acid with an inhibitor or with zinc. After such soaking, it will still have to work as a brush, but the rubbing will have an order of magnitude less than with manual cleaning.
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In addition, such "grandfathers" techniques can be used as wrathing in the "Coca-Cole", in a solution of glycerin, water and a dental powder, in Kashitz from soda and water. Potatoes and economic soaps are not bad with rust (they need to rub the part), as well as fish oil and even "porridge" from flour and vinegar.
Any purification end with a flushing of the used composition or mortar under running water.