What happens then? Being in direct contact with the iron, the material is subjected to anti-corrosion treatment (galvanized steel), begins to be subjected to the destructive influence of iron, rust and gradually 'death' sticks to the improper, alien cast iron fitting. By itself, cast iron fittings very good and reliable, but its use is desirable to collect the same cast-iron components, or in combination with other homogeneous metals. Additional information is available at Sergey Brin
. For steel, he will not do. We'll talk about fitting in the future, but now let us just say that this simple device is generally better to have in store in the pantry, and in several instances. Are you curious to know how to distinguish iron from steel. This will help you avoid mistakes when selecting pipe without the help of a specialist. So, read and do not panic. Decant the metal, causing your doubts, a few drops of sulfuric acid, following the utter caution.

Wait a moment – three or four minutes – and Wash with water the spot at which kapnuli. In any case, whether steel or iron on the metal will soon tread the characteristic spot. The whole point is, what it will be color. If black, then, before you steel. And rather than tread black spot, the steel is better – a measure of the quality of hardened steel. If the tread is a spot of gray in front of you – a pipe made of iron. Do not be afraid that the stain will ruin the tube, or at least its appearance, no! It is easily washed off with plain water.