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Mechanical seal corrosion protection knowledge explain
1, the surface is evenly corroded. If the surface of the metal ring is in contact with the corrosive medium, surface corrosion will occur, which is caused by leakage, early wear, damage, sounding, and the like. The metal surface is uniformly corroded in both film-forming and film-free forms. The metal-free corrosion of the film is dangerous. It is called stress corrosion cracking. The hardfacing alloy and cast iron, tungsten carbide, titanium carbide and other sealing rings are used, which is prone to stress corrosion. rupture. The corrosion process is carried out at a certain speed, which increases the corrosion of the galvanic couple. Seals
2, stress corrosion cracking. The wear resistance of the metal under the action of corrosion and tensile stress. Dissolution or deterioration. For example, in hydrofluoric acid, the glass fiber molecules are thermally corroded, and these cracks communicate the entire sealing end face, accelerating the wear of the end face and increasing the leakage amount. Seals
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