Corrosion of metal ring of mechanical seal for slurry pump

The special layout and working environment and conditions of mechanical seals for slurry pumps are different, and the shapes of corrosion damage are also various. Therefore, in order to better solve the problem, it is necessary to understand the reasons in advance. To understand the corrosion of the metal ring, so as to take appropriate measures.

1. The surface is uniformly corroded. If the surface of the metal ring touches the corrosive medium, and the metal itself is not resistant to corrosion, surface corrosion will occur, and the phenomenon is leakage, early wear, damage, and sound. The uniform corrosion of the metal surface has two forms: film-forming and film-free. The metal without film is very risky to corrode, which is called stress corrosion cracking. The use of surfacing cemented carbide and sealing rings such as cast iron, tungsten carbide, and titanium carbide can easily show stress corrosion. break. The corrosion process proceeds at a certain speed, which aggravates the galvanic corrosion.

2. Stress corrosion cracking. Metal mechanical seals for cartridge pumps under the combined effect of corrosion and tensile stress, wear resistance. The corrosion of the filled F4 ring mainly refers to the selective corrosion, dissolution or deterioration of the filling. For example, in hydrofluoric acid, the glass fiber molecules are thermally corroded, and these cracks connect the entire sealing end face, which accelerates the wear of the end face and increases the leakage.

The corrosion of the mechanical seal metal ring for slurry pump is mainly divided into the above two cases, each of which will affect the use of the equipment to varying degrees, so a detailed understanding of each corrosion effect can better deal with the corresponding work, so as to effectively of extended use of its equipment.