Corrosion causes and protection of tubular condensers

The materials of condenser are generally carbon steel, stainless steel and copper. When the tube plate made of carbon steel is used as a cooler, the weld seam between the tube plate and the column tube often has corrosion leakage, and the leakage into the cooling water system will cause pollution of the environment and waste of materials.

Corrosion causes and protection of the tube condenser

When the condenser is made, the welding between the tube plate and the tube is generally done by manual arc welding, and there are different degrees of defects in the shape of the weld, such as depression, porosity, slag, etc. The distribution of stress in the weld is also uneven. When using the tube plate part and industrial cooling water contact, and industrial cooling water impurities, salts, gases, micro-organisms will constitute the corrosion of the tube plate and weld seam. Wuxi Dongjin: tube condenser corrosion causes and protection. Research shows that industrial water, whether freshwater or seawater, there will be a variety of ions and dissolved oxygen, of which the concentration of chloride ions and oxygen changes, play an important role in the corrosion of metal shape.

In addition, the complexity of the metal structure will also affect the corrosion shape. Therefore, the corrosion of the tube plate and tube weld to hole corrosion and crevice corrosion. Wuxi Dongjin: tube condenser corrosion causes and protection from the outside, the surface of the tube plate will have a lot of corrosion products and accumulation of sediment, the distribution of varying sizes of bubbles. When seawater is used as the medium, it will also produce galvanic corrosion. Bimetallic corrosion is also a common phenomenon of tube plate corrosion.

For the problem of condenser corrosion, the West mostly uses the method of polymer composite materials for protection, of which the application of super is Megawatt technology products. Wuxi Dongjin:The causes of corrosion and protection of the tube condenser has excellent adhesion performance and resistance to temperature and chemical corrosion, and can be used safely in a closed environment without shrinkage, especially good isolation of bimetallic corrosion and scouring resistance, fundamentally eliminating the corrosion leakage of the repair parts, providing a long-lasting protective coating for the condenser.