Corrosion has always been a major factor in damaging the service life of boilers, and is also a problem that boiler manufacturers have been trying to solve. But in the final analysis, it is still necessary to start from the aspects of boiler manufacturing and later operation to avoid the bad situation of corrosion. In the boiler type of hot water boiler, high and low temperature corrosion has always been a difficult problem to overcome, and it is also a headache for users. Today, Zhengzhou Fangkuai Boiler Factory will lead you to find out how to avoid high and low temperature corrosion of hot water boilers.
High and low temperature corrosion of hot water boilers refers to low temperature corrosion and high temperature corrosion.
The low temperature corrosion is formed when the heated surface of the boiler tail is corroded by sulfuric acid, and then sulfur dioxide is generated. At the same time, under the action of the catalyst, sulfur trioxide is further generated. If it meets water vapor in the air, sulfuric acid vapor will be generated. When sulfuric acid vapor condenses on the heated surface of the preheater, there will be low temperature corrosion.
The formation of high-temperature corrosion is that at high temperatures, the tubes in the heating surface of the boiler, on the flue gas side and the steam side, are likely to corrode, mainly because the flue gas corrodes the tube wall.
There are primary and secondary instrument divisions in the boiler, and they are somewhat different, and their uses are also very different. The primary instrument mainly includes pressure gauge, water level gauge and thermometer. There are many secondary instruments, such as safety alarm system, monitoring system and water level control system, etc. The secondary instrument can be configured and increased or decreased according to the actual needs of the user. However, a safety alarm system is necessary, this is to ensure the safety of the boiler operation.
In the type of pressure hot water boilers, galvanized steel pipes can be used in the hot water pipes of the primary circulation system, because these pipes are not easy to deform and rust, and they are also very durable and can guarantee the boiler. Has a longer life.


Recently, Zhengzhou Fangkuai Boiler Sales Co., Ltd. traveled to Dhaka, the capital of Bangladesh, to attend the Bangladesh International Textile, Knitwear & Garment Industry Exhibition (BTKG 2026). It showcased industrial thermal equipment and system solutions adapted to the whole process of textile printing and dyeing, actively expanding the South Asian market.
Bangladesh is an important global producer and exporter of textiles and garments. As a pillar local industry, the textile sector has long-term and strong demand for high-efficiency, stable and energy-saving industrial boilers and thermal equipment, with broad market potential. This exhibition participation is an important measure for Zhengzhou Fangkuai Boiler Sales Co., Ltd. to advance its internationalization strategy and further explore overseas markets.

Relying on its technological accumulation and manufacturing advantages in the field of thermal energy equipment, the company provides targeted thermal energy solutions for local textile, printing and dyeing, garment manufacturing and other industries, helping enterprises improve production efficiency and reduce operating costs. In the future, Zhengzhou Fangkuai Boiler Sales Co., Ltd. will continue to focus on overseas market demands, continuously optimize its product and service system, facilitate the high-quality development of the global textile industry with professional and reliable products, and steadily enhance the brand’s competitiveness and influence in overseas markets.

Trust stems from quality
At the beginning of the new year, Fangkuai Boiler and a leading domestic new energy company have reached another important cooperation, successfully signing an order for a total of 500 steam tons.




