Heat Exchanger Comprehensive Corrosion Control

Heat exchanger unit comprehensive corrosion control is from the design, manufacturing, storage, transportation and installation, operation and operation, maintenance, and other five aspects of corrosion protection control, so as to reduce corrosion losses to a minimum level.

Here is the content list:

• Corrosion prevention in the design

• Corrosion prevention during processing and manufacturing

• Storage and installation of anti-corrosion over the product

• Anti-corrosion in the production process

• Corrosion in the maintenance process

 

Corrosion prevention in the design

Correct structural design can reduce the corrosion of the heat exchanger unit. To eliminate gaps as far as possible to prevent the formation of liquid stagnation, dirt, and sediment accumulation should also avoid the direct scouring of fluid and heat exchanger vibration. In addition, attention should be paid to the adaptability of the materials in the entire system to each other, the correct choice of welding head design, to maintain an appropriate and uniform flow rate, temperature concentration, etc.

Corrosion prevention during processing and manufacturing

The feeding should be strictly in accordance with the design requirements and the materials used should be carefully checked. Cold processing will leave a large residual stress in the workpiece, when the entire heat exchanger unit processing is complete, should strive to carry out an overall or local heat treatment to eliminate residual stress, in the process to avoid the use of heavy objects such as rivet heads and another indiscriminate hammering. The welding process and its quality have a great impact on the life of the heat exchanger, which is mainly because it is extremely close to the relationship with corrosion, and thus should strengthen the management and guidance of the welding process.

Storage and installation of anti-corrosion over the product

The heat exchanger unit inventory period should mainly prevent atmospheric corrosion. The storage and installation process can not be scratched, touching the wall, or coated equipment, to protect the heat exchanger surface is clean and intact. The installation of the fastening force should be moderate, to avoid excessive force leaving residual stress, and the piping structure to avoid excessive concentration of stress. After the installation of the heat exchanger unit to be cleaned, cleaned up in a timely manner, to do a good job of protecting the metal surface from corrosion.

Anti-corrosion in the production process

The strict control of production working conditions is an important element of corrosion prevention. For example, when there is moisture, Freon will hydrolyze into acid, which has a corrosive effect on the metal; such as moisture exceeding the standard will seriously corrode the pipes of the heat exchanger unit. Heat exchanger unit normal operating parameters in the flow rate, temperature, and other indicators of the regulations also have a close relationship with the prevention of heat exchanger corrosion, and can not be changed at will.

Corrosion in the maintenance process

When the heat exchanger unit stops running later, according to the different circumstances develop measures to protect the equipment, and do a good job of checking the equipment during decommissioning.

The main purpose of corrosion and protection is to increase production and save. The practice has proved that the heat exchanger unit corrosion prevention management is good or bad for maintaining high utilization of heat exchanger equipment, reducing production costs, and improving productivity play an important role.