What factors need to be controlled when stainless steel heat exchange tubes are pickled?
By: mxgy,
There is a pickling process for stainless steel heat exchange tubes. Pickling is to remove scales in stainless steel heat exchange tubes. These scales are generally accumulated for a long time and will affect the performance and service life of stainless steel heat exchange tubes. Pickling can Cleans up effectively. Therefore, Max Stainless Steel will introduce to you the factors that should be controlled during the pickling process of stainless steel heat exchange tubes.
1. Method
The method of pickling stainless steel heat exchange tubes should be carried out according to the combination of static immersion and dynamic circulation.
2. Concentration
The pickling solution for pickling stainless steel heat exchange tubes can be configured according to the concentrations of formic acid 81.0%, water 17.0%, buffer 1.2%, and surfactant 0.8%, and the effect is more prominent.
3. Temperature
The higher the suspension temperature of the stainless steel heat exchange tube, the better the effect, but it should also be controlled not to be too high. If the pickling temperature is too high, the corrosion of the stainless steel heat exchange tube by the pickling solution will be aggravated, so the pickling temperature is controlled at 60°C The best left and right.
Four, time
In the process of pickling stainless steel heat exchange tubes, it should be soaked statically for 2 hours, and then dynamically circulated for 3-4 hours. During this period, samples should be taken frequently to test the pickling concentration. When the difference between the two adjacent test concentrations is less than 0.2%, that is It represents the end of the pickling reaction.
5. Passivation treatment
After pickling the stainless steel heat exchange tube, most of the scale and metal oxides on the surface of the stainless steel heat exchange tube will be dissolved and peeled off, exposing brand new metal, which is easy to be corroded, so the stainless steel heat exchange tube should be passivated at this time.
The above points are the factors that should be controlled during the pickling process of stainless steel heat exchange tubes.
What factors need to be controlled when stainless steel heat exchange tubes are pickled?
By: mxgy,
There is a pickling process for stainless steel heat exchange tubes. Pickling is to remove scales in stainless steel heat exchange tubes. These scales are generally accumulated for a long time and will affect the performance and service life of stainless steel heat exchange tubes. Pickling can Cleans up effectively. Therefore, Max Stainless Steel will introduce to you the factors that should be controlled during the pickling process of stainless steel heat exchange tubes.
1. Method
The method of pickling stainless steel heat exchange tubes should be carried out according to the combination of static immersion and dynamic circulation.
2. Concentration
The pickling solution for pickling stainless steel heat exchange tubes can be configured according to the concentrations of formic acid 81.0%, water 17.0%, buffer 1.2%, and surfactant 0.8%, and the effect is more prominent.
3. Temperature
The higher the suspension temperature of the stainless steel heat exchange tube, the better the effect, but it should also be controlled not to be too high. If the pickling temperature is too high, the corrosion of the stainless steel heat exchange tube by the pickling solution will be aggravated, so the pickling temperature is controlled at 60°C The best left and right.
Four, time
In the process of pickling stainless steel heat exchange tubes, it should be soaked statically for 2 hours, and then dynamically circulated for 3-4 hours. During this period, samples should be taken frequently to test the pickling concentration. When the difference between the two adjacent test concentrations is less than 0.2%, that is It represents the end of the pickling reaction.
5. Passivation treatment
After pickling the stainless steel heat exchange tube, most of the scale and metal oxides on the surface of the stainless steel heat exchange tube will be dissolved and peeled off, exposing brand new metal, which is easy to be corroded, so the stainless steel heat exchange tube should be passivated at this time.
The above points are the factors that should be controlled during the pickling process of stainless steel heat exchange tubes.
