1. The effect of hydrochloric acid concentration temperature
In the hydrochloric acid solution, the pickling speed is accelerated as the acid concentration increases and the temperature rises, but since the hydrochloric acid is volatile, the acid concentration and temperature are limited.
2. Effect of FeCl2 in acid solution
The shortest pickling time is obtained when the content of FeCl2 is optimal in the acid solution; the optimum FeCl2 content is lower than the saturation value of about 4-8% in this state; when FeCl2 is close to the saturation value, the acid The longest wash time.
During the acid washing of hydrochloric acid, although the content of hydrochloric acid is decreasing, at the same time, the FeCl2 is correspondingly increased, and the influencing factors of the two aspects cancel each other out within a certain pickling time, so the pickling speed during this period has only a slight change.
The pickling speed is such that the strip is allowed to reach a predetermined time in the acid solution, and the acid pickling is passed through the acid solution at an excessively fast rate.
The degree of mechanical phosphorus breakage is sufficient to accelerate the pickling speed.
In the hydrochloric acid solution, the pickling speed is accelerated as the acid concentration increases and the temperature rises, but since the hydrochloric acid is volatile, the acid concentration and temperature are limited.
2. Effect of FeCl2 in acid solution
The shortest pickling time is obtained when the content of FeCl2 is optimal in the acid solution; the optimum FeCl2 content is lower than the saturation value of about 4-8% in this state; when FeCl2 is close to the saturation value, the acid The longest wash time.
During the acid washing of hydrochloric acid, although the content of hydrochloric acid is decreasing, at the same time, the FeCl2 is correspondingly increased, and the influencing factors of the two aspects cancel each other out within a certain pickling time, so the pickling speed during this period has only a slight change.
The pickling speed is such that the strip is allowed to reach a predetermined time in the acid solution, and the acid pickling is passed through the acid solution at an excessively fast rate.
The degree of mechanical phosphorus breakage is sufficient to accelerate the pickling speed.
