Shanghai oven manufacturers introduce you to the requirements of acid washing liquid analysis experiments
Boilers and cooling equipment are prone to scale rust, which often causes harm. Generally, pickling is used to remove scale rust to ensure safe production: the commonly used pickling solution is 5% HCl solution, and 0.3% hexamethylenetetramine is added as a corrosion inhibitor.
The hydrochloric acid cleaning process is a simultaneous process of chemical dissolution and mechanical separation. The main component of scale rust is iron oxidation (FeO,). When they react with hydrochloric acid to form FeCl3 and FeCl2, metal corrosion also occurs, and the exposed metal surface and FeCl. It reacts with HCl to form FeCl2. During the pickling process, the hydrochloric acid content should be checked for replenishment in a timely manner: the pickling time is determined by the decrease in the Fe" concentration in the pickling solution and the significant increase in the Fe+ concentration. Therefore, the acid is required to be measured during the pickling process. The concentration of hydrochloric acid in the washing liquid and the concentration of Fe", Fe".
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