It is an additive used in chemical cleaning to control metal corrosion during pickling. Metal corrosion is a common problem in the maintenance and cleaning of industrial equipment and facilities, and pickling is one of the effective ways to solve this problem. The application of water-soluble pickling corrosion inhibitors can significantly reduce the corrosion of metals during pickling and improve the safety and efficiency of cleaning.
1. The role of water-soluble pickling corrosion inhibitors.
The main function of water-soluble pickling corrosion inhibitors is to inhibit the corrosion of metals during pickling. During the pickling process, the acid reacts with the metal to produce hydrogen and metal salts, a process that accelerates the corrosion of the metal. Water-soluble pickling corrosion inhibitors protect metals from corrosion by forming a protective film on the surface of the metal that prevents acid erosion. This protective film has good resistance to acids and corrosion, and is able to withstand the corrosion of strong acids during the pickling process without causing adverse effects on the metal surface.
2. Types of water-soluble pickling corrosion inhibitors.
There are many types of water-soluble pickling corrosion inhibitors, which can be divided into two categories: inorganic corrosion inhibitors and organic corrosion inhibitors according to their composition. Inorganic corrosion inhibitors such as sodium silicate, nitrite, etc., organic corrosion inhibitors such as amines, aldehydes, heterocyclic compounds, etc. Among them, organic corrosion inhibitors are widely used in industrial production due to their high efficiency and low toxicity.
3. Application of water-soluble pickling corrosion inhibitors.
Water-soluble pickling corrosion inhibitors are widely used in the field of industrial cleaning, such as equipment and pipeline cleaning in petroleum, chemical, electric power, metallurgical and other industries. In the process of chemical cleaning, by adding an appropriate amount of water-soluble pickling corrosion inhibitor, the corrosion of the metal can be effectively controlled, the cleaning efficiency can be improved, the service life of the equipment can be prolonged, the frequency of equipment maintenance and replacement can be reduced, and the production cost can be reduced.
4. Preparation and use of water-soluble pickling corrosion inhibitors.
The formulation and use of water-soluble pickling corrosion inhibitors vary depending on the specific type and use. In general, according to the requirements of the cleaning equipment and metal materials, the appropriate type and concentration of corrosion inhibitors are selected and added to the pickling solution. In the process of use, the concentration and temperature of the pickling solution should be strictly controlled, and the operation should be carried out in accordance with the specified process flow to avoid metal corrosion and equipment damage caused by improper operation.
5. The development trend of water-soluble pickling corrosion inhibitors.
With the continuous improvement of environmental awareness and the continuous progress of technology, the development trend of water-soluble pickling corrosion inhibitors is to develop in the direction of high efficiency, low toxicity and environmental protection. New types of water-soluble pickling corrosion inhibitors, such as some organic amine corrosion inhibitors, are emerging with better corrosion inhibition and lower toxicity, bringing better options to the industrial cleaning industry. In addition, pickling corrosion inhibitors for special metal materials are constantly being developed to meet the needs of different fields.
VI. Conclusion. As an important additive in chemical cleaning, water-soluble pickling corrosion inhibitors play an important role in controlling metal corrosion during pickling. In practical applications, it is necessary to select the appropriate type and concentration of corrosion inhibitors according to the specific situation, and operate in strict accordance with the operating procedures to ensure the safety and efficiency of cleaning. At the same time, with the continuous progress of technology and the improvement of environmental protection requirements, the development of water-soluble pickling corrosion inhibitors will pay more attention to the performance improvement of high efficiency, low toxicity and environmental protection, so as to provide better support for the development of the industrial cleaning industry.