Acid washing is an important metal surface treatment process that can remove the oxide scale on the metal surface, improve the smoothness and corrosion resistance. However, in practical operation, the pickling process may encounter various problems, which not only affect the pickling effect, but also may lead to equipment damage and safety hazards. This article will list the possible problems encountered during the pickling process and provide corresponding troubleshooting methods.

1、 Equipment malfunction

Equipment failure is one of the common problems in the pickling process, which may include equipment aging, unreasonable design, etc.

Equipment aging: Equipment that has been used for a long time is prone to mechanical wear, air leakage, blockage, and other problems. These issues can lead to unstable pickling pressure and affect the pickling effect. To eliminate such problems, regular maintenance and upkeep of the equipment should be carried out, and aging parts should be replaced in a timely manner to reduce the occurrence of equipment failures.

Unreasonable equipment design: If the air inlet of the equipment is too small or the pneumatic conveying pipeline is slender and bent, it will affect the stability of the pickling pressure. In the case where the equipment structure cannot be changed, the stability of pickling pressure can be improved by appropriately increasing the air inlet area and optimizing the pipeline layout.

2、 Operational error

Operational errors are an important cause of pickling problems, which may involve the preparation, use, and management of pickling solution.

Inconsistent concentration of pickling solution: Improper preparation of pickling solution or failure to adjust pickling solution concentration in a timely manner during production may result in uneven pickling effect. To avoid this situation, production should strictly follow the acid formula and production process requirements to ensure the stability of acid concentration.

Unstable pickling process: Improper operation can lead to the inability to strictly control pickling process parameters such as temperature, time, acid concentration, etc. Therefore, operators should strictly follow the requirements of the pickling process and monitor and adjust the process parameters to ensure the stability of the pickling process.

3、 Other common problems during acid washing process

Uneven pickling: Uneven distribution or poor flow of pickling solution may lead to uneven pickling of metal surfaces. To solve this problem, it is necessary to ensure the uniform distribution and good fluidity of the pickling solution.

Excessive corrosion: Excessive acid concentration, high temperature, or long washing time in the pickling solution can all lead to excessive corrosion of the metal surface. Therefore, these parameters should be strictly controlled to avoid excessive corrosion.

Residual pollutants: Metal surfaces that have not been thoroughly cleaned and pickled may retain acidic or alkaline substances. To ensure cleaning effectiveness, appropriate cleaning methods should be used to thoroughly remove residues.

The acidic solution used in the pickling process poses potential hazards to operators and the environment. Therefore, it is necessary to strictly control the operating conditions and working environment of the pickling process to ensure the safety of operators and environmental protection.

In summary, there are various problems that may arise during the pickling process, involving equipment, operations, raw materials, and other aspects. To ensure the pickling effect and quality, operators should strictly follow the operating procedures, regularly maintain the equipment, and strictly control the process parameters. Only in this way can the problems encountered during the pickling process be effectively solved, ensuring the surface quality and production safety of the product.

Article source: Metal surface treatment service provider

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