Why does the surface of medium carbon steel need to be dried in sheet metal manufacturing?


Why does the surface of medium carbon steel need to be dried in sheet metal manufacturing?

Sheet metal manufacturers often receive the most orders for carbon steel materials, whose surface treatment has an important impact on the quality and performance of the product. Among them, drying treatment is an important step in carbon steel surface treatment. This article will explain in detail why the surface of carbon steel needs drying treatment in sheet metal manufacturing, as well as the advantages, methods and precautions of drying treatment.


1. Why is drying necessary?


Drying treatment is an essential step during the surface treatment of carbon steel by sheet metal manufacturers. The main reasons are as follows:


Removal of moisture: During cleaning, pickling, phosphating and other processes, water or aqueous solutions will be used to treat the surface of carbon steel. Therefore, after the treatment is completed, the moisture on the surface needs to be completely removed to prevent residual moisture from causing corrosion and The coating is not strong.

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Prevent oxidation: Carbon steel surface treatment is prone to oxidation reactions when exposed to air, especially after pickling treatment, the surface is more likely to react with oxygen to produce oxides. Through drying, water can be evaporated quickly, reducing contact with oxygen, thereby reducing the possibility of oxidation.


Ensure coating quality: During surface treatment processes such as phosphating and painting, if there is moisture on the surface, it will affect the adhesion and sealing of the coating and reduce the quality and service life of the product. Therefore, the drying process ensures the quality and performance of the coating.


2. Advantages of drying treatment:


Ensure surface quality: Drying treatment can ensure that the surface of carbon steel is dry, avoid problems such as corrosion and weak coating due to moisture residue, and ensure surface quality.


Improve production efficiency: Through drying treatment, the surface treatment process can be accelerated, production efficiency can be improved, and the production cycle can be shortened.


Reduce energy consumption: Drying treatment can quickly dry the surface-treated carbon steel products, reduce the time for moisture to remain, and reduce energy consumption.


3. Drying treatment method:


In sheet metal manufacturing, common drying processing methods include:


Natural air drying: Place the treated carbon steel products in a well-ventilated environment, and use natural wind to evaporate surface moisture.


Hot air drying: Use hot air or a hot air furnace to dry carbon steel products to accelerate the evaporation of water.


Oven drying: Place carbon steel products in an oven, and evaporate surface moisture through heating to achieve the purpose of drying.


4. Precautions for drying:


Control the temperature: During the drying process, the temperature needs to be controlled to avoid changes in the surface of the carbon steel caused by excessive temperature.


Prevent excessive drying: The drying time should not be too long to avoid excessive drying affecting the quality of the carbon steel surface.


Maintain ventilation: Maintain good ventilation during the drying process to facilitate rapid evaporation of moisture.




In sheet metal manufacturing, drying the surface of carbon steel is an important step to ensure product quality. Drying treatment can effectively remove surface moisture, prevent oxidation, ensure coating quality, and improve production efficiency. It is an indispensable link in the surface treatment process of carbon steel. Therefore, the surface of medium carbon steel in sheet metal manufacturing needs to be dried to ensure product quality.